Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 551

Procedure 6-34
TEC/DSI PCA Diagnostic
Step Description
27
Enter the following command to switch processors:
>SWACT (cr)
BMC will respond with appropriate switch related messages. If the 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 key switch to the right and release.
28
Verify the status of the TEC/DSI PCAs by entering the following commands.
>DOS S TECMAINT SHOW 1 STATUS (cr)
Example response: MTU B0: CMD-01 STA-82 BLK-3589
>DOS S TECMAINT SHOW 2 STATUS (cr)
Example response: MTU B2: CMD-01 STA-82 BLK-5
If there is no response to either of the above commands, there is a command problem and
you should proceed to step 4. For AMA/MTU related problems, where there are no MTU
messages seen at the terminal, you should look toward the controller in the switching
system. For any other AMA/MTU related problems, when MTU messages have been
seen at the terminal, verify the definition of the CMD (command) and STA (status) fields
using Table 6-8 at the end of this procedure and return to step 12.
29
If the INVALID BLOCK CHECKSUM ERROR or INVALID BLOCK DETECTED messages
were displayed, rotate the AMA ports in the Switching System. If the errors continue, the
data from the Switching System is suspect. Contact the next level of support to investigate
the data being sent from the Switching System to the BMC. If the errors stop, continue
with this procedure.
30
Power down the standby processor by depressing the rocker switch on the power supply
to 0.
31
Reseat the TEC/DSI PCA associated with the MTU port that is experiencing trouble, or
that failed to communicate.
32
After 15 seconds, activate the power supply rocker switch by pressing it toward I.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-113
(Sheet 1 of 4)