Lucent Technologies DDM-2000 OC-3 User Manual

TAP-112 : Trouble Clearing 363-206-285
Page 5 of 16 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
MN LED lighted.
LEDs lighted on
fan shelf
fan shelf failed Fan filter needs replacing. Fan
pack failed. Fan shelf control
board failed. Fan power feeder
failed.
The fan must be repaired within 4
hours, otherwise service
interruption may occur.
TAP-118
MN LED lighted.
FAULT LED
lighted on circuit
pack.
illegal CP type An illegal or unknown circuit pack
type has been inserted into the
shelf.
Remove CP and
install correct CP.
MN LED lighted.
FAULT LED
flashing on DS1
or T1EXT CP
inc. (from DSX) DS1 LOS
†
inc. (from DSX) DS1 sig
fail
†
Equipment failed or removed at
DSX-1
Step 13
MN 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
inc. DS1 sync. ref. OOL
Failure of incoming sync. ref.
signal. TGS/TG3 CP provisioned
for wrong frame format (SF or
ESF).
Step 17
MN LED lighted.
FAULT LED
flashing on DS3
CP
inc. (from DSX) DS3 LOS
*
inc. (from DSX) DS3 sig.
fail
*
Equipment failed or removed at
DSX-3
Step 15
MN LED lighted.
FAULT LED
flashing on OLIU
CP
inc. OC1 loss of signal
(LOS)
inc. OC1 LOF
inc. OC1 sig degrade (BER)
inc. OC1 sig failed (BER)
Failure of OLIU CP at near or far
end, or failure of receive fiber.
TAP-119
(ring, 0X1)
inc. STS1 LOP OC1 slotaid If failure on both OC-1 lines:
unprotected removal or failure of
MXRVO or DS3 CP at far end.
Step 38
If failure on only one OC-1 line:
Failure of OLIU CP at near or far
end.
TAP-119
(ring, 0X1)
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

Lucent Technologies DDM-2000 OC-3 Specifications

General

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