<?xml version="1.0" encoding="US-ASCII"?>
<!-- RR Donnelley Xcelerate Taxonomy Presentation Linkbase, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
<!-- Version: 6.21.0 -->
<!-- Round: 13055468-a3e9-4dfd-af73-1c82dbe3f361 -->
<!-- Creation date: 2013-08-07T17:13:42Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley &amp; Sons Company All Rights Reserved. -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DocumentDocumentandEntityInformation" roleURI="http://www.nvtl.com/taxonomy/role/DocumentDocumentandEntityInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_StatementOfFinancialPositionClassified" roleURI="http://www.nvtl.com/taxonomy/role/StatementOfFinancialPositionClassified"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_StatementOfFinancialPositionClassifiedParen" roleURI="http://www.nvtl.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_StatementOfIncome" roleURI="http://www.nvtl.com/taxonomy/role/StatementOfIncome"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_StatementOfPartnersCapital" roleURI="http://www.nvtl.com/taxonomy/role/StatementOfPartnersCapital"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_StatementOfCashFlowsIndirect" roleURI="http://www.nvtl.com/taxonomy/role/StatementOfCashFlowsIndirect"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureBalanceSheetDetailsSummaryOfMarketableSecuritiesAvailableforSale" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfMarketableSecuritiesAvailableforSale"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureBalanceSheetDetailsAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureBalanceSheetDetailsSummaryOfInventories" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfInventories"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureBalanceSheetDetailsSummaryOfAccruedExpenses" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfAccruedExpenses"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureBalanceSheetDetailsSummaryOfAccruedWarrantyObligations" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfAccruedWarrantyObligations"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureIntangibleAssetsScheduleOfAmortizablePurchasedIntangibleAssetsFromAcquisition" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsScheduleOfAmortizablePurchasedIntangibleAssetsFromAcquisition"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureIntangibleAssetsSummaryOfAmortizationExpensesOfPurchasedIntangibleAssets" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsSummaryOfAmortizationExpensesOfPurchasedIntangibleAssets"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureIntangibleAssetsAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureIntangibleAssetsScheduleOfAmortizationExpenseOfPurchasedIntangibleAssetsExpectedToBeRecognized" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsScheduleOfAmortizationExpenseOfPurchasedIntangibleAssetsExpectedToBeRecognized"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureGoodwillAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureGoodwillAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureFairValueMeasurementOfAssetsAndLiabilitiesSummaryOfCompanysFinancialInstrumentFairValueOnARecurringBasis" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureFairValueMeasurementOfAssetsAndLiabilitiesSummaryOfCompanysFinancialInstrumentFairValueOnARecurringBasis"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureShareBasedCompensationSummaryOfPaymentForShareBasedCompensationAwards" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureShareBasedCompensationSummaryOfPaymentForShareBasedCompensationAwards"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfNetRevenuesOperatingLossAndIdentifiableAssetsOfSegments" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfNetRevenuesOperatingLossAndIdentifiableAssetsOfSegments"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfTheAssets" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfTheAssets"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfNetRevenues" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfNetRevenues"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureSegmentInformationAndConcentrationsOfRiskAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureEarningsPerShareAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureEarningsPerShareAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureCommitmentsAndContingenciesAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#DisclosureIncomeTaxesAdditionalInformation" roleURI="http://www.nvtl.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockPolicies" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockPolicies"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlockTables" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlockTables" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsGoodwillDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsGoodwillDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlockTables" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsEarningsPerShareTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock"/>
  <roleRef xlink:type="simple" xlink:href="nvtl-20130630.xsd#Role_NotesToFinancialStatementsIncomeTaxDisclosureTextBlock" roleURI="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock"/>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DocumentDocumentandEntityInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:label="nvtl_DocumentDocumentAndEntityInformationAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2013/dei-2013-01-31.