Fault Isolation Tests For The Sms; Handling A Sysb Sms Unit - Nortel DMS-100 Series Maintenance Manual

Standard problem solving steps
Perform the following standard troubleshooting steps to locate and clear
faults:
1 Silence audible alarms that occur when the system detects alarm
2 Isolate the fault. Read status displays and trace fault codes to the menu
3 Busy (BSY) the hardware to remove the system access to the defective
4 Test the defective component and identify the card to replace. Replace
5 Return the hardware to service.

Fault isolation tests for the SMS

When the system detects a fault condition in the SMS, the fault requires a
maintenance action. The fault can occur with the SMS components.
Operating company maintenance personnel use fault isolation tests to
determine which component causes the fault. Operating company personnel
use these tests to remove the fault condition or report the fault condition to
maintenance support. Operating company personnel access the SMS level
of the MAP display and enter the command string
troubleshoot the SMS. The following paragraphs provide methods to handle
exact conditions.

Handling a SysB SMS unit

When the system busies an SMS unit, the SMS unit is not in service (InSv)
any longer. If the unit is active, a warm Switch of Activity (SWACT)
occurs. Operating company personnel access the SMS level of the MAP
display and enter the command string
SMS. The following table lists possible reasons for a system busy (SysB)
SMS alarm. In most events, the log report mirrors the
response.
conditions.
level required to clear the fault.
component. This allows you to perform maintenance activity without
system interference.
the defective card and test the component again.
DMS-100 Family SMS Maintenance Manual XPM10 and up
Trouble isolation and correction 9-3
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