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Configuring the off-hook mode, Configuring ring detection parameters – H3C Technologies H3C MSR 5600 User Manual

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Configuring the off-hook mode

The FXO interface supports two off-hook modes:

Immediate mode—Upon receiving a call, the FXO interface goes off-hook and sends a dial tone to
the calling party. Then, the calling party dials the destination number.

Delay mode—Upon receiving a call, the FXO interface places a call to the specified private line
number. When the called party picks up the phone, the FXO goes off-hook. This mode needs to

work with the private line auto ring-down (PLAR) function. For more information about PLAR, see
"Configuring dial programs."

To configure the off-hook mode:

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 off-hook mode. hookoff-mode { delay |

immediate }

By default, the immediate mode is
used.

Configuring ring detection parameters

PBXs from different vendors use different types of ring signals. By setting ring detection parameters, you

can enable the FXO interface to detect ring signals of different frequencies and waveforms.
To configure ring detection parameters:

Step Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enter FXO interface view.

subscriber-line line-number N/A

3.

Set the debounce time for ring
detection on the FXO

interface.

ring-detect debounce value

The default is 10 milliseconds.

Do not set the debounce time

during a conversation.

Do not set too short a debounce
time, because false ring tone

recognition might occur under

power line interference.

If you configure this command

on an FXO interface of a card,

the configuration takes effect on

all FXO subscriber lines of the
card.

4.

Set the frequency value for

ring detection.

ring-detect frequency value

The default is 40 Hz.