Nortel 1000E Maintenance Manual page 91

Clearing MG 1000T Expansion faults
Table 21
MG 1000T Expansion fault causes and actions (Part 1 of 4)
Condition
Software does not load
Layer 7 LED is Red
Link LED is off or
flickering
Table 21 provides additional instructions for isolating faults in an MG 1000T
Expansion. Initial indicators can be red LEDs on the circuit cards or a system
message indicating a circuit card or units on it are disabled. Look up all
system messages in the Software Input/Output: System Messages
(553-3001-411) and follow the instructions given.
Possible cause
Improper Security
Device
Defective NTDU0606,
NTTK34, or CAT5 IP
cable
Clearing faults
Action
Positively identify the NT SDID on the
MG 1000T Expansion (eight digits
engraved on the face of the Security
Device beneath the Nortel Networks
logo). Verify that it matches the NT SDID
contained on the MG 1000T Core
Security Device.
Inspect the cable connections visually
and check them physically. Replace
defective cables as required.
Communication Server 1000E
Page 91 of 162
Maintenance