Avaya S8700 Series, Maintenance Manual

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Maintenance-Object Repair Procedures
555-233-143 8-1494 Issue 1 May 2002
Procedure 2: If either of the two patterns described before are present, then the
clock signal between active SNC and 2 Adjacent SNIs is suspect. Proceed
through the following steps until the problem is resolved:
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 executing set switch-node-clock
UUCSS with the standby SNC’s location.
b. If the problem persists, switch back to the previously active SNC via
the set switch-node-clock command and go to step 2 below.
c. If the problem went away, replace the SNC that was previously
active. Then set the newly replaced SNC to active. If the problem
returns, assume that the SNC that was just replaced was not at fault
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. This could indicate a problem with the switch-node-carrier backplane.
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below when inspecting
errors in the system. For example, by clearing error codes associated with the
Configuration audit (#759), you may also clear errors generated from other tests
in the testing sequence.
For descriptions of these tests, see ‘‘SNI-BD (SNI Circuit Pack)’’ .
Order of Investigation
Short Test
Sequence Long Test
Sequence Reset Board
Sequence
D/ND
1
1. D = Destructive, ND = Nondestructive
Configuration audit (#759) X X ND
Failure audit (#777) X X ND
Fiber Out of Frame query (#989) X X ND
Packet Neighbor test (#767) X X ND
Circuit Path test (#755) X X ND
Destructive Facility test (#757) X D
Off-board Destructive Facility test
(#756) X D
Switch Node Interface Reset test
(#761) X D