FILTER
A facility offered to a manager/secretary pair, allowing calls to the manager to be intercepted by one or more secretaries.
H OLD
A facility which allows you to keep a caller on hold while you perform a second operation, and then pick up the call again on the same terminal.
H UNT GROUP
A set of terminals which all have the same number in the phone book. A caller to this number will get whichever of the terminals in the group is free.
INTRUSION
A facility which allows you to interrupt a call between two other people (at least one of whom is internal).
ISDN
Integrated Services Digital Network.
LINE K EY
A key which gives access to a telephone line.
MANAGER/ SECRETARY
The range of special services such as filtering, forwarding, etc., between a manager's set and his secretary's.
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