
<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                   60,054<F1>
<ALLOWANCES>                                     3,612
<INVENTORY>                                        935
<CURRENT-ASSETS>                                66,083
<PP&E>                                         135,964<F2>
<DEPRECIATION>                                  45,472
<TOTAL-ASSETS>                                 224,754
<CURRENT-LIABILITIES>                           60,000
<BONDS>                                         33,419<F3>
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           268
<OTHER-SE>                                     127,881
<TOTAL-LIABILITY-AND-EQUITY>                   224,754
<SALES>                                        154,677<F4>
<TOTAL-REVENUES>                               172,153
<CGS>                                          102,136<F5>
<TOTAL-COSTS>                                   58,778<F6>
<OTHER-EXPENSES>                                     0<F7>
<LOSS-PROVISION>                                 1,163<F8>
<INTEREST-EXPENSE>                               1,340<F9>
<INCOME-PRETAX>                                  9,710
<INCOME-TAX>                                     1,294
<INCOME-CONTINUING>                              8,416
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,416
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
<FN>
<F1>add back allowance
<F2>gross
<F3>Total long-term debt
<F4>Toll only
<F5>Network costs
<F6>Total operating expenses
<F8>Bad debt expense from consolidated income statement
<F7>Unusual operating expenses
<F9>Net
</FN>
        

</TABLE>
