Advanced Troubleshooting Procedures; Powering Up The Rlcm - Nortel DMS-100 Series Maintenance Manual

Advanced troubleshooting procedures

Under normal conditions, the user busies and tests a defective unit. As a
result of this test, the MAP terminal displays a list of cards. The card at the
top of the list is often the cause of the problem. When you replace the
problem card, test the defective unit again. If the unit passes this test, the
unit returns to service (RTS) and the troubleshooting procedure is complete.
If normal troubleshooting procedures do not restore a unit to service,
advanced troubleshooting procedures can be necessary. Experienced
operating company personnel, can use MAP terminal responses from
troubleshooting attempts that are not successful to formulate a maintenance
plan. Operating company personnel can repair the fault with more advanced
step-action procedures also.

Powering up the RLCM

Anticipate a power outage when a natural disaster is about to occur. An
anticipated power outage can require operating company personnel to power
down the Remote Line Concentrating Module (RLCM) for the duration of
the event. This action minimizes damage to the equipment and allows the
operating company to bring the power back up in an ordered fashion. This
section describes these procedures.
To power up the RLCM, perform the following steps:
1 Post the RLCM from the MAP terminal.
2 At the remote site, set the switch on the power converter to the ON
3 While you hold in the reset button on the power converter, flip the
4 Busy both LCM units.
position.
appropriate circuit breaker up. Do not hold the circuit breaker up. If you
apply power to the RLCM, the circuit breaker stays in the ON position.
If a problem is present with the power, the circuit breaker trips back
down to the OFF position.
Note: Repeat steps 2 and 3 for the other line concentrating module
(LCM) unit.
DMS-100 Family RLCM Maintenance Manual XPM12 and up
12-1