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

1-68 Maintenance overview
The following limits apply to REX tests:

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
SREX controller coordinates all system REX tests under a common REX
test scheduler. Feature AF3771 allows you to schedule LCM REX tests
while other REX tests are in progress. The SREX test controller makes it
easier to perform a REX test on the whole switch. This action includes all
peripherals like the OPAC, in less time. The REX tests provide early
indication of faults that can impact service. These tests allow operating
company personnel to take corrective measures.
Feature AF3771 allows operating company personnel to find and resolve
REX test failures earlier. This feature reduces power failures in the field.
The SREX test controller allows operating company personnel to perform
the following actions:
The SREX test scheduler allows you to enter the CI level REXTEST
command and the following parameters:
297-8211-550 Standard 05.01 August 1999
The system REX test controller runs a REX test on one XPM at a time if
the office uses the NT-40 processor. The SuperNode supports concurrent
REX tests for a maximum of ten XPMs with the same REX test class.
A maximum of four LCM_REX_TESTs can run at the same time. These
tests can be run if the HOST XPM to which the tests relate is not in the
middle of a REX test.
The SREX scheduler schedules LCM_REXCOV tests for converter and
ringing voltages in LCM separately.
For a REX test to run, the node must be InSv or ISTb because of a REX
test failure.
If a restart occurs when a REX test is in progress, the system does not
generate a PM600 log. The restart deallocates the temporary data store
that the system uses to build the PM600 log.
change the order in which the system tests peripherals
coordinate between manual-initiated and system-initiated REX tests
use Table REXSCHED to receive alarms for the OPAC that are not in
the middle of a REX test in a time limit set
SUSPEND suspends REX tests for one maintenance window. A
maintenance window is the time period between the REXSTART and
REXSTOP time entered in Table OFCVAR under the
NODEREXCONTROL parameter.
RESUME resumes REX tests after interruption of REX tests.