Nortel DMS-100 Series Maintenance Manual page 123

The WLC must verify the presence of talk battery feed to the WLC to test for
loss of talk battery feed. The test passes when talk battery feed is present. The
test fails when the talk battery feed is not present.
When off-hook, call processing busy (CPB), or both, occupy an InSv WLC,
the audit does not perform the talk battery test. The audit assumes the talk
battery test passes. Examples of occupied states are talking, ringing and
maintenance lockout. In the ringing state, the WLC is on-hook and in a CPB
state.
When the audit finds a failure of the talk battery test, the system generates a
critical alarm log report (PM179). The LCM shelf is placed in an ISTb state.
The audit does not report the failure again until diagnostics clear the alarm and
the ISTb state.
Diagnostics
The talk battery test part of into the InSv and OOS diagnostics for an LCM
unit. The diagnostics affected include the following commands:
• Tst Unit unit_no
• Tst PM
• Tst REX NOW
• Rts Unit unit_no
• Rts PM
Diagnostics reports all talk battery failures. This report occurs even when the
audit tests the same LCM repeatedly. When the talk battery test passes, the
diagnostics clear the alarm and the ISTb reason. Both the manual and
automatic versions of these commands are impacted. The diagnostics run talk
battery tests while the talk battery alarm feature is enabled.
Each LCM shelf must be provisioned with a WLC to support the talk battery
alarm feature. Special provisioning rules do not affect where the WLC resides
in the shelf. The maintenance line card in LSG 0 Card 0 for the LCM shelf can
be assigned as a WLC. When this event occurs, the feature can or cannot use
this card. This line card tests the ringing generators and determines if the
feature can use the card.
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
Functional overview 2-47