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363-206-285
Issue 2, February 2000
Table A – Minor Alarm Conditions (Continued)
Alarm Level or
LED Indication
Trouble Description (Note)
MN LED lighted.
section DCC channel failed
Flashing FAULT
LED on OHCTL
CP
MN LED lighted.
OHCTL standby boot fail
FAULT LED
SYSCTL standby boot fail
lighted on
affected circuit
pack.
unexpected CP switches
unexpected CP type
Note: Similar descriptions of trouble may also appear in the CIT alarm and status report.
*
May be provisioned for Critical, Major, Minor or no alarm.
†
May be provisioned for Major, Minor or no alarm.
6.
Is a FAULT LED lighted or flashing on an OLIU circuit pack?
If YES, then do TAP-111 if linear extension.
Do TAP-119 if ring configuration.
If NO, then continue with Step 7.
7.
Is the FAULT LED lighted (not flashing) on the faceplate of one and only one
circuit pack of the DDM-2000?
If YES, then continue with Step 8.
If NO, then proceed to Step 11.
DDM-2000 OC-3 M
Trouble Clearing:
Likely causes
SYSCTL CP failure, reset, or
initialization at far end. SYSCTL
CP removed from a site. Program
installation in progress or failed at
far end. SYSCTL or OHCTL CP
failed at near end or removed at
far end. OLIU CP or fiber failure
between this node and node
connected to the source address
(no communication with other
end).
SYSCTL or OHCTL CP failed
during local or remote software
download.
Switch settings invalid, different
from other circuit pack, or different
than they were before circuit pack
was removed or replaced. Circuit
pack inserted into slot provisioned
for different circuit pack.
ULTIPLEXER
TAP-112
Page 8 of 16
Step or Procedure
Step 42
Replace SYSCTL or
OHCTL CP and try
software download
again or download a
compatible version
of software.
Step 31
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