SNI-BD (SNI Circuit Pack)
Issue 1 May 2002
8-1441555-233-143
Procedure 1 (suspect TPN link or clock generation out of lock
problem):
1. Enter display alarms and display errors and follow the procedures
for any on-board SNI-BD error and alarm entries.
2. If more than one SNI circuit pack in the same switch node carrier
has SNI-BD error 769 with an off board alarm, replace the active
SNC in the same carrier.
3. Replace this SNI.
4. Replace the active SNC in the same carrier.
Procedure 2 (suspect clock generation out of lock problem):
1. If only one SNC exists in this switch node carrier, replace the SNC.
If two SNCs exist in this switch node carrier, perform the following
steps:
a. Set the standby SNC to active by running the set
switch-node-clock UUCSS command with the standby
SNC’s location.
b. If the problem goes away, replace the SNC that was
previously active. Then set the SNC that was just replaced to
active via the set switch-node-clock UUCSS command. If
the problem returns, assume that the SNC that was just
replaced was not at fault and go to step 2 below.
c. If the problem persists, switch back to the previously active
SNC via the set switch-node-clock command and go to
step 2 below.
2. Replace the leftmost SNI from the pair of adjacent SNIs.
3. Replace the rightmost SNI from the pair of adjacent SNIs.
4. If none of the above steps cleared this error, this could be a switch
node carrier backplane problem.
h. This error indicates a failure communicating synchronization control data
over the fiber link.
If the error is logged as an on-board error:
1. Replace the SNI circuit pack.
If the error is logged as an off-board error:
1. Enter display errors and follow the associated repair
procedures for FIBER-LK errors.
2. Replace the SNI with this error.
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