System Rex Controller: Xpm Maintenance - Nortel DMS-100 Series Maintenance Manual

2-64 Functional overview
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System REX controller: XPM maintenance

Feature AF3771, System REX Controller: XPM Maintenance, provides the
SuperNode switch with an S/DMS system REX test (SREX) controller. The
controller coordinates all system REX tests under a common REX test
scheduler. This feature allows LCM REX tests to run when other REX tests
are in progress. The SREX test controller allows performance of a REX test
on the whole switch in less time. Tests run on all peripherals, like the OPM.
The system performs REX tests to provide early indication of defects that can
impact service. The REX tests allow operating company personnel to take
corrective measures.
Feature AF3771 allows REX test failures to be found and resolved in a
minimum amount of time. This feature reduces outages in the field. The
SREX test controller allows operating company personnel to perform the
following:
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The SREX test scheduler allows the user to enter the CI level REXTEST
command and the following parameters:
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297-8361-550 Standard 04.02 December 2004
tests at the same time for a maximum of ten XPMs. The XPMs must have
the same REX test class.
A maximum of four LCM_REX_TESTs can run at the same time. This
action can occur when the system does not REX test the HOST XPM the
tests are associated with.
The LCM_REXCOV test for converter and ringing voltages in LCM must
run separately. The SREX scheduler make sures this condition occurs.
For a REX test to run, the node must be InSv or ISTb because of a REX
test failure.
When a restart occurs when a REX test is in progress, the system does not
generate a PM600 log. This event does not occur because the restart
deallocates the temporary data store that builds the PM600 log.
change the order in which the system tests peripherals
coordinate between manual- and system-initiated REX tests
receive alarms for the OPM not REX tested in a time limit set with table
REXSCHED
The SUSPEND parameter suspends REX tests for one maintenance
window. A maintenance window is the time period between the
REXSTART and REXSTOP time in table OFCVAR under the
NODEREXCONTROL parameter.
The RESUME parameter resumes REX tests after suspension of REX
tests.