A general classification of trunks carrying toll traffic and ordinarily extending between a local office and a toll office, except trunks classified as tributary circuits. Examples of toll connecting trunks include toll switching trunks, recording trunks, and recording-completing trunks. [47 CFR Pt.36-A]

A system service feature by which users are denied the ability to place toll calls without the assistance of an attendant.

The FCC Order that provided the customer with the ability to retain his Toll-Free Number and move or select carrier(s) of choice to service that same Toll-Free Number.

The entity which subscribes to Toll-Free Service from the Toll-Free Service Provider. This entity defines and manages all final termination points for the Toll-Free Service, and takes ultimate financial responsibility for tariff usage charges resulting from callers dialing the Toll-Free Number. NOTE: The Toll-Free Subscriber definition specifically excludes Toll-Free Service Resellers with respect to all situations of Resold Toll-Free Service… (Read More →)

A central office used primarily for supervising and switching toll traffic. [47 CFR Pt.36-A]

The voice quality resulting from the use of a nominal 4-kHz telephone channel.
Note: Toll quality may be quantized in terms of a specified bit error ratio.

See classmark.

A trunk connecting one or more end offices to a toll center as the first stage of concentration for intertoll traffic.
Note: Operator assistance or participation may be an optional function. In U. S. common carrier telephony service, a toll center designated "Class 4C" is an office where assistance in completing incoming calls is provided in addition to other traffic;… (Read More →)

Any authorized representative of a Toll-Free Subscriber or a Toll-Free Service Provider. The Agent is the entity whom the Toll-Free Subscriber or the Toll-Free Service Provider has contractually authorized to act on its behalf to establish, change, or disconnect Toll-Free Service.

An entity that offers Bundled Service to Toll-Free Subscribers.