AT&T 7401 Plus User Manual page 27

switchhook The button under the handset in the cradle of the voice terminal.
system list One of the 4 types of Abbreviated Dialing lists; programmable only by
the System Manager. Contains telephone numbers helpful to all system users, and
stores each of those numbers as a 2-digit list item.
System Manager
of features for all the voice and data equipment in your network.
trunk A telecommunications channel between your switch and the public network.
Trunks of the same kind connecting to the same end points are assigned to the same
trunk group.
A dial code of 1, 2, or 3 digits which you dial to access a trunk group to
trunk code
place an outside call.
voice terminal A telephone equipped with an array of specifically designed features
(for example, Feature button, Message light, etc.) and functional capabilities that
distinguish it from a conventional telephone.
The person responsible for specifying and managing the operation
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