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

The following limits apply to REX tests:
The system REX test controller runs a REX test on only one XPM at a
time if the office uses the NT-40 processor. SuperNode supports
concurrent REX testing 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 if the
HOST XPM the tests associate with is not REX tested.
The system routine exercise (SREX) scheduler schedules
LCM_REXCOV test 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 while a REX test is in progress, the system does not
generate the PM600 log. The system does not generate this log because
the restart deallocates the temporary data store used to build the PM600
log.

System REX controller: XPM maintenance

Feature AF3771, System REX Controller: XPM Maintenance, provides the
SuperNode switch with a SREX controller. This controller coordinates
every system REX test under a common REX test scheduler. This feature
allows LCM REX tests to be scheduled while other REX tests are in
progress. The SREX test controller allows a REX test to run on the whole
switch, which includes peripherals like the RLCM, in less time. The REX
tests provide early indications of faults that can impact service. The REX
tests also allow operating company personnel to take corrective measures.
Feature AF3771 allows REX test failures to be found and resolved in less
time. These actions reduce outages in the field. The SREX test controller
also allows operating company personnel to
change the order in which peripherals are tested
coordinate between REX tests the system initiates and manually initiated
REX tests
receive alarms for the RLCM that are not REX tested in a time limit set
through table REXSCHED.
The SREX test scheduler allows the user to enter the CI level REXTEST
command and the following parameters:
SUSPEND suspends REX testing for one maintenance window. A
maintenance window is the time period between the REXSTART and
REXSTOP time entered in table OFCVAR. The time is entered under
the NODEREXCONTROL parameter.
DMS-100 Family RLCM Maintenance Manual XPM12 and up
Maintenance overview 1-77