Nortel DMS 100 Series Maintenance Manual page 78

2-62 Maintenance overview
For the REX sequence to occur at any time, both units must be INSV. The
REX test does not run when the following conditions occur:
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•
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•
When the system aborts the REX test because of a TST REX NOW command,
the system returns a message. This message informs operating company
personnel why the system terminated the REX test. If the system does not
return a message, the system generates a PM181 log with the same type of
message.
If a REX test fails, the system generates a PM600 log. The PM600 log initiates
a major alarm for the XPM that failed the REX test. The major alarm appears
at the MAP terminal under the PM banner at the top of the display.
If an INSV or OOS diagnostic test fails, the REX failure reason includes the
mnemonic. The mnemonic is an abbreviation of the diagnostic and the unit (O
or 1) that failed.
The PM600 log details the following:
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•
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The REX steps included in the log after the failed step are recovery actions.
The REX initiates the recovery actions as a result of the failure. The log
includes the unit number if the REX action is unit-specific (BSY unit, RTS
unit, TST unit, synchronized). The log does not include an action that affects
the node (SWACT, BSY both units). The auxiliary log data consists of a card
list and a mnemonic of the failed diagnostic.
The QUERYPM and QUERYPM FLT command strings contain information
about the last REX. Both manually and system-initiated REXs store and
display a new date/time and state (passed/failed) in the REX maintenance
record. Passed means the REX completed without errors. Failed means the
REX did not complete because of an error. This information is available
through the QUERY PM and TST REX QUERY command strings. If the REX
297-8223-550 Standard 04.02 November 2000
one unit is SysB and the PM is ISTb
both units are SysB and the PM is SysB
the PM is in overload
the PM is ISTb
Note: If the PM is ISTb because of a previous REX test, the REX test
runs again.
start time of each step the REX test executed
the unit the REX step affects
the failure reason