Primary local exchange carrier or "PLEC" means a carrier to which a customer has presubscribed for local exchange service.
Local Exchange Carrier or "LEC" means any Carrier that is engaged in the provision of telephone Exchange Service or Exchange Access. Such term does not include a Carrier insofar as such Carrier is engaged in the provision of a commercial mobile service under Section 332(c) of the Act, except to the extent that the FCC finds that such service should be included in the definition of such term.
Competitive Local Exchange Carrier (CLEC)” means a telephone company certificated by the Commission to provide local Exchange Service within AT&T-21STATE’s franchised area.
Incumbent Local Exchange Carrier (ILEC) is As Defined in the Act.
Multiple Exchange Carrier Access Billing or “MECAB” means the document prepared by the Billing Committee of the OBF, which functions under the auspices of the Carrier Liaison Committee (CLC) of the Alliance for Telecommunications Industry Solutions (ATIS). The MECAB document, published by ATIS as ATIS/OBF-MECAB- Issue 6, February 1998, contains the recommended guidelines for the billing of access services provided to an IXC by two (2) or more LECs, or by one LEC in two (2) or more states within a single LATA.
Interexchange Carrier (IXC) means a carrier that provides, directly or indirectly, InterLATA or IntraLATA Telephone Toll Services.
Interexchange Carrier or "IXC" means a Carrier that provides InterLATA or IntraLATA Toll services.
Local Exchange Routing Guide (LERG) is a Telcordia Reference document used by Telecommunications Carriers to identify NPA-NXX routing and homing information as well as Network element and equipment designations.
Integrated Digital Loop Carrier means a subscriber loop carrier system that is twenty-four (24) local Loop transmission paths combined into a 1.544 Mbps digital signal which integrates within the switch at a DS1 level.
Local exchange service means local switched telecommunications service within any local exchange service area approved by the state corporation commission, regardless of the medium by which the local telecommunications service is provided. The term local exchange service shall not include wireless communication services.
Applicable Exchange means the New York Stock Exchange or such other securities exchange as may at the applicable time be the principal market for the Common Stock.
Interconnection Activation Date means the date that the construction of the joint facility Interconnection arrangement has been completed, trunk groups have been established, joint trunk testing is completed and trunks have been mutually accepted by the Parties.
Primary dose monitoring system means a system which will monitor the useful beam during irradiation and which will terminate irradiation when a pre-selected number of dose monitor units have been delivered.