Alarms - Nortel DMS-100 Series Maintenance Manual

9-20 Trouble isolation and correction
The following commands cannot be executed on a remote carrier, but the
commands appear on the CARRIER menu display:
The DMS–100 switch automatically performs audits of DS–1 links.

Alarms

System problems can cause signals transmitted between an SMS and an
RCS to not meet specifications. These problems can include:
The DMS-100 switch monitors these signals. When the signals do not meet
specifications, OMs are pegged and the maintenance limit (ML) and OOS
limit (OL) are increased. Steady or excessive frame losses, slips, or BpV
normally cause a carrier to be set to OOS.
Note: Operating company personnel use the
MAP terminal to allow a carrier to be put OOS when it exceeds the OL.
Excessive BpV causes a carrier to be put OOS, regardless of how the
operating company personnel use the
The LCGA and remote carrier group alarm (RCGA) are the two DS-1
carrier alarms. The LCGA associates with signals from the RCS to the
SMS. The RCGA associates with signals from the SMS to the RCS.
Steady-state frame loss for a time specified in table CARRMTC causes an
LCGA. The LCGA is cleared when the frame is regained for a time data
entered in table CARRMTC.
Isolated or intermittent faults, like frame losses, slips, or BpV, accumulate.
When the faults reach the ML, the system updates a field marked ML on the
MAP display. The appearance of the field warns operating company
personnel that faults have occurred or occur on the carrier.
297-8231-550 Standard 09.01 August 1998
display carriers in an exact state
post a carrier or group of carriers
protection switch a carrier.
>TST
>BSY
>RTS
.
>OFFL
frame losses
slips
bipolar violations (BpV)
other faults
>SETACTION
command.
>SETACTION
command at the