Bic Relay Test - Nortel DMS-100 Series Maintenance Manual

4-18 Star Remote System automatic maintenance
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Faults that occur on a BIC drawer have an effect on call processing without
regard to which unit is in-service and controlling that drawer. Because the full
in-service tests use the DCC, operating company personnel must first
determine if the fault is not in the DCC where takeover is justified. If takeover
occurs as a result of a reported drawer fault, the DCC is at fault although the
LCM has failed the BIC tests.
In the takeover mode, the inactive unit DCC cannot access any drawers for call
processing. However, the inactive unit DCC can access any drawer for testing.
The active LCM unit still has access to all drawers through its DCC.
Valid drawer faults do not take an LCM or Star Hub unit out of service.
However, the status of the unit continues to be ISTb. The ISTb reason is either
Self Test or Diag Fail, depending on which test failed and caused the
ISTb condition. After the CC has detected an LCM unit is ISTb, the unit is
made SysB because the CC has received too many unsolicited messages.

BIC relay test

The BRT tests the reversal relay for the tip and ring on each BIC in a Star Hub.
The BRT tests allows for both the manual testing of a single drawer of a
defined Star Hub or LCM and the scheduled testing of all LCMs or Star Hubs
in an office. The QUERYPM FLT command indicates the drawers that failed
the manual or system BIC relay test. This test generates a PM181 log and a
PM132 log to indicate test results. Refer to Extended Peripheral Module Log
Report Reference Manual, 297-8321-840 for detailed information about
BRT-related logs.
The following paragraphs describe the levels of BRT testing.
Office level
The schedule includes loops over each LCM or Star Hub. A single BRT runs
on each drawer of the given LCM or Star Hub. A log report displays the results
of the tests that join the results of each drawer test.
STAR level
This test runs from the planned BRT. The planned test selects an LCM or Star
Hub that had none of its drawers tested during the BRT window defined by the
office parameters. A BRT is run on each drawer of this LCM or Star Hub.
Drawer level
This test runs from the LCM-level planned test or manually from the STAR
MAP display level. The drawer level test is a single Star Hub drawer test.
297-8353-550 Standard 05.01 March 2001
ZERO_CROSSING_INT_SLOW_FAIL
MEMORY_TEST