AT&T MERLIN LEGEND Key System Planning page 75

Lines
Channel Service Unit
Setting for T1 Emulation
Primary Rate Interface Facility
See System Reference for more
detailed information.
Planning Form Instructions—Continued
13.
Under the "Signaling Mode" heading of Form 3c, in all the columns that
describe T1 Modules:
Check "RBS" to retain the factory setting of robbed-bit signaling.
Check "CCS" to change the factory setting to common-channel
signaling.
Use these instructions only if the 100D module type of service is T1 and
outside lines are to be emulated.
For loop-start and ground-start emulation with T1, specify whether the type of
equipment provided by the local telephone company central office is foreign
exchange (the factory setting) or special access.
Planning Form Instructions—Continued
14.
Under the "Channel Service Unit" heading of Form 3c, in all columns
that describe T1 Modules used for emulation:
Check "Foriegn Exchange" to retain the factory setting.
Check "Special Access" to change the factory setting.
Use these instructions only if the type of service on the DS1 facility is
ISDN-PRI.
Decide the following options for each ISDN-PRI facility:
Telephone Number
Telephone Number to Send
Test Telephone Number
Timers and Counters
Terminal Equipment Identifier
B-Channel Groups
Note: Because of the complexity of timer, counter, and terminal equipment
identifier information, the factory settings for them should rarely be changed.
Incorrect settings can have an adverse affect on the operation of ISDN-PRI
facilities. Consult with your AT&T representative or authorized dealer when you
plan options for PRI facilities.
Record your decisions about these options in the "ISDN-PRI Facility
Options" section of Key System Form 3
for each 100D module with an ISDN-PRI service type. Record the slot number
(in the "Slot No." blank) at the top of the form(s).
(page 3). Make a copy of the form
C
Line Options
3-21