Lucent DDM-2000 OC-3 User And Service Manual page 621

TAP-102
:Trouble Clearing
Page 5 of 14
Table A – Major (MJ) Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note)
MAJOR. MJ LED
DS1 CP failed
lighted. FAULT
DS1PM CP failed
LED lighted on
CP.
SYSCTL CP failed
OHCTL CP failed
LAN CP failed
MAJOR. MJ LED
CP removed
lighted.
excessive holdover
inc. STS1 AIS
inc. VT AIS
inc. VT LOP
inc. VT sig degrade (BER)
inc. VT unequipped
See notes and footnotes at end of table.
*
*
DDM-2000 OC-3 M
Issue 2, February 2000
Likely causes
Two service DS1/DS1PM CPs
failed. Unprotected service
DS1/DS1PM CP failure.
Internal circuit pack failure
Internal circuit pack failure
Internal circuit pack failure
Circuit packs removed without
doing upd command to remove
circuit packs from equipment
list.
System has been in holdover
mode for more than 4 hours
because of timing ref. fail or
manual switch.
Incomplete or incorrect
cross-connect provisioning in
end-to-end network. In ring
applications, unprotected
removal or failure of DS3,
MXRVO, or STS1E CP at far
end; fiber or OLIU CP failure.
Incomplete or incorrect
cross-connect provisioning in
end-to-end network. In ring
applications, unprotected
removal or failure of
DS1/DS1PM CP at far end; fiber
or OLIU CP failure.
Unprotected failure of
DS1/DS1PM or MXRVO CP at
near end or far end.
An OLIU CP failure, or a fiber
failure at some point on the
failed ring.
VT1.5 cross-connects have
been deleted in upstream
equipment interfacing with the
DDM-2000 OC-3 ring.
ULTIPLEXER
363-206-285
Step or
Procedure
Step 45
Step 29
Step 36
Replace failed
CP [DLP-523]
Perform upd
command to
remove circuit
packs from
equipment list.
Check timing
ref., check state
of eqpt.
(rtrv-state-
eqpt:)
TAP-120
TAP-120
Replace failed
CP [DLP-523]
TAP-119
Find the deleted
cross-connects
in the upstream
equipment.