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_DocumentType" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_AmendmentFlag" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_DocumentPeriodEndDate" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_DocumentFiscalYearFocus" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_DocumentFiscalPeriodFocus" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_TradingSymbol" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_EntityRegistrantName" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_EntityCentralIndexKey" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_CurrentFiscalYearEndDate" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_EntityFilerCategory" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_DocumentDocumentAndEntityInformationAbstract" xlink:to="dei_EntityCommonStockSharesOutstanding" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/StatementOfFinancialPositionClassified">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="us-gaap_DeferredTaxAssetsNetCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="us-gaap_DeferredTaxAssetsNetNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="us-gaap_LinesOfCreditCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="us-gaap_MarketableSecuritiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesNoncurrent" xlink:label="us-gaap_MarketableSecuritiesNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesRestrictedCurrent" xlink:label="us-gaap_MarketableSecuritiesRestrictedCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityBeforeTreasuryStock" xlink:label="us-gaap_StockholdersEquityBeforeTreasuryStock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="us-gaap_TreasuryStockValue"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsCurrentAbstract" order="1.2800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" order="1.2900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_MarketableSecuritiesNoncurrent" order="1.3000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill" order="1.3100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_DeferredTaxAssetsNetNoncurrent" order="1.3200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_OtherAssetsNoncurrent" order="1.3300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_Assets" order="1.3400" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1.1300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_MarketableSecuritiesCurrent" order="1.1400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_MarketableSecuritiesRestrictedCurrent" order="1.1500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AccountsReceivableNetCurrent" order="1.1600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_InventoryNet" order="1.1700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_DeferredTaxAssetsNetCurrent" order="1.1800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" order="1.1900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrent" order="1.2000" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract" order="1.2100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_OtherLiabilitiesNoncurrent" order="1.2200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_Liabilities" order="1.2300" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract" order="1.2400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" order="1.2500" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccountsPayableCurrent" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccruedLiabilitiesCurrent" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LinesOfCreditCurrent" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrent" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_AssetsAbstract" order="1.2600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract" order="1.2700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_PreferredStockValue" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_CommonStockValue" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_AdditionalPaidInCapital" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityBeforeTreasuryStock" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_TreasuryStockValue" order="1.1100" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquity" order="1.1200" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AcquiredIntangibleAssetsAccumulatedAmortization" xlink:label="nvtl_AcquiredIntangibleAssetsAccumulatedAmortization"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="us-gaap_TreasuryStockShares"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="nvtl_AcquiredIntangibleAssetsAccumulatedAmortization" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_PreferredStockSharesAuthorized" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_PreferredStockSharesOutstanding" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_CommonStockSharesAuthorized" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_CommonStockSharesIssued" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_CommonStockSharesOutstanding" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_TreasuryStockShares" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/StatementOfIncome">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="us-gaap_AmortizationOfIntangibleAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingCostsAndExpensesAbstract" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="us-gaap_SellingAndMarketingExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted" order="1.1400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_Revenues" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_CostOfRevenue" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_GrossProfit" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_OperatingCostsAndExpensesAbstract" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpenseAbstract" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefit" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_NetIncomeLoss" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedAbstract" order="1.1200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" order="1.1300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_ResearchAndDevelopmentExpense" order="1.1500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_SellingAndMarketingExpense" order="1.1600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_GeneralAndAdministrativeExpense" order="1.1700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_GoodwillAndIntangibleAssetImpairment" order="1.1800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_AmortizationOfIntangibleAssets" order="1.1900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_OperatingExpenses" order="1.2000" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingCostsAndExpensesAbstract" xlink:to="us-gaap_OperatingIncomeLoss" order="1.2100" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_InterestIncomeExpenseNonoperatingNet" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpense" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/StatementOfPartnersCapital">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_NetIncomeLoss" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/StatementOfCashFlowsIndirect">