ILEC

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ILEC

(Incumbent Local Exchange Carrier) A traditional local telephone company such as one of the Regional Bell companies (RBOCs). Contrast with CLEC. See ELEC and TELRIC.
References in periodicals archive ?
Because of the operations, the incumbent carrier would only be able to offer the same limits as expiring on the GL/CPL/Professional and Follow-Form Excess policies ($5M) and would not be able to increase these limits at a later time if needed.
Incumbent carriers, led by Continental Airlines, have lobbied hard to keep Virgin America from getting off the ground.
Under the current FCC regulations, competitive local exchange carriers (CLECs) such as Allegiance Telecom and the local divisions of AT&T and MCI, compete with the incumbent carriers by leasing the infrastructure from the incumbent carriers (which include companies like SBC, Verizon and BellSouth), at wholesale prices that are so low that the incumbents claim to lose an average of $9 per line on each one leased.
Especially in the local market, the availability of choice and enhanced services appears stymied as incumbent carriers joust in courtrooms to protect their turf while plotting invasions of others'.