Telephone exchange service.
Telephone exchange service. A telephone exchange service is:
(1) A service within a telephone exchange, or within a connected system of telephone exchanges within the same exchange area operated to furnish to subscribers intercommunicating service of the character ordinarily furnished by a single exchange, and which is covered by the exchange service charge, or
(2) A comparable service provided through a system of switches, transmission equipment, or other facilities (or combination thereof) by which a subscriber can originate and terminate a telecommunications service.
Source
47 CFR § 51.5
Scoping language
Terms used in this part have the following meanings: