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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Packet Bus Fault Isolation and Correction
Page 9-30Packet Bus Fault Correction
9
1. Power down the control carrier. Refer to the ‘‘Removing Power’’ section in
Chapter 5, ‘‘
Routine Maintenance Procedures’’.
2. Remove the suspect circuit pack.
3. As in Procedure 2, determine if the backplane pins in the removed circuit
pack’s slot are bent.
4. If the backplane pins are bent, do the following:
a. Straighten or replace the pins
b. Insert the same circuit pack
5. If the backplane pins are not bent, replace the circuit pack (reinsert the
circuit pack if a replacement is not available).
6. Turn the power back on to reboot the system. Refer to the ‘‘
Restoring
Power’’ section in Chapter 5, ‘‘Routine Maintenance Procedures’’.
7. Determine if the Packet Bus fault is still present.
8. If the Packet Bus fault is still present, do the following:
a. If the circuit pack was reinserted in Step 5, replace the circuit pack,
and repeat Procedure 3.
b. If the circuit pack was replaced in Step 5, repeat Procedure 3 for
the next processor complex circuit pack.
9. If the Packet Bus fault does not recur, the procedure is completed.
If Procedure 3 fails to identify the cause of the problem, go to Procedure 4.
In a High or Critical Reliability System
, do the following:
1. If the circuit pack to be replaced is in the SPE, perform an SPE
interchange by entering the reset system interchange command. For an
Expansion Interface circuit pack, enter the set exp-link command to
switch to the standby expansion link. For a Tone-Clock circuit pack, enter
the set tone-clock command to switch to the standby Tone-Clock circuit
pack.
2. Remove the newly-inactive suspect circuit pack. For a circuit pack in the
processor complex, use the procedures in Chapter 6, ‘‘
Reliability
Systems: A Maintenance Aid’’.
3. As in Procedure 2, determine if the backplane pins in the removed circuit
pack’s slot are bent.
4. If the pins are bent, do the following:
a. Power down the carrier. Refer to the ‘‘
Removing Power’’ section in
Chapter 5, ‘‘
Routine Maintenance Procedures’’.
b. Straighten or replace the pins.
c. Insert the same circuit pack.