Lucent DDM-2000 OC-3 User And Service Manual page 610

363-206-285
Issue 2, February 2000
Table A – Critical (CR) Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note)
CRITICAL. CR
inc. (from DSX) DS3 LOS*
LED lighted.
inc. (from DSX) DS3 OOF*
FAULT LED
inc. (from DSX) DS3 sig fail*
flashing on DS3
CP.
CRITICAL. CR
inc. EC1 LOS*
LED lighted.
inc. EC1 LOF*
FAULT LED
inc. EC1 sig failed (BER)*
flashing on
inc. EC1 sig degrade (BER)*
STS1E CP.
inc. EC1 line AIS*
inc. STS1 LOP EC1*
CRITICAL. inc. STS1 AIS*
CR LED lighted.
inc. VT AIS*
inc. STS1 sig failed (BER)
inc. STS1 sig degrade (BER)
invalid CP switches
See notes/footnotes at end of table.
DDM-2000 OC-3 M
Trouble Clearing:
Likely causes
Equipment failed or removed at
DSX-3; DS3 input disconnected
at the DSX-3 or at the
DDM-2000 backplane; an
out-of-frame DS3 signal
incoming to the DSX-3 at the far
end; unprotected failure of DS3
CP at the far end or near end;
DS3 signal looped at both ends.
Failure of incoming EC-1 signal
from STSX, failure of STS1E CP
at the near end, failure of
incoming cable or cable
disconnect at EC-1 STSX
cross-connect point or shelf
connector, cross talk in office
wiring,
Failure of the STS1E CP or
equivalent at other end of EC-1
line.
Failure of the near-end or
far-end STS1E CP.
Incomplete or incorrect
cross-connect provisioning in an
end-to-end network; unprotected
removal or obscure failure of a
DS3, STS1E, MXRVO, or OLIU
CP at the far end; unprotected
optical line failure.
Incomplete or incorrect
cross-connect provisioning in an
end-to-end network; unprotected
removal or failure of a DS1 CP at
the far end.
Failure of OLIU CP at near end
or far end or failure of receive
fiber.
When associated with TIMING
slot, timing mode switch settings
on TGS/TG3 CP are invalid.
ULTIPLEXER
TAP-101
Page 4 of 10
Step or
Procedure
Step 7
Step 7
Step 25
Step 25
TAP-120
TAP-120
TAP-111
(linear, 1+1)
or TAP-119
(ring, 0X1)
Step 14