363-206-305 Trouble Clearing:
TAP-102
Issue 3, June 2000 Page 7 of 14
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
MAJOR.
MJ
LED
lighted.
inconsistent DCC
values
The Network Side/User Side
parameters are set the same at both
ends of a DCC (optical span).
Use
rtrv-fecom
command to
check Network Side/User Side
parameters at each shelf in the
network. Use
set-fecom
command to change Network
Side/User Side parameters at one
end of optical span.
frequency error The alarm condition indicates that
the frequency of an incoming OC-1,
OC-3, or OC-12 signal deviates by
greater than 3 ppm from the local
system clock.
Check the external timing source
or the timing obtained from a
remote shelf.
LS prot assembly
removed
The system has been reset with no
low speed protection assembly
installed. This is not a valid system
configuration.
Install a low speed protection
assembly and execute the reset
function.
LS prot mode not
chgd-(crs)
An attempt to change the low speed
protection mode has failed because
all cross connections terminating on
low speed ports were not removed.
Remove all such cross
connections and execute the reset
function.
X.25
communication
failure
X.25 communication eqpt. failed;
failure at the O.S.
Issue trouble report to O.S.
* May be provisioned for Critical, Major, Minor, or no alarm.
† May be provisioned for Major, Minor, or no alarm.
Note: Similar descriptions of trouble may also appear in the CIT Alarm and Status Report.
Table A – Major (MJ) Alarm Conditions (Continued)
Alarm Level
or LED
Indication
Trouble Description
(Note) Likely Causes Step or Procedure
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