Configuring the sending of LCFO signals

You can configure an FXS voice subscriber line to send a loop current feed open (LCFO) signal to indicate a disconnection to the peer. This feature is used mainly in North America.

To configure the sending of LCFO signals:

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter FXS voice subscriber line view.

subscriber-line line-number

N/A

3. Enable the FXS voice subscriber line to send an LCFO signal at hangup.

disconnect lcfo

Optional.

By default, an FXS voice subscriber line does not send an LCFO signal at hangup. It plays busy tones to the peer.

4. Configure the LCFO signal duration.

timer disconnect-pulse milliseconds

Optional.

750 milliseconds by default.