AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 81

Trunks
Telephone Number to Send
Test Telephone Number
See 'B-Channel Groups" in this chapter.
Terminal Equipment
Identifier
3-26 Trunk Options
If your company subscribes to the AT&T lNF02 automatic number identification
(ANI) service, you can assign the telephone number the system sends to the
network when outgoing calls are made on ISDN-PRI facilities. If the person
being called also subscribes to the same identification service, the telephone
number sent identifies who is calling.
The factory setting is that no telephone number to send is assigned. If you
assign a telephone number to send, it does not have to be unique since the
number is used only for identification and not for routing. The number assigned
can be up to 12 digits.
Note: The availability of the caller identification information may be limited by
local-serving (caller's) jurisdiction, availability, or central office equipment.
Planning Form Instructions
For all the channels you plan to assign a telephone number to send:
1.
If you have not done so already, transfer the information from the "Trunk
Type" column of PBX System Form 2c, System Numbering - Trunk
Jacks to Form 3c on page 3. Write the logical ID and trunk number in the
application column.
2 .
Write the 12-digit telephone number that identifies your company as the
caller in the "Telephone Number to Send" column on Form 3c on page 3.
For each 100D module with an ISDN-PRI service type, you can assign a test
telephone number that is used for maintenance by the service provider.
The factory setting is that a test telephone number is not assigned. The number
you assign must be the same number as that furnished by the ISDN-PRI service
provider. When you assign a test telephone number, it must be different from the
numbers assigned to other channels assigned to the same B-channel group.
Planning Form Instructions
Next to the heading "Test Telephone Number" on Form 3c on page 3, write
the 12-digit test telephone number used for maintenance.
The terminal equipment identifier (TEI) is used by the network to identify a piece
of equipment connected to each D channel. Normally only one is connected,
and the network assumes its terminal identifier is O (the factory setting). You can
change the value to from 1 to 63.
CAUTION
Consult your AT&T representative or authorized dealer before changing the
value. It is not likely that you will ever need to change the factory setting.