Lucent DDM-2000 OC-3 User And Service Manual page 692

363-206-285
Issue 2, February 2000
Table A – Minor Alarm Conditions (Continued)
Alarm Level or
LED Indication Trouble Description (Note)
MN LED lighted.
inc. OC3 LOS
FAULT LED
inc. OC3 LOF
flashing on OLIU
inc. OC3 sig degrade (BER)
CP
inc. OC3 sig failed (BER)
inc. STS1 LOP OC3 slotaid
inc. OC12 LOS
inc. OC12 LOF
inc. OC12 sig degrade (BER)
inc. OC12 sig failed (BER)
inc. STS1 LOP OC3 slotaid
inc. STS1 LOP OC12 slotaid
MN LED lighted.
inc. OC3 line AIS
inc. OC12 line AIS
MN LED lighted.
inc. EC1 sig failed (BER)
FAULT LED
inc. EC1 LOF
flashing on
inc. STS1 LOP EC1
STS1E CP
inc. EC1 LOS
inc. EC1 sig degrade (BER)
inc. EC1 line AIS
See notes/footnotes at the end of this table.
*
*
*
*
*
*
*
DDM-2000 OC-3 M
Trouble Clearing:
Likely causes
Failure of OLIU CP at near or far
end, or failure of receive fiber.
If failure on both OC-3 lines:
unprotected removal or failure of
MXRVO or DS3 CP at far end.
If failure on only one OC-3 line:
Failure of OLIU CP at near or far
end.
Failure of OLIU CP at near or far
end, or failure of receive fiber.
If failure on both OC-3 lines:
unprotected removal or failure of
MXRVO or DS3 CP at far end.
If failure on only one OC-3 line:
Failure of OLIU CP at near or far
end.
If failure on both OC-12 lines:
unprotected removal or failure of
MXRVO or DS3 CP at far end.
If failure on only one OC-12 line:
Failure of OLIU CP at near or far
end.
Failure of OLIU CP at far end.
Failure of STS1E CP at near or far
end, or failure of receive fiber.
ULTIPLEXER
TAP-112
Page 6 of 16
Step or Procedure
TAP-111
(linear, 1+1)
TAP-119
(ring, 0X1)
Step 38
TAP-111
(linear, 1+1)
TAP-119
(ring, 0X1)
TAP-119
(ring, 0X1)
Step 38
TAP-111
(linear, 1+1)
TAP-119
(ring, 0X1)
Step 38
TAP-119
(ring, 0X1)
Step 53
Step 15