Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285 Trouble Clearing: TAP-102
Issue 2, February 2000 Page 4 of 14
DDM-2000 OC-3 MULTIPLEXER
MAJOR. MJ LED
lighted. FAULT
LED flashing on
TGS/TG3 CP.
inc. DS1 sync. ref. LOS
inc. DS1 sync. ref. LOF
inc. DS1 sync. ref. BER
inc. DS1 sync. ref. AIS
inc. DS1 sync. ref. OOL
inc. DS1 sync. ref. EOOF
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.
Step 10
MAJOR. MJ LED
lighted. FAULT
LED flashing on
DS3 CP.
inc. (from DSX) DS3 LOS
*
inc. (from DSX) DS3 sig fail
*
Equipment failed or signal
removed at DSX-3, unprotected
failure of DS3 CP.
Step 8
MAJOR. MJ LED
lighted. FAULT
LED flashing on
STS1E CP.
inc. EC1 LOS
*
inc. EC1 LOF
*
inc. EC1 sig failed (BER)
*
inc. EC1 sig degrade (BER)
*
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.
Step 8
inc. EC1 line AIS
*
Failure of STS1E CP or
equivalent at far end of EC-1
line.
Step 8
inc. STS1 LOP EC1
*
Failure of the far end STS1E CP
or failure of the STS1E CP at
the near end.
Step 8
MAJOR. MJ LED
lighted.
inc. OC3 line AIS
*
inc. OC12 line AIS
*
Failure of OLIU CP at far end. Step 61
MAJOR. MJ LED
lighted. FAULT
LED flashing on
DS1/DS1PM or
T1EXT CP.
inc. (from DSX) DS1 LOS
†
inc. (from DSX) DS1 sig fail
†
Equipment failed, DSX-1 signal
removed, cross talk in office
wiring, or DS1/DS1PM or
T1EXT CP failed.
Step 6
MAJOR. MJ LED
lighted. FAULT
LED flashing on
IMA LAN CP.
inc. LAN fail (from cust_lan)
inc. LAN fail (from
fiber_lan)
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.
Check cable
interface and
other LAN
terminating
equipment.
inc LAN fail (from sonet) Incoming failure from the
SONETsideintotheIMA LAN
CP.
Use the
rtrv-alm:
command to
check incoming
status alarms.
See notes and footnotes at end of table.
Table A – Major (MJ) Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note) Likely causes
Step or
Procedure

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English