Timers - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

Selecting Line/Trunk Options
Enter the slot and/or DSL number (BRI only) under "Primary Clock
Synchronization."
Under the "Source" subheading, check "Loop" to indicate that the
system uses the clock of the far-end connection (factory setting) or
"Local" to indicate the clock is free-running (100D modules only).
NOTE:
The only option for a 800 NI-BRI module is loop, which is
automatically assigned and is not administrable.
2. If assigning secondary or tertiary backup synchronization:
Enter the slot and DSL number (BRI only) under "Secondary Clock
Synchronization" and/or "Tertiary Clock Synchronization."
Under the "Source" subheading in each column, check "Loop" to
indicate that the system uses the clock of the far-end connection
(factory setting) or "Local" to indicate the clock is free-running (100D
modules only).
NOTE:
The only option for a 800 NI-BRI module is loop, which is
automatically assigned and is not administrable.

Timers

Timers ensure that the system takes the appropriate corrective action when the
expected response is not received from the network during normal operation.
!
CAUTION:
Since incorrect settings can hinder the operation of BRI facilities, consult
with an AT&T representative or authorized dealer before making changes.
The factory-set thresholds are standard settings and should rarely be
changed.
The timers, descriptions, factory settings, and allowable thresholds are shown in
Table 3-5.
Planning Form Instructions
On Form 3i, Incoming Trunks: BRI Options (800 NI-BRI Module), under the
"Timers and Counters" heading on page 2:
1. For each timer:
3–44
Lines/Trunks
To keep the factory setting, check the first box under the timer
name.
To change the factory setting, check the second box under the
timer name and write the new threshold in the space provided.