Lucent DDM-2000 OC-3 User And Service Manual page 620

363-206-285
Issue 2, February 2000
Table A – Major (MJ) Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note)
MAJOR. MJ LED
inc. DS1 sync. ref. LOS
lighted. FAULT
inc. DS1 sync. ref. LOF
LED flashing on
inc. DS1 sync. ref. BER
TGS/TG3 CP.
inc. DS1 sync. ref. AIS
inc. DS1 sync. ref. OOL
inc. DS1 sync. ref. EOOF
MAJOR. MJ LED
inc. (from DSX) DS3 LOS
lighted. FAULT
inc. (from DSX) DS3 sig fail
LED flashing on
DS3 CP.
MAJOR. MJ LED
inc. EC1 LOS
lighted. FAULT
inc. EC1 LOF
LED flashing on
inc. EC1 sig failed (BER)
STS1E CP.
inc. EC1 sig degrade (BER)
inc. EC1 line AIS
inc. STS1 LOP EC1
MAJOR. MJ LED
inc. OC3 line AIS
lighted.
inc. OC12 line AIS
MAJOR. MJ LED
inc. (from DSX) DS1 LOS
lighted. FAULT
inc. (from DSX) DS1 sig fail
LED flashing on
DS1/DS1PM or
T1EXT CP.
MAJOR. MJ LED
inc. LAN fail (from cust_lan)
lighted. FAULT
inc. LAN fail (from
LED flashing on
fiber_lan)
IMA LAN CP.
inc LAN fail (from sonet)
See notes and footnotes at end of table.
*
*
*
*
*
*
*
*
†
DDM-2000 OC-3 M
Trouble Clearing:
Likely causes
Failure of TGS/TG3 CP at near
or far end, or failure of upstream
timing supply, timing eqpt.,
system set for SF and received
DS1 is ESF.
Equipment failed or signal
*
removed at DSX-3, unprotected
failure of DS3 CP.
Failure of the STS1E or
equivalent CP at near end or far
end of EC-1, failure of the
*
incoming cable, failure of the
STS1E CP at the near end,
cross talk in office wiring, or a
cable disconnect at the EC-1
STSX cross-connect point or
shelf connector.
Failure of STS1E CP or
equivalent at far end of EC-1
line.
Failure of the far end STS1E CP
or failure of the STS1E CP at
the near end.
Failure of OLIU CP at far end.
Equipment failed, DSX-1 signal
removed, cross talk in office
†
wiring, or DS1/DS1PM or
T1EXT CP failed.
Cable disconnected from the
10/100BaseT interface of the
IMA LAN CP. IMA LAN CP not
receiving valid link test pulses
from other LAN terminating
equipment.
Incoming failure from the
SONET side into the IMA LAN
CP.
ULTIPLEXER
TAP-102
Page 4 of 14
Step or
Procedure
Step 10
Step 8
Step 8
Step 8
Step 8
Step 61
Step 6
Check cable
interface and
other LAN
terminating
equipment.
Use the
rtrv-alm:
command to
check incoming
status alarms.