350
Item Description
Max Interval between
Off-hook and Dialing the
First Digit
Specify the maximum interval in seconds between off-hook and dialing the
first digit.
Upon the expiration of the timer, the user will be prompted to hook up and the
call is terminated.
Max Duration of Playing
Ringback Tones
Specify the maximum duration in seconds of playing ringback tones.
Status
• Enable.
• Disable.
Advanced Settings
Off-hook Mode
• Delay off-hook—In this mode, you need to configure a dedicated line
number, which the system uses to connect the call to the callee
automatically. The communication can be performed over the FXO
subscriber line only after the callee picks up the telephone.
• Immediate off-hook—In this mode, when a call arrives, the FXO
interface goes off-hook immediately and then the caller performs the
second stage dialing.
Binding FXS Line
Bind an FXS voice subscriber line to the FXO voice subscriber line. This list is
available only when you select the
Delay Off-hook
option in the
Off-hook
Mode
area.
To keep the consistent off-hook/on-hook state between the bound FXS and
FXO lines, the specified FXS line must be the one to which the dedicated line
number points. In addition, only the bound FXS line is allowed to originate
calls to the FXO line by restricting incoming calls.
Ring Mode
• Delay Ring.
• Immediate Ring.
You can select the
Delay Ring
option to quicken ringing synchronization
between the FXO voice subscriber line and its bound FXS voice subscriber
line. However, for the telephone supporting calling identification display, the
calling number will be displayed after the second ringing tone.
Duration before a Forced
On-hook
In some countries, PBXs do not play busy tones, or the busy tones played by
them only last for a short period of time. When noise is present on a
transmission link, the configuration of silence threshold and silence duration
for automatic on-hook cannot solve the problem that the resource of the FXO
interface cannot be released. In this case, you can specify the duration before
a forced on-hook to solve the problem.
No duration is configured by default.
IMPORTANT:
Once the duration before a forced on-hook is configured, the call will be
automatically disconnected when the duration expires, even if the call is going
on.
Dial Delay Time
Configure the dial delay time.
By default, the dial delay is 1 second.
VAD Threshold
Set the silence threshold.
If the amplitude of voice signals from the
switch is smaller than this value, the
system regards the voice signals as
silence. Generally, the signal amplitude
on the links without traffic is in the range
of 2 to 5.
By default, the silence threshold is 20.
Silence detection-based
automatic on-hook prevents the
case that the resource of the FXO
interface cannot be released
owing to busy tone detection
failure when the busy tone
parameters provided by the
connected PBX are special.
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