AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 143

Features
Labeling
Trunks
Stations and Calling Groups
4-38 System Features
Planning Form Instructions
On PBX System Form 7c, Night Service - Time Set, write the time of day
you want Night Service truned on and off for each day of the week.
Use 24-hour number, called military time - for example, 5:30 pm = 1730.
If Night Service is to remain on throught the day - for example, on
Sunday - don't enter an on and off time.
Labeling enhances the capability of display telephones used with the system.
Choose the labels to appear on display telephones:
Trunks
Stations and Calling Groups
Posted Message
System Directory/System Speed Dial
Trunk labels identify the trunk being used or the department being called. For
example, when a call comes in on one of the incoming trunks, a number, such
as 5559876, or the name of the department to which it belongs, such as Sales,
is displayed. Used with the AT&T INF02 automatic number identification (ANI)
service, the labels also identify the number of the caller.
Note: The availability of the caller identification information may be limited by
local-serving (caller's) jurisdiction, availability, or central office equipment.
The labels can contain up to seven characters, including capital letters,
numbers, ampersand (&), dash (–), space, colon (:), asterisk (*), and pound
sign (#).
Planning Form Instructions
On PBX System Form 8a, Label Form - Trunks, in the "Label" column:
Write the label for each trunk next to its trunk number.
When the system is first set up, users with display telephones see only the
extension number of the person calling them for inside calls, calling group calls,
transfer returns, and Leave Word Calling messages.
You can associate alphanumeric labels with extension numbers so that both the
name of the caller and the extension number are displayed. For example, you
might assign the label "TERRY" to extension number 20. Then users with display
telephones can see that they have incoming calls from Terry at extension 20 or
that Terry at extension 20 has left "call me" messages. The labels can contain up
to seven letters and/or numbers.