Cisco High-Density Analog Voice and Fax Network Module

Configuration Tasks

To change parameters related to disconnect supervision, use the following commands as appropriate, in voice-port configuration mode:

 

Command

Purpose

Step 1

 

 

Router(config-voiceport)# battery-reversal

Enables battery reversal. The default is that battery

 

 

reversal is enabled.

 

 

For FXO ports—Use the no battery-reversal

 

 

command to configure a loop-start voice port to not

 

 

disconnect when it detects a second battery reversal.

 

 

The default is to disconnect when a second battery

 

 

reversal is detected.

 

 

Note Also use the no battery-reversalcommand when

 

 

a connected FXO port does not support battery

 

 

reversal detection.

 

 

For FXS ports—Use the no battery-reversal

 

 

command to configure the voice port not to reverse

 

 

battery when it connects calls. The default is to

 

 

reverse battery when a call is connected, then return

 

 

to normal when the call is over, providing positive

 

 

disconnect.

 

 

See also the disconnect-ackcommand (Step 7).

Step 2

 

 

Router(config-voiceport)# supervisory disconnect

(FXO only) Enables the PBX or PSTN switch to provide

 

 

STD. By default the supervisory disconnect command is

 

 

enabled.

Step 3

 

 

Router(config-voiceport)# disconnect-ack

(FXS only) Configures the voice port to return an

 

 

acknowledgment upon receipt of a disconnect signal. The

 

 

FXS port removes line power if the equipment on the FXS

 

 

loop-start trunk disconnects first. This is the default.

 

 

The no disconnect-ackcommand prevents the FXS port

 

 

from responding to the on-hook disconnect with a

 

 

removal of line power.

 

 

 

Cisco IOS Release 12.2(2)XT and 12.2(8)T

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Weed Eater 2600 manual Enables battery reversal. The default is that battery, Reversal is enabled, Reversal is detected