AT&T Voice Terminal 8510T - Manual (Page 26)

System Manager The person responsible for specifying and managing the
operation of features for all the voice and data equipment in your network.
trunk A telecommunications channel between your DEFINITY Generic 1 or
Generic 3 and the local or long distance calling network. Trunks of the same kind
connecting to the same end points are assigned to the same trunk group.
trunk code A dial code of 1, 2, or 3 digits that you dial to access a trunk group to
place an outside call.
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