Fault Isolation Tests For The Rcs; Rcs Alarms - Nortel DMS-100 Series Maintenance Manual

9-16 Trouble isolation and correction
The ISTb means that the CM set the active unit as ISTb, because the inactive
unit is OOS.
Action by the CM
The CM sets the active unit as ISTb. The CM cannot perform recovery
action at this point. If the audit runs twice in approximately 2 min and a
parity audit is not found, the CM returns the active unit to InSv. If a warm
SWACT continues to be not available, the unit remains as ISTb. There is no
PM106 log that indicates that the PM returned to service.
User action
If the inactive unit is OOS or cannot takeover call processing, the SMS
drops all call processing when the user busies the unit. Return the inactive
unit to service to try to get the unit to process calls. The static data is sent as
part of the RTS.

Fault isolation tests for the RCS

When a fault condition is detected in the remote concentrator SLC-96
(RCS), alarms are generated and maintenance is required. The fault could
occur with the RCS components. Operating company maintenance
personnel can use the fault isolation tests in this section to determine which
component caused the fault. Operating company maintenance personnel can
use the tests to remove the fault condition or report it to the appropriate
maintenance support organization. When troubleshooting the RCS,
operating company personnel can access the RCS level of the MAP display
and enter the command string

RCS alarms

The following types of RCS alarm messages are sent to the CM along with a
description of the required actions:
297-8231-550 Standard 09.01 August 1998
Node: ISTb, (Inact OOS) From InSv
Unit 0 Act: ISTb (Parity errors detected) from InSv
Unit 1 Inact: SysB
PM189—The active unit of the SMS has a parity fault that is not
continuous.
PM189 JUL23 23:29:17 5561 INFO PM SW INFORMATION REPORT
SMS 0 Unit 0: Act
TASKID: 00370037 PARAUDT, TIME:
COMID: FF NILCID
TEXT: intflt 00 00 57
—The following ISTb is present: an intermittent parity
>QUERYPM FLT
fault was detected in memory.
major
22:29:16.68
F6 00 00
.
>QUERYPM FLT