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_2"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_CashPaidDuringYearAbstract" xlink:label="nvtl_CashPaidDuringYearAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_GainLossOnSaleOfFixedAssets" xlink:label="nvtl_GainLossOnSaleOfFixedAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="us-gaap_InventoryWriteDown"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments" xlink:label="us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_NonCashIncomeTaxExpenseBenefit" xlink:label="nvtl_NonCashIncomeTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="us-gaap_ProvisionForDoubtfulAccounts"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RepaymentsOfShortTermDebt" xlink:label="us-gaap_RepaymentsOfShortTermDebt"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="nvtl_GainLossOnSaleOfFixedAssets" order="1.0500" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_DepreciationAndAmortization" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_GoodwillAndIntangibleAssetImpairment" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ProvisionForDoubtfulAccounts" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments" order="1.0900" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_InventoryWriteDown" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ShareBasedCompensation" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="nvtl_NonCashIncomeTaxExpenseBenefit" order="1.1200" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_CashPaidDuringYearAbstract" xlink:to="us-gaap_InterestPaidNet" order="1.3600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_CashPaidDuringYearAbstract" xlink:to="us-gaap_IncomeTaxesPaidNet" order="1.3700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable" order="1.1700" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInInventories" order="1.1800" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" order="1.1900" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable" order="1.2000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" order="1.2100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromRepaymentsOfShortTermDebt" order="1.2200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_RepaymentsOfShortTermDebt" order="1.2300" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" order="1.2400" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromStockOptionsExercised" order="1.2500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities" order="1.2600" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" order="1.1300" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_PaymentsToAcquireMarketableSecurities" order="1.1400" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" order="1.1500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities" order="1.1600" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetIncomeLoss" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" order="1.2700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" order="1.2800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" order="1.2900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" order="1.3000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" order="1.3100" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1.3200" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_2" order="1.3300" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract" order="1.3400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="nvtl_CashPaidDuringYearAbstract" order="1.3500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfMarketableSecuritiesAvailableforSale">
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract" xlink:label="nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="us-gaap_AvailableForSaleSecurities"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="us-gaap_AvailableForSaleSecuritiesAmortizedCost"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains" xlink:label="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss" xlink:label="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="us-gaap_CertificatesOfDepositMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_CorporateDebenturesBondsMember" xlink:label="nvtl_CorporateDebenturesBondsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_LongTermMarketableSecuritiesMember" xlink:label="nvtl_LongTermMarketableSecuritiesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_MarketableSecuritiesMaturityInYears" xlink:label="nvtl_MarketableSecuritiesMaturityInYears"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="us-gaap_MunicipalBondsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_ShortTermMarketableSecuritiesMember" xlink:label="nvtl_ShortTermMarketableSecuritiesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract" xlink:to="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="nvtl_ShortTermMarketableSecuritiesMember" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="nvtl_LongTermMarketableSecuritiesMember" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_USGovernmentAgenciesDebtSecuritiesMember" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_MunicipalBondsMember" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_CertificatesOfDepositMember" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="nvtl_CorporateDebenturesBondsMember" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:to="nvtl_MarketableSecuritiesMaturityInYears" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:to="us-gaap_AvailableForSaleSecuritiesAmortizedCost" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:to="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:to="us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss" order="1.0400" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:to="us-gaap_AvailableForSaleSecurities" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:to="us-gaap_InvestmentTypeAxis" order="11.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:to="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsAdditionalInformation">
