Nortel Networks 311 User Manual

414

NT6D80 MSDL card

If the card has been disabled by the system, disable it manually
with

DIS MSDL x

Table

Invoke self-testing with the

SLFT MSDL x

command.

"Self-testing

the MSDL" (page 412)

If self-tests fail, replace the card. If self-tests

pass, try to enable the card again, as in step 2. If the card does
not enable, note the message output to the TTY and follow the
recommended action.

—End—

Replacing MSDL cards

After completing MSDL troubleshooting you may determine that one or
more MSDL cards are defective. Remove the defective cards and replace
them with new ones.

Procedure 20

Replacing an MSDL card

Step

Action

An MSDL card can be removed from and inserted into a system module
without turning off the power to the module. Follow these steps:

At the > prompt, type

LD 37

(you can also use LD 42, LD 48, or

LD 96) and press Enter.

Type

DIS MSDL x ALL

and press Enter to disable the MSDL and

any active operations running on one or more of its ports. The MSDL
card is now disabled.

Disconnect the cables from the MSDL faceplate connectors.

Unlatch the card-locking devices, and remove the card from the
module.

Set the switches on the replacement card to match those on the
defective card.

Insert the replacement card into the same card slot.

Observe the red LED on the front panel during self-test. If it flashes
three times and stays on, it has passed the test. Go to step 8.

If it does not flash three times and then stay on, it has failed the test.
Pull the MSDL partially out of the module and reinsert it firmly into the
module. If the problem persists, troubleshoot or replace the MSDL.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008