Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 553

Procedure 6-34
TEC/DSI PCA Diagnostic
Step Description
39
Verify AMA/MTU port function in the Switching System.
• Are they both up?
• Which port is active?
• Can block count increase be seen at TEC/DSI PCA when TECMAINT SHOW 1 or 2
STATUS is queried?
• If both ports are up, rotate them and verify block collection for other MTU port.
If no problems are encountered, this procedure is complete. If there are errors seen, and
TEC/DSI PCA has NOT been changed previously, proceed to step 14. If there are any
errors seen, and TEC/DSI PCA has been changed previously, proceed to step 20. If there
are any errors seen, and TEC/DSI and CPU PCAs have been changed, call your next
level of support.
40
Enter the following command to switch away from the processor with suspect TEC/DSI
PCAs:
>SWACT (cr)
BMC will respond with appropriate switch related messages. If there are no responses or
processors do not switch, depress the A/B rocker switch to match the standby processor.
Depress the O/P rocker switch to O. Turn the keyswitch to the right and release.
41
Power down standby processor by depressing the rocker switch on power supply to 0.
42
Reverse the TEC/DSI PCAs using the following steps.
Note: Incorrect switch settings can cause a loss of AMA. Refer to the TEC/DSI PCA switch
setting table in the Hardware Replacement subsection.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-115
(Sheet 3 of 4)