Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 125

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
3 Lines/Trunks
Selecting Line/Trunk Options
Planning Form Instructions
Refer to Form 1, System Planning, Control Unit Diagram. Complete the following
information on Form 3i, Incoming Trunks: BRI Options (800 NI-BRI Module),
page 2:
1. To keep the factory setting (the first slot and port found in the system
provides synchronization for the system) or if assigning a different module
to provide primary clock synchronization:
2. If assigning secondary or tertiary backup synchronization:
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: CAUTION:
Since incorrect settings can hinder the operation of BRI facilities, consult
with an Lucent Technologies 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.
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.
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.
3
Issue 1
June 1997
Page 3-43