Nortel DMS-100 Series Maintenance Manual page 126

4-26 Star Remote System automatic maintenance
LCMREX test flow
A REX test for an LCM includes the following procedure:
1. If both units of the LCM are in-service, unit 0 is made SysB, a PM128
2. In-service diagnostics are run on unit 1, which is in takeover. If any
3. Unit 0 returns to service. Out-of-service and in-service diagnostic
4. If unit 0 returns to service correctly, these steps are repeated for unit 1.
If a REX test fails, the system generates a PM600 log. The PM600 log starts
a major alarm for the experimental multiprocessor system (XMS) peripheral
module (XPM) that failed the REX test. This major alarm appears at the MAP
terminal under the PM banner at the top of the display. A PM181 log generates
after a successful REX test.
If an InSv or OOS diagnostic test fails, the REX test failure reason includes an
easy-to-remember abbreviation of the diagnostic program that failed and the
unit that failed (0 or 1).
The PM600 log details the
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The REX test steps included in the log after the failed step are recovery actions
the REX test initiates as a result of the failure. The unit number is included
when the REX test action is unit-specific (BSY unit, RTS unit, TST unit, sync)
and not an action that has an effect on the node (SWACT, BSY both units). The
additional log data includes a card list and an easy to remember designation of
the failed diagnostic program.
The QUERYPM, QUERYPM FLT, TST REX QUERY, and TST REXCOV
query commands contain information about the last REX test. Both manually
and system-initiated REX tests store and display a new date, time, and status
(passed or failed) in the REX test maintenance record. Passed means the REX
test completed with no errors. Failed means the REX test did not complete
because of an error. This information is available through the QUERY PM and
TST REX QUERY commands. If the REX test fails, the user either performs
297-8353-550 Standard 05.01 March 2001
state change log is output with the reason REX in progress, the LCM
node status is made ISTb, and a minor alarm is raised.
diagnostics fail, the unit is placed ISTb and a PM181 log is output.
programs are run. If out-of-service diagnostics fail, the unit is left SysB,
a major alarm is raised, and PM106 is output. If the unit returns to service
correctly and the in-service diagnostic program fails, the unit is placed
ISTb and a PM181 log is output.
start time of each step the REX test executed
unit changed by the REX test step
failure reason