AT&T MERLIN LEGEND Key System Planning page 77

Lines
Test Telephone Number
See "B-Channel Groups" later in this
chapter.
Terminal Equipment
Identifier
Timers and Counters
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 6-channel group.
Planning Form Instructions
Next to the heading "Test Telephone Number" on page 3 of Form 3c, write
the 12-digit test telephone number used for maintenance.
The terminal equipment identifier (TEl) 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 0 (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.
Planninfg Form Instructions
Under the "Terminal Equipment Identifier (TEI)" heading on Form 3c:
1.
Check "0" to keep the factory-set TEI.
2 .
To change the factory-set TEI from 0, write a value from 1 to 63 in the
space provided.
Timers and counters are used to ensure that the system takes the appropriate
corrective action when no response is received from the network before the
programmed settings have expired.
C A U T I O N
Since incorrect settings could have an adverse effect on the operation of
ISDN-PRI facilities, consult your AT&T representative or authorized dealer
before you make any changes. The factory-set thresholds are standard
settings and should rarely be changed.
The timers and counters, descriptions, factory settings, and allowable
thresholds are shown in Table 3-5.
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Line Options