Toll switching trunk

In telecommunication, a toll switching trunk is a trunk connecting one or more end offices to a toll center as the first stage of concentration for intertoll traffic.

Related Topics:
Telecommunication - Trunk - Traffic

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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; a toll center designated Class 4P is an office where operators handle only outbound calls, or where switching is performed without operator assistance.

Related Topics:
Common carrier - Telephony - Switching

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Source: from Federal Standard 1037C and from MIL-STD-188

Related Topics:
Federal Standard 1037C - MIL-STD-188

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