Nortel Networks 1000 - Manual (Page 407)

Maintenance 407
Isolate MSDL faults using the diagnostic tools described below:
Step Action
1 Observe and list the problem symptoms; for example, a typical
symptom is a permanently lit LED.
2 If the LED flashes three times but the card does not enable,
verify that the card is installed in a proper slot.
3 Check that the address is unique; no other card in the system
can be physically set to the same device number as the MSDL.
4 If installation is correct and no address conflict exists, refer
to
“Newly installed MSDL cards” (page 407) or “Previously
operating MSDL cards” (page 407) .
5 If the MSDL still does not operate correctly, contact your Nortel
representative.
--End--
Newly installed MSDL cards
Problems that occur during MSDL card installation usually result from
improperly installed, incorrectly addressed, or faulty cards.
If the LED on a newly installed MSDL does not flash three times after
insertion, wait 5 minutes, then remove and reinsert. If the LED still does
not flash three times, the card is faulty.
Previously operating MSDL cards
Problems that occur during normal operation usually result from faulty
cards. Follow these steps to evaluate the situation:
Step Action
1 Use the STAT MSDL x command to check MSDL card status.
See “Displaying MSDL status” (page 406) .
2 If the card has been manually disabled, try to enable it using ENL
MSDL x . “Enabling the MSDL” (page 406) If this fails, perform
self-testing as described in step 4.
3 If the card has been disabled by the system, disable it manually
with
DIS MSDL x . "Table" (page 161)
4 Invoke self-testing with the SLFT MSDL x command. “Self-testing
the MSDL” (page 406) If self-tests fail, replace the card. If
self-tests pass, try to enable the card again, as in step 2. If the
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.