Nortel Networks 553-3001-211 manual Replacing Msdl cards, Procedure Replacing an Msdl card

NT6D80 MSDL card Page 409 of 894

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 19

Replacing an MSDL card

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

1Log in on the maintenance terminal.

2At the > prompt, type LD 37 (you can also use LD 42, LD 48, or LD 96) and press Enter.

3Type 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.

4Disconnect the cables from the MSDL faceplate connectors.

5Unlatch the card-locking devices, and remove the card from the module.

6Set the switches on the replacement card to match those on the defective card.

7Insert the replacement card into the same card slot.

8Observe 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.

9If 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.

10Connect the cables to the MSDL faceplate connectors.

11At the . prompt in the LD 37 program, type ENL MSDL x ALL and press Enter to enable the MSDL and its operations. If the red LED on the MSDL turns off, the MSDL is functioning correctly. Since self-tests were not invoked, no result message appears.

12Tag the defective card(s) with a description of the problem and return them to your Nortel Networks representative.

End of Procedure

Circuit Card Description and Installation