Nortel Networks Circuit Card 311 - Manual (Page 413)

Maintenance 413
Manually isolating and correcting faults
Problems are due to configuration errors that occur during installation or
hardware faults resulting from component failure during operation. See
"Symptoms and actions" (page 415) for more information on problem
symptoms and required responses.
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 413) or "Previously operating MSDL
cards" (page 413) .
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 412) .
2 If the card has been manually disabled, try to enable it using ENL
MSDL x . "Enabling the MSDL" (page 412) If this fails, perform
self-testing as described in step 4.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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