Ntbk51Aa Downloadable D-Channel Daughterboard; Removing The Ddch Daughterboard - Nortel Meridian 1 Hardware Replacement Manual

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NTBK51AA Downloadable D-Channel Daughterboard

Removing the DDCH Daughterboard

553-3001-520 Standard 17.00 January 2002
Replacing equipment
3 End the session in LD 32 by entering
****
4 Test the 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.
5 End the session in LD 30 by entering
****
6 Tag defective equipment with a description of the problem and
package it for return to a repair center.
Use this procedure to replace the Downloadable D-Channel Daughterboard
(DDCH).
See Administration (553-3001-311) for a description of all maintenance
commands, and System Messages Guide (553-3001-411) for interpreting
system messages.
DANGER
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.
CAUTION WITH ESDS DEVICES
The static discharge bracelet located inside the
cabinet must be worn before handling circuit cards.
Failure to wear the bracelet can result in damage to
the circuit cards.
1 The DDCH can only be removed when it is disabled in software.
2 Both ports of the associated DDP circuit card must be disabled.