Nortel 1000E Maintenance Manual page 87

Table 26
MG 1000E fault causes and actions (cont'd.)
Condition
Common visual indication
and system messages on
MG 1000E Expander
Degradation of quality, such
as noise issues in the MG
1000E Expander.
Multiple cards exhibit
problems
Nortel logo is not lit or fan is
not running
MG 1000E constantly
rebooting
Red LED on SSC card and
system messages
Media quality has
deteriorated
Intermittent trunk or line
problems
Multiple system messages
about this MG 1000E
Possible cause
Defective NTDK95
Expander cable
Incorrectly connected
NTDK95 Expander cable
Defective Media Gateway
Loss of AC power Defective
Media Gateway
Defective SSC card
or Media Gateway or
Expander
Defective IP Links
Defective NTDK83 IP
daughterboard in MG
1000E
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 02.07 22 December 2009
Copyright © 2004-2009 Nortel Networks. All Rights Reserved.
Clearing MG 1000E faults 87
Action
Replace the NTDK95 cable
connecting the MG 1000E to the
MG 1000E Expander.
The NTDK95 cable is a uni-directional
cable with a ferrite bead at one
end that you must terminate on the
expansion chassis end. The NTDK95
cable direction can be identified by
the label on the cable. This label must
be installed at the expansion chassis
end.
An incorrectly connected cable can
cause site quality degradation, such
as noise issues in the Expander.
Replace the Media Gateway.
Restore AC power.
Replace the Media Gateway.
Replace the SSC card, Media
Gateway, or Expander.
View the status of the IP links by
entering:
LD 135
STAT IPL x (x is the number for the
MG 1000E, 1 through 128)
Enable the MG 1000E by entering:
LD 32
ENLS l s (where l s are the MG
1000E loop and shelf numbers)
If the fault remains, go to the next
possible cause.
Disable the MG 1000E by entering:
LD 32
DISS l s (where l s are the MG
1000E loop and shelf number)
Replace the IP daughterboard on the
NTDK20 SSC circuit card.