Lcm Talk Battery Audit - Nortel DMS-100 Series Maintenance Manual

2-44 Functional overview

LCM talk battery audit

In the past, the report of a loss of talk battery to an LCM shelf did not occur
unless the talk battery fuse was blown. The report of the loss of talk battery
does not always occur. When this event occurs, operating company personnel
cannot know that LCM subscriber lines cannot draw dial tones.
The Talk Battery Alarm feature addresses this problem with the addition of
new CM and LCM maintenance software. This software periodically audits
each LCM shelf for the presence of talk battery. When the audit fails to detect
talk battery, the critical alarm log report (PM179) alerts the operating company
personnel.
Each LCM shelf must have a minimum of one world line card (WLC) to
support this feature. The WLC is normally for the talk battery audit use. The
subscriber can also use the WLC for call processing. The system can generate
a minor alarm log report (PM179). This event occurs when WLCs are not
available to perform the audit when the feature is ON.
Loss of talk battery
The following figure shows the distribution of talk battery in a remote line
concentrating equipment (RLCE) frame with LCA shelves. The distribution
of talk battery is the same for the OPM as for the RLCM. The distribution is
A feed to LCA-0 and B feed to LCA-1.
297-8361-550 Standard 04.02 December 2004
Note: This feature supports all WLC types. Limits are not present when the
WLC is in the LCM shelf.