Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 2004 / 2536

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