Load File Mismatch; Automatic Maintenance; Rlcm-Edc Audits - Nortel DMS-100 Series Maintenance Manual

Load file mismatch

A load file mismatch fault condition exists when a load in the active bank of
the LCM does not match the load specified in table LCMINV.

Automatic maintenance

The DMS-100 Family peripheral modules (PM) are designed to be reliable
under many different fault conditions. Peripheral modules contain several
hardware redundancies that serve as backup operations for module, card, and
link failures. Therefore, fault conditions can exist without immediate
serious impact to service.
When fault conditions occur, the DMS and the RLCM-EDC initiate audits or
other system actions to try to find the fault and correct it automatically.
The following sections discuss the following types of automatic
maintenance:

RLCM-EDC audits

Audits are scheduled to run in the RLCM-EDC every 15 seconds to refresh
the control data for DS-1 and LCC circuits and to monitor the LCC for
faults. The DS-1 interface cards are monitored for faults by a second audit
run every second. However, the RLCM-EDC does as many as three links
every second. The normal audit period is every second. However, if more
than three links are datafilled, and the unit is in takeover, the audit period is
every two seconds. The functions of these system audits, as they affect LCC
and DS-1 circuits, are described in the following paragraphs.
Link control card maintenance
The RLCM-EDC monitors the status of its LCC to ensure control data are
being transmitted correctly to the LCC and the LCC clock is running
fault-free. Control data are rewritten to the LCC periodically.
RLCM-EDC audits
checksums
LCM LTC speech path diagnostics
takeover capability
RMM maintenance
drawer testing
BIC relay testing (BRT)
subscriber line automatic maintenance
LCM routine exercise (REX) tests
Maintenance overview 1-55
DMS-100 Family Maintenance Manual ABSK007