Handling An Istb Sms Unit - Nortel DMS-100 Series Maintenance Manual

9-6 Trouble isolation and correction
Standard troubleshooting methods require a test of an exact unit of a SysB
SMS. If the unit passes the tests and can RTS, the system clears the SysB
fault. A list of suspected defective SMS cards can accompany test failures.
The following is an example of a card list.
SMS 60 Unit 0 Tst Failed
Failed to open link
Site Flr RPos Bay_id Shf
HOST 00
HOST 00
HOST 00
HOST 00
HOST 00
Replace one card at a time, in the order of the list. Test the unit until the
fault clears.
If the test fails, a message like
Use the
fault. If the reset fails, a list of suspected defective cards accompanies the
failure. This list is like the card list for test failures. Replace the cards one
at a time. Replacement of a defective card can clear the SysB problem.
Fault clearance in a SysB SMS can require you to reload software to the
SMS. The system indicates a software problem if reset, reload and
replacement of a suspect card failed to a clear a SysB fault.
Contact your maintenance support group.

Handling an ISTb SMS unit

When an SMS goes ISTb, the unit has a fault but can continue to process
calls. The following table lists normal responses and descriptions when you
enter command string
lists reasons for the ISTb SMS alarm. In most events, the log report mirrors
the
Assessing ISTb alarms for the SMS
Message at SMS level
One/Both Unit (s)
ISTb
PM Overloaded
297-8231-550 Standard 09.01 August 1998
C05 SME 00 51
C05 SME 00 65
C05 SME 00 51
C05 SME 00 51
C05 SME 00 51
command to reset the SMS. This action can clear the
>PMRESET
>QUERYPM FLT
response.
>QUERYPM FLT
Description
SMS : 60
SMS : 60
SMS : 60
SMS : 60
SMS : 60
No Reply From PM
at the SMS MAP level. The table
Alarm Possible conditions
Minor One or both units are ISTb.
Minor Traffic load exceeds the ability of the
PM to process calls.
—continued—
Slot EqPEC
:22 6X40
:22 6X40
:21 6X41
:18 6X69
:12 MX77
accompanies the failure.