Troubleshooting Rts Failure - Nortel DMS-100 Series Maintenance Manual

12-6 Advanced troubleshooting procedures
Table 12-1
DMS-X control byte
MIS
SOM
PACK
NACK
EOM
ESC

Troubleshooting RTS failure

Enter the command string RTS FORCE if the OPM fails to RTS. The RTS
FORCE procedure is as follows:
1. Check logutil for RTS failure reasons.
2. Replace any cards on the card list displayed at the MAP level or in the
297-8361-550 Standard 04.01 September 2000
problem. If all actions are correct, proceed to step o.Item o, "At the
remote, loop back the link to test toward the host." on page 12-6
o. At the remote, loop back the link to test toward the host.
p. When the span loops back, verify the values equal one of the
following DMS-X control byte values. The normal value is #1E.
If the values are the same as the preceding values, the link functions.
If values are different than the preceding values, the link or host
equipment is defective.
If the values are correct, remove loopback, verify values equal #FF,
and reseat DS-1 interface card.
If the values are not correct, check loopback again to verify correct
loop. Troubleshoot the link or switch the link with nonmessaging
link at both ends. Verify if the hex values are correct.
q. Enter <* * mp>.
r. Enter <quit>.
s. Check for bent pins behind the 6X51, 6X52, 6X53, 6X73, and 6X50
cards. Verify the connector on slot 5 of each shelf on the backplane
is tight.
t. If the OPM fails to load, SWACT the line group controller (LGC).
Contact the next level of support.
logs.
Value Meaning
#8D May I send
#4B Start of message
#1E Positive acknowledgment
#55 Negative acknowledgment
#4B End of message
#4B Escape character