Nortel 1000E Maintenance Manual page 93

Table 21
MG 1000T Expansion fault causes and actions (Part 3 of 4)
Condition
Red LED 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 1000T Expander
Multiple cards exhibit
problems
Nortel Networks logo is
not lit or fan is not
running
Possible cause
Defective Media
Gateway or Expander
Defective circuit card
Defective NTDK95
Expander cable
Defective Media
Gateway
Defective Media
Gateway
Clearing faults
Action
Replace the defective Media Gateway or
Expander.
Enable the circuit card by entering:
LD 32
ENLC c (where c represents the card
number)
Test the card by entering:
LD 30
UNTT c (where c represents the card
number).
If the fault persists, replace the affected
circuit card.
Replace the NTDK95 cable connecting
the MG 1000T Expansion to the
MG 1000T Expander.
Replace the Media Gateway.
Enable and test the cards by entering:
LD 30
TEST
Replace the Media Gateway
Communication Server 1000E
Page 93 of 162
Maintenance