TAP-112
: Trouble Clearing 363-206-305
Page 8 of 16 Issue 3, June 2000
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
MINOR.
MN
LED lighted.
inc. STS1 sig. degrade
(BER)
Failure of
OLIU
circuit
pack at some point in
the STS-1 path or failure
of receive fiber.
TAP-111
inc. STS1 sig. failed
(BER)
Failure of the near end
OLIU
circuit pack
reporting the STS-1
failure; failure of the far
end
OLIU
; or failure of
the receive fiber if the
OC-n is also reporting a
failure.
TAP-111
inc. STS1 unequipped An STS-1 cross-connect
has been deleted in
upstream equipment
interfacing with the
DDM-2000 OC-1, OC-3,
or OC-12 ring.
Find the deleted
cross-connect in the
upstream equipment.
inc. VT AIS* Incomplete or incorrect
cross-connect
provisioning in
end-to-end network;
unprotected removal or
failure of
DS1
,
DS1PM
,
or
T1EXT
circuit pack at
far end. In ring
applications; a
non-service affecting VT
AIS alarm message
may result from an
upstream
OLIU
circuit
pack or fiber failure
affecting only one ring
direction. A VT yellow
alarm message is not
returned for a
non-service affecting VT
AIS.
TAP-118
Table A – Minor (MN) Alarm Conditions (Continued)
Alarm Level or
LED Inidication Trouble Description (Note) Likely Causes Step or Procedure
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