Star Module Maintenance - Nortel DMS-100 Series Maintenance Manual

4-32 Star Remote System automatic maintenance
ESA REX test. If a REX test is not successful, the LCM is set ISTb if InSv
diagnostic programs fail. The LCM is set SysB if OOS diagnostic programs
fail.
Fault indicators
A REX test that is not successful sets the LCM unit either ISTb or SysB with
a reason of REX failed. The system performs audits on LCMs every 10 min
and run InSv tests. The ISTb flag remains with a REX failed reason. If the
audit is not successful and additional failure conditions are detected, the audit
adds to the ISTb list. If the LCM is SysB and a successful system RTS
performs, the unit returns to ISTb instead of InSv with the REX failed reason.
To remove the ISTb state, the LCM must complete either a successful manual
or scheduled REX test.
The node assessment graph log (NAG400) is produced hourly, or in response
to the NAG command. The NAG lists all nodes that are not InSv. The
REX_INFO field of log NAG400 displays the results of the latest REX test.
For LCMs, the LCM_REX_TEST result is listed first, separated by a colon
from the LCMCOV_REX_TEST result. Refer to Extended Peripheral Module
Log Report Reference Manual, 297-8321-840 for more information about
NAG400 logs. More information about the NAG command is available in the
"Star Remote Hub user interface" chapter in this manual.
REX maintenance records
A maintenance record is output from a REX test to indicate results of recent
REX tests for each LCM entered in the system. This information is available
at the PM level of the MAP display for a posted LCM.
Note: After a reload restart, the maintenance record is erased for each
LCM.

Star Module maintenance

The software defines the Star Module as a Star Hub line drawer and not as a
node. Therefore, the CM considers the Star Module and its C-side DS-1 links
as a line drawer. The software does not consider the Star Hubs P-side DS-1
ports as elements that depend on the link maintenance process. These links are
hidden from normal maintenance activities and are not displayed at the
TRKS;CARRIER MAP level or by entering the TRNSL P command at the
STAR MAP level.
The Star Hub unit that controls a Star Module C-side link is the unit that scans
the link and makes the connection on that link. When both Hub units are in
service, Unit 0 controls the even numbered Hub DS-1 ports and Unit 1 controls
the odd numbered Hub DS-1 ports. Each Hub unit controls its own link to each
Module. When the Hub is in takeover mode, the in-service unit controls one
of the two links of each Module. The Module link scanned by the in-service
unit is the link which is in the higher state.
297-8353-550 Standard 05.01 March 2001