2-10 DS-1 configuration
297-2521-106 Standard 23.01 March 2001
Performance and maintenance
The carrier level of the DMS-250 switch MAP terminal contains alarms and
display fields that are indicators of the DS-1 trunk performance. To access
the carrier level of the MAP terminal, enter the following command:
>MAPCI;MTC;TRKS;CARRIER
All performance data parameters have user-defined alarm points associated
with them on a per-carrier basis. In some cases, two alarm points are
appropriate, specifying a maintenance level and an out-of-service level.
Performance group alarms
Default values to performance group alarms are adequate for normal
maintenance procedures.
Carrier group alarms
The carrier group alarms also have user-defined alarm points associated with
them (on a per-carrier basis). These alarm points signify the filter period
used to time the alarm. Two filter periods are required: one to define entry
into the alarm, and one to define the exit from the alarm.
The carrier options for the nth posted circuit can be displayed by using the
DispOpt command. Card code, options, and alarm thresholds are displayed
with this command. A carrier can be looped towards the near (l) or far (r)
end by using the Loop n <l/r/c> command. The loop is cleared using the (c)
option.
Alarms
The following is a listing of alarms applicable to the DS-1 trunk. All alarm
settings mentioned are default settings and can be altered in table
CARRMTC.
• remote carrier group alarm (RCGA)—yellow alarm
• local carrier group alarm (LCGA)—red alarm
• alarm indication signal
• DATA—data not downloaded correctly to XPM
• SCAN—scan path enable failure
RCGA—yellow alarm
The remote carrier group alarm indicates a remote alarm detection in the
receive path.
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