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract" xlink:label="nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AvailableforsaleSecuritiesGrossUnrealizedGainLossAccumulatedInAoci" xlink:label="nvtl_AvailableforsaleSecuritiesGrossUnrealizedGainLossAccumulatedInAoci"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_BalanceSheetDetailsLineItems" xlink:label="nvtl_BalanceSheetDetailsLineItems"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_InvestmentsSecuritiesInUnrealizedLossPositionForContinuousTwelveMonthPeriodOrLongerBookValue" xlink:label="nvtl_InvestmentsSecuritiesInUnrealizedLossPositionForContinuousTwelveMonthPeriodOrLongerBookValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityAmountOutstanding" xlink:label="us-gaap_LineOfCreditFacilityAmountOutstanding"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod" xlink:label="us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_MarketableSecuritiesHeldAtBank" xlink:label="nvtl_MarketableSecuritiesHeldAtBank"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesRestrictedCurrent" xlink:label="us-gaap_MarketableSecuritiesRestrictedCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_ProductWarrantyCoveragePeriod" xlink:label="nvtl_ProductWarrantyCoveragePeriod"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeAxis" xlink:label="us-gaap_RangeAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RangeMember" xlink:label="us-gaap_RangeMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_ScheduleOfBalanceSheetDetailsTable" xlink:label="nvtl_ScheduleOfBalanceSheetDetailsTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StandardProductWarrantyDescription" xlink:label="us-gaap_StandardProductWarrantyDescription"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_AmortizedCostAndFairValueDebtSecuritiesAbstract" xlink:to="nvtl_ScheduleOfBalanceSheetDetailsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="nvtl_MarketableSecuritiesHeldAtBank" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="us-gaap_LineOfCreditFacilityAmountOutstanding" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="us-gaap_MarketableSecuritiesRestrictedCurrent" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="nvtl_AvailableforsaleSecuritiesGrossUnrealizedGainLossAccumulatedInAoci" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="nvtl_InvestmentsSecuritiesInUnrealizedLossPositionForContinuousTwelveMonthPeriodOrLongerBookValue" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="us-gaap_StandardProductWarrantyDescription" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_BalanceSheetDetailsLineItems" xlink:to="nvtl_ProductWarrantyCoveragePeriod" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RangeAxis" xlink:to="us-gaap_RangeMember" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RangeMember" xlink:to="us-gaap_MinimumMember" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RangeMember" xlink:to="us-gaap_MaximumMember" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_ScheduleOfBalanceSheetDetailsTable" xlink:to="us-gaap_RangeAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_ScheduleOfBalanceSheetDetailsTable" xlink:to="nvtl_BalanceSheetDetailsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfInventories">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="us-gaap_InventoryFinishedGoods"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="us-gaap_InventoryRawMaterials"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryFinishedGoods" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryRawMaterials" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryNet" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfAccruedExpenses">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="us-gaap_AccruedProfessionalFeesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedRoyaltiesCurrent" xlink:label="us-gaap_AccruedRoyaltiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRentCreditCurrent" xlink:label="us-gaap_DeferredRentCreditCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredRevenue" xlink:label="us-gaap_DeferredRevenue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_MarketDevelopmentFundAndPriceProtection" xlink:label="nvtl_MarketDevelopmentFundAndPriceProtection"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="us-gaap_PayablesAndAccrualsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductWarrantyAccrual" xlink:label="us-gaap_ProductWarrantyAccrual"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_AccruedRoyaltiesCurrent" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_ProductWarrantyAccrual" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="nvtl_MarketDevelopmentFundAndPriceProtection" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_DeferredRentCreditCurrent" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_AccruedProfessionalFeesCurrent" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_DeferredRevenue" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_AccruedLiabilitiesCurrent" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureBalanceSheetDetailsSummaryOfAccruedWarrantyObligations">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GuaranteesAbstract" xlink:label="us-gaap_GuaranteesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductWarrantyAccrual" xlink:label="us-gaap_ProductWarrantyAccrual"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductWarrantyAccrual" xlink:label="us-gaap_ProductWarrantyAccrual_2"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductWarrantyAccrualPayments" xlink:label="us-gaap_ProductWarrantyAccrualPayments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProductWarrantyAccrualWarrantiesIssued" xlink:label="us-gaap_ProductWarrantyAccrualWarrantiesIssued"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteesAbstract" xlink:to="us-gaap_ProductWarrantyAccrual" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteesAbstract" xlink:to="us-gaap_ProductWarrantyAccrualWarrantiesIssued" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteesAbstract" xlink:to="us-gaap_ProductWarrantyAccrualPayments" order="1.0300" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteesAbstract" xlink:to="us-gaap_ProductWarrantyAccrual_2" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsScheduleOfAmortizablePurchasedIntangibleAssetsFromAcquisition">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="us-gaap_DevelopedTechnologyRightsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_IntangibleAssetsImpairedAccumulatedImpairmentLoss" xlink:label="nvtl_IntangibleAssetsImpairedAccumulatedImpairmentLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="us-gaap_OtherIntangibleAssetsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="us-gaap_TradeNamesMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" order="1.0500" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="nvtl_IntangibleAssetsImpairedAccumulatedImpairmentLoss" order="1.0600" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_DevelopedTechnologyRightsMember" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_TradeNamesMember" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_OtherIntangibleAssetsMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsSummaryOfAmortizationExpensesOfPurchasedIntangibleAssets">
