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Configuring forced on-hook, Configuring an on-hook delay – H3C Technologies H3C MSR 5600 User Manual

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To configure silence detection-based automatic on-hook:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter FXO interface view.

subscriber-line line-number N/A

3.

Configure silence
detection-based automatic

on-hook.

silence-detect threshold threshold
time time-length

By default, the silence threshold is
20, and the silence duration f is

7200 seconds (2 hours).

Configuring forced on-hook

In some countries, PBXs do not play busy tones, or the busy tones only last for a short period of time.

When noise is present on a link, even the silence detection-based automatic on-hook function

(configured with silence-detect threshold) cannot detect the busy tones and fails to release a call after

on-hook. To solve this problem, configure the forced on-hook function. Forced on-hook disconnects a call
when the specified time expires, even if the call is ongoing.
To configure forced on-hook:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter FXO interface view. subscriber-line line-number N/A

3.

Configure forced on-hook. hookoff-time time

By default, forced on-hook is disabled.
If you configure this command on an FXO
interface of a card, the configuration

takes effect on all FXO subscriber lines of
the card.

Configuring an on-hook delay

An FXO interface goes on-hook when detecting a busy tone. This will cause the user of an IP phone
connected to the FXO interface to mistake the on-hook as a line problem because the user cannot hear

the busy tones.
To solve this problem, you can configure a delay time. During the delay time, the FXO interface continues

sending the busy tones to the IP phone.
To configure an on-hook delay:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter FXO interface view.

subscriber-line line-number N/A

3.

Configure the delay time from
when the FXO interface detects

a busy tone to when the

interface goes on-hook.

busytone-hookon delay-timer
value

The delay time is 0 seconds (the
FXO interface goes on-hook

immediately after detecting a busy

tone).