Nortel Meridian 1 Replacement Manual page 42

Page 42 of 362 Replacing equipment
553-3001-520 Standard 16.00 April 2000
Service is interrupted when a loop is disabled.
Removing equipment
1 Software disable the Dual Loop Peripheral Buffer by entering
LD 32
DISS l s
("l s" represents loop and shelf number)
2 Remove the Backplane access plate at the rear of the UEM by removing
the screws on each side. Set the plate aside.
3 Tag and disconnect cables to the card you are removing.
4 Unhook the locking devices on the card; pull it out of the card cage.
Installing equipment
1 Set option switches on the replacement card the same as on the card you
removed.
To check switch settings, see Circuit pack installation and testing
(553-Circuit Card: Installation and Testing (553-3001-211)) in the SL-1
installation and maintenance guide.
2 Insert the replacement card into the vacated slot and hook the locking
devices.
3 Connect cables to the replacement card.
4 Position the backplane access plate. Replace the screws.
5 Software enable each loop on the card by entering
ENLS l s
6 End the session in LD 32 by entering
****
7 Test each loop on the card by entering
LD 30
LOOP l
If there is a problem, an NWS system message will be produced and the
appropriate red LED will light on the faceplate of the card.
CAUTION