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  <element name="OtherAccountsReceivableAndPrepaidExpensesTableTextBlock" id="allt_OtherAccountsReceivableAndPrepaidExpensesTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="OtherCountriesMember" id="allt_OtherCountriesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="OtherExpensesAndExchangeRateDifferences" id="allt_OtherExpensesAndExchangeRateDifferences" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="OtherPayablesAndAccruedExpensesDetailsAbstract" id="allt_OtherPayablesAndAccruedExpensesDetailsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="OtherPayablesAndAccruedLiabilitiesCurrent" id="allt_OtherPayablesAndAccruedLiabilitiesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="OutsideDevelopmentZoneMember" id="allt_OutsideDevelopmentZoneMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PatentUseRightPeriod" id="allt_PatentUseRightPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PreferredEnterpriseMember" id="allt_PreferredEnterpriseMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PrepaymentToOem" id="allt_PrepaymentToOem" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="PriorPeriodOtherReceivablesAndPrepaidExpensesReclassifiedToNoncurrentAssets" id="allt_PriorPeriodOtherReceivablesAndPrepaidExpensesReclassifiedToNoncurrentAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="PropertyAndEquipmentPercentageOfDepreciationAtAnnualRateTableTextBlock" id="allt_PropertyAndEquipmentPercentageOfDepreciationAtAnnualRateTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="PropertyPlantAndEquipmentEstimatedUsefulLivesAnnualRate" id="allt_PropertyPlantAndEquipmentEstimatedUsefulLivesAnnualRate" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ProvisionForReturns" id="allt_ProvisionForReturns" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="RemainingPerformanceObligations" id="allt_RemainingPerformanceObligations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="RemainingPerformanceObligationsShortTerm" id="allt_RemainingPerformanceObligationsShortTerm" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit"/>
  <element name="RestrictedHoldbackAmount" id="allt_RestrictedHoldbackAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="RoyaltyBearingGrantsPolicyTextBlock" id="allt_RoyaltyBearingGrantsPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="RoyaltyExpensePercentageOfGrants" id="allt_RoyaltyExpensePercentageOfGrants" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="RoyaltyExpensePercentageOfNetSales" id="allt_RoyaltyExpensePercentageOfNetSales" type="dtr-types:percentItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRateTableTextBlock" id="allt_ScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRateTableTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SecuritySolutionsMember" id="allt_SecuritySolutionsMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SeverancePayFund" id="allt_SeverancePayFund" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="SeverancePayPolicyTextBlock" id="allt_SeverancePayPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultiple" id="allt_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultiple" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultipleMaximum" id="allt_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultipleMaximum" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultipleMinimum" id="allt_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsSuboptimalExerciseMultipleMinimum" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="ShortTermBankDepositsHedgingTransactions" id="allt_ShortTermBankDepositsHedgingTransactions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="ShortTermBankDepositsPolicyTextBlock" id="allt_ShortTermBankDepositsPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="SpecialTechnologicalPreferredEnterpriseMember" id="allt_SpecialTechnologicalPreferredEnterpriseMember" type="dtr-types:domainItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxAssetsValuationAllowanceAsResultOfTaxRateOfPreviousYears" id="allt_TaxAssetsValuationAllowanceAsResultOfTaxRateOfPreviousYears" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit"/>
  <element name="TaxBenefitPeriod" id="allt_TaxBenefitPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxesOnIncomeLineItems" id="allt_TaxesOnIncomeLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TaxesOnIncomeTable" id="allt_TaxesOnIncomeTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" nillable="true"/>
  <element name="TaxExemptPeriod" id="allt_TaxExemptPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TreasuryStockPolicyTextBlock" id="allt_TreasuryStockPolicyTextBlock" type="dtr-types:textBlockItemType" abstract="false" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TreasuryStockShare" id="allt_TreasuryStockShare" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TwoThousandSixStockOptionPlanMember" id="allt_TwoThousandSixStockOptionPlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
  <element name="TwoThousandSixteenPlanMember" id="allt_TwoThousandSixteenPlanMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" nillable="true"/>
</schema>
