Nt8D18 Network/Dtr Card - Nortel Meridian 1 Replacement Manual

NT8D18 Network/DTR Card

The network/DTR card provides network and peripheral controller functions
along with Digitone receiver capability. Use this procedure to replace a
network/DTR card.
See the X11 Administration (553-3001-311) for a description of all
maintenance commands, and the X11 System Messages Guide
(553-3001-411) for interpreting system messages.
Module covers are not hinged; do not let go of the cover. Lift the cover
away from the module and set it out of your work area.
All services on a loop are interrupted while the loop is disabled.
Removing equipment
1 Check the status of the superloop:
LD 32
STAT 28
— If the response is DSBL for all loops, go to Step 1 on page 174.
— If there are responses other than DSBL, see "LD 32" in the X11
Administration (553-3001-311) for an interpretation.
2 Set the ENB/DIS switch to DIS.
3 Unhook the locking devices on the card; pull it out of the card cage.
Replacing equipment
WARNING
CAUTION
the superloop must be loops 28–31
Page 173 of 362
Hardware replacement