Nortel 1000E Maintenance Manual page 81

Table 16
MG 1000E fault causes and actions (Part 2 of 3)
Condition
Red LED on circuit card
and system message
LED is red on circuit
card
Two or more units on a
circuit card are disabled
System message
indicating the circuit
card or units on it are
disabled
Common visual
indication and system
messages on
MG 1000E Expander
Multiple cards exhibit
problems
Possible cause
Improperly installed
NTDK83 IP
Daughterboard
Defective NTDK83,
NTDK99 daughterboard
Defective Media
Gateway or Expander
Card circuitry latched
Defective circuit card
Defective NTDK95
Expander cable
Defective Media
Gateway
Clearing faults
Action
Power down the system, remove the
NTDK20 SSC card.
Unseat the daughterboard and then
reseat it.
Reinsert the NTDK20 SSC circuit card.
Power up the system.
Unseat the NTDK20 SSC circuit card
and replace the daughterboard.
Reinsert the NTDK20 SSC circuit card.
Replace the defective Media Gateway or
Expander.
Disable the card, unseat and reseat it,
then re-enable the card.
If the fault persists, go to the next
possible cause.
Enable the circuit card by entering:
LD 32
ENLC l s c u (where l s c u
represents the card number)
If the fault persists, replace the affected
circuit card.
Replace the NTDK95 cable connecting
the MG 1000E to the MG 1000E
Expander.
Replace the Media Gateway.
Communication Server 1000E
Page 81 of 162
Maintenance