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AmortizationExpenseMember" xlink:label="nvtl_AmortizationExpenseMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="us-gaap_AmortizationOfIntangibleAssets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ChangeInAccountingEstimateLineItems" xlink:label="us-gaap_ChangeInAccountingEstimateLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="us-gaap_CostOfSalesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingExpenseMember" xlink:label="us-gaap_OperatingExpenseMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfChangeInAccountingEstimateTable" xlink:label="us-gaap_ScheduleOfChangeInAccountingEstimateTable"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ChangeInAccountingEstimateLineItems" xlink:to="us-gaap_AmortizationOfIntangibleAssets" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_ScheduleOfChangeInAccountingEstimateTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_CostOfSalesMember" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_OperatingExpenseMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="nvtl_AmortizationExpenseMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfChangeInAccountingEstimateTable" xlink:to="us-gaap_IncomeStatementLocationAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfChangeInAccountingEstimateTable" xlink:to="us-gaap_ChangeInAccountingEstimateLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_FiniteLivedIntangibleAssetsImpairmentLosses" xlink:label="nvtl_FiniteLivedIntangibleAssetsImpairmentLosses"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="us-gaap_LicensingAgreementsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="nvtl_FiniteLivedIntangibleAssetsImpairmentLosses" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_LicensingAgreementsMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureIntangibleAssetsScheduleOfAmortizationExpenseOfPurchasedIntangibleAssetsExpectedToBeRecognized">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureGoodwillAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillImpairmentLoss" xlink:label="us-gaap_GoodwillImpairmentLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillMember" xlink:label="us-gaap_GoodwillMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:label="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:to="us-gaap_Goodwill" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:to="us-gaap_GoodwillImpairmentLoss" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:to="us-gaap_GoodwillAndIntangibleAssetImpairment" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:to="us-gaap_ImpairmentOfIntangibleAssetsFinitelived" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_GoodwillMember" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureFairValueMeasurementOfAssetsAndLiabilitiesSummaryOfCompanysFinancialInstrumentFairValueOnARecurringBasis">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAbstract" xlink:label="us-gaap_AvailableForSaleSecuritiesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="us-gaap_CertificatesOfDepositMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_CorporateDebenturesBondsMember" xlink:label="nvtl_CorporateDebenturesBondsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="us-gaap_FairValueMeasurementsRecurringMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems" xlink:label="nvtl_FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="us-gaap_LongTermInvestments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesCurrentAbstract" xlink:label="us-gaap_MarketableSecuritiesCurrentAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="us-gaap_MoneyMarketFundsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="us-gaap_MunicipalBondsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="us-gaap_USTreasurySecuritiesMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="us-gaap_MarketableSecuritiesCurrentAbstract" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="us-gaap_AssetsFairValueDisclosure" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AvailableForSaleSecuritiesAbstract" xlink:to="us-gaap_ShortTermInvestments" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AvailableForSaleSecuritiesAbstract" xlink:to="us-gaap_LongTermInvestments" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" xlink:to="us-gaap_CashEquivalentsAtCarryingValue" order="1.1200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByAssetClassAxis" order="11.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" order="12.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="nvtl_FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_MoneyMarketFundsMember" order="1.1000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_USTreasurySecuritiesMember" order="1.1100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueMeasurementsRecurringMember" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueInputsLevel1Member" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="nvtl_FairValueOfAssetsAndLiabilitiesMeasuredOnNonRecurringBasisLineItems" xlink:to="us-gaap_AssetsFairValueDisclosureAbstract" order="1.1700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:to="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_USGovernmentAgenciesDebtSecuritiesMember" order="1.1300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_MunicipalBondsMember" order="1.1400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="us-gaap_CertificatesOfDepositMember" order="1.1500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:to="nvtl_CorporateDebenturesBondsMember" order="1.1600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MarketableSecuritiesCurrentAbstract" xlink:to="us-gaap_AvailableForSaleSecuritiesAbstract" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureShareBasedCompensationSummaryOfPaymentForShareBasedCompensationAwards">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