Nortel DMS-100 Series Maintenance Manual page 89

The system displays the following message when you enter the TST
COVREX NOW command.
Example MAP response:
LCM REM1 00 0 will be put into takeover mode during the
COV REX
Do you want to continue with the COV REX test
Please confirm ("YES", "Y", "NO", or "N")
Line concentrating module and ESA-independent REX test
The scheduler initiates REX tests on an LCM, and on completion, the
scheduler initiates the ESA REX test. A manually started LCM REX test
does not start an ESA REX test. A REX failure sets the LCM ISTb if InSv
diagnostics fail or SysB if OOS diagnostics fail.
Fault indicators
A REX test failure sets the LCM unit ISTb or SysB with a reason of REX
failed. The system performs audits on LCMs every 10 min and runs InSv
tests. The ISTb flag remains with a REX failed reason. If the audit fails and
the system detects additional failure conditions, the audit contributes to the
ISTb list. The system returns the unit to ISTb rather than InSv with the
REX failed reason if
the LCM is SysB
the system completes a successful RTS
To remove the ISTb state, the LCM must complete a successful manual RTS
or a successful manual or scheduled REX test.
The system generates the node assessment graph log (NAG400) every hour
or in response to the NAG command. This log lists all nodes that are not
in-service (InSv). The REX_INFO field of log NAG400 displays the results
of the latest REX test. For LCMs, the log lists the LCM_REX_TEST result
first. A colon separates this result from the LCMCOV_REX_TEST result.
For additional information about NAG400 logs, refer to the OPAC Related
Logs section of this document.
The CI level NAG command allows you to display all OOS nodes. The
MAP response to the NAG command is like the response that the NAG400
log report presents. The command and log report are part of the node
assessment graph (NAG) feature. The NAG feature provides a snapshot of
nodes in the system that are OOS or have a REX issue. To include the
offline nodes in the output, enter the command string NAG ALL. To turn
off the log report function that runs every hour, enter the command string
NAG ON or NAG OFF.
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Maintenance overview 1-73