Nortel DMS-100 Series Maintenance Manual page 53

stability from the original active unit over the SWACT back. The system
drops new calls made after the SWACT. The system drops new calls made
before SWACT back. If a SWACT back is not successful, both units of the
XPM become system busy and return to service.
Note 1: After a SWACT back, operational measurements and peg counts
do not start again.
Note 2: The system does not support the SWACT controller feature
during XPM or CM overload.
The SWACT back ability is available for the following commands that you
issue:
SWACT
SWACT TEST
SWACT NOW
SWACT ALL
SWACT FORCE
TST REX NOW
BSY ACTIVE
BSY UNIT unit_no
where
unit_no is the number of the active unit
Note: The SWACT back ability is available for a rating exercise (REx) test
that the REx scheduler initiates. For more information on interaction
between this feature and REx tests, refer to Routine exercise test on page
1-42.
Feature AF5006, PM Diagnostic History, provides a database of information
on each XPM unit that subtends the DMS-100 switch. The SWACT
controller uses this information to determine if an inactive unit can maintain
activity if a warm SWACT occurs. The system resets the collected
information when the unit correctly gains activity.
DMS-100 Family SMS Maintenance Manual XPM10 and up
Maintenance overview 1-37