="us-gaap_CostOfSalesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="us-gaap_SellingAndMarketingExpenseMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_CostOfSalesMember" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingAndMarketingExpenseMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_GeneralAndAdministrativeExpenseMember" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:to="us-gaap_IncomeStatementLocationAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfNetRevenuesOperatingLossAndIdentifiableAssetsOfSegments">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="us-gaap_ConsolidationItemsAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="us-gaap_ConsolidationItemsDomain"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_MobileComputingProductsMember" xlink:label="nvtl_MobileComputingProductsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLossAbstract" xlink:label="us-gaap_OperatingIncomeLossAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueGoodsNetAbstract" xlink:label="us-gaap_SalesRevenueGoodsNetAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationRevenueAbstract" xlink:label="us-gaap_SegmentReportingInformationRevenueAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_TradeSecretsMember" xlink:label="us-gaap_TradeSecretsMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsAxis" xlink:to="us-gaap_ConsolidationItemsDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsDomain" xlink:to="us-gaap_OperatingSegmentsMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingIncomeLossAbstract" xlink:to="us-gaap_OperatingIncomeLoss" order="1.0900" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SalesRevenueGoodsNetAbstract" xlink:to="us-gaap_Revenues" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_ConsolidationItemsAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" order="11.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_SegmentReportingInformationLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain" xlink:to="nvtl_MobileComputingProductsMember" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_TradeSecretsMember" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SalesRevenueGoodsNetAbstract" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_OperatingIncomeLossAbstract" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationRevenueAbstract" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationRevenueAbstract" xlink:to="us-gaap_Assets" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfTheAssets">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_CA" xlink:label="country_CA"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="us-gaap_ConsolidationItemsAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="us-gaap_ConsolidationItemsDomain"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_EuropeLatinAmericaAndAsiaMember" xlink:label="nvtl_EuropeLatinAmericaAndAsiaMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="us-gaap_SegmentGeographicalDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="us-gaap_StatementGeographicalAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_US" xlink:label="country_US"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsAxis" xlink:to="us-gaap_ConsolidationItemsDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsDomain" xlink:to="us-gaap_OperatingSegmentsMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:to="us-gaap_Assets" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_ConsolidationItemsAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_StatementGeographicalAxis" order="11.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="country_US" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="country_CA" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="nvtl_EuropeLatinAmericaAndAsiaMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementGeographicalAxis" xlink:to="us-gaap_SegmentGeographicalDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskScheduleOfGeographicConcentrationOfNetRevenues">
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_AsiaCountriesMember" xlink:label="nvtl_AsiaCountriesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="us-gaap_ConsolidationItemsAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="us-gaap_ConsolidationItemsDomain"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_EuropeCountriesMember" xlink:label="nvtl_EuropeCountriesMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LatinAmericaMember" xlink:label="us-gaap_LatinAmericaMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_RevenueFromExternalCustomersByGeographicRegion" xlink:label="nvtl_RevenueFromExternalCustomersByGeographicRegion"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="us-gaap_SegmentGeographicalDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="us-gaap_StatementGeographicalAxis"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_UnitedStatesAndCanadaMember" xlink:label="nvtl_UnitedStatesAndCanadaMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsAxis" xlink:to="us-gaap_ConsolidationItemsDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConsolidationItemsDomain" xlink:to="us-gaap_OperatingSegmentsMember" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:to="nvtl_RevenueFromExternalCustomersByGeographicRegion" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_ConsolidationItemsAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_StatementGeographicalAxis" order="11.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="nvtl_UnitedStatesAndCanadaMember" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="us-gaap_LatinAmericaMember" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="nvtl_EuropeCountriesMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="nvtl_AsiaCountriesMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementGeographicalAxis" xlink:to="us-gaap_SegmentGeographicalDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureSegmentInformationAndConcentrationsOfRiskAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_CustomerOneMember" xlink:label="nvtl_CustomerOneMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_CustomerTwoMember" xlink:label="nvtl_CustomerTwoMember"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_SegmentReportingInformationLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain" xlink:to="nvtl_CustomerOneMember" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain" xlink:to="nvtl_CustomerTwoMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_ConcentrationRiskPercentage1" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureEarningsPerShareAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="us-gaap_LitigationCaseAxis"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="us-gaap_LitigationCaseTypeDomain"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LitigationSettlementAmount" xlink:label="us-gaap_LitigationSettlementAmount"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="us-gaap_LossContingenciesLineItems"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="us-gaap_LossContingenciesTable"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LossContingencyLawsuitFilingDate" xlink:label="us-gaap_LossContingencyLawsuitFilingDate"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_SeptemberEighteenthTwoThousandEightMember" xlink:label="nvtl_SeptemberEighteenthTwoThousandEightMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_SeptemberFifteenthTwoThousandEightMember" xlink:label="nvtl_SeptemberFifteenthTwoThousandEightMember"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_SeptemberTwentyFourthTwoThousandTenMember" xlink:label="nvtl_SeptemberTwentyFourthTwoThousandTenMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_LossContingenciesTable" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LitigationCaseAxis" xlink:to="us-gaap_LitigationCaseTypeDomain" order="1.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LitigationCaseTypeDomain" xlink:to="nvtl_SeptemberFifteenthTwoThousandEightMember" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LitigationCaseTypeDomain" xlink:to="nvtl_SeptemberEighteenthTwoThousandEightMember" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LitigationCaseTypeDomain" xlink:to="nvtl_SeptemberTwentyFourthTwoThousandTenMember" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingencyLawsuitFilingDate" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LitigationSettlementAmount" order="1.0200" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LitigationCaseAxis" order="10.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesLineItems" order="100.0000" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredOtherTaxExpenseBenefit" xlink:label="us-gaap_DeferredOtherTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_InterestExpenseRelatedToUncertainTaxPositions" xlink:label="nvtl_InterestExpenseRelatedToUncertainTaxPositions"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_UncertainIncomeTaxPositionUnrecognized" xlink:label="nvtl_UncertainIncomeTaxPositionUnrecognized"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:label="us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations" xlink:label="us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_DeferredOtherTaxExpenseBenefit" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNet" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefit" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="nvtl_UncertainIncomeTaxPositionUnrecognized" order="1.0500" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" order="1.0600" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="nvtl_InterestExpenseRelatedToUncertainTaxPositions" order="1.0700" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations" order="1.0800" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockPolicies">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="us-gaap_ConsolidationPolicyTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_ConsolidationPolicyTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_UseOfEstimates" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlockTables">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MarketableSecuritiesTextBlock" xlink:label="us-gaap_MarketableSecuritiesTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" xlink:label="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="us-gaap_MarketableSecuritiesTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="us-gaap_ScheduleOfInventoryCurrentTableTextBlock" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock" order="1.0400" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IntangibleAssetsDisclosureTextBlock" xlink:label="us-gaap_IntangibleAssetsDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_IntangibleAssetsDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIntangibleAssetsDisclosureTextBlockTables">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="nvtl-20130630.xsd#nvtl_PurchasedIntangibleAssetAmortizationExpenseClassificationTableTextBlock" xlink:label="nvtl_PurchasedIntangibleAssetAmortizationExpenseClassificationTableTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="nvtl_PurchasedIntangibleAssetAmortizationExpenseClassificationTableTextBlock" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsGoodwillDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GoodwillDisclosureTextBlock" xlink:label="us-gaap_GoodwillDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_GoodwillDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:label="us-gaap_FairValueMeasurementInputsDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueMeasurementInputsDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsFairValueMeasurementInputsDisclosureTextBlockTables">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock" xlink:label="us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_SegmentReportingDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock" xlink:label="us-gaap_ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock" xlink:label="us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfEntityWideDisclosureOnGeographicAreasLongLivedAssetsInIndividualForeignCountriesByCountryTextBlock" order="1.0200" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfRevenueFromExternalCustomersAttributedToForeignCountriesByGeographicAreaTextBlock" order="1.0300" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsEarningsPerShareTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="us-gaap_EarningsPerShareTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
  <presentationLink xlink:type="extended" xlink:role="http://www.nvtl.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock" order="1.0100" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" use="optional"/>
  </presentationLink>
</linkbase>
