HP MSR2000/3000/4000 Router Series Voice Command Reference

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Predefined user roles
network-admin
Parameters
threshold: Specifies the silence threshold in the range of 0 to 200. If the amplitude of voice signals from
the PBX is smaller than this value, the system regards the voice signals as silence.
time-length: Specifies the silence duration for automatic on-hook, in the range of 2 to 7200 seconds.
When the silence duration exceeds the specified duration, the FXO interface performs on-hook
automatically.
Usage guidelines
If the device fails to detect busy tones or the PBX does not play busy tones, you can use this command to
implement automatic on-hook. When the duration of silence exceeds the configured silence duration, the
FXO interface automatically disconnects the call.
Improper configuration of this function can lead to false on-hook. A good practice is to test multiple sets
of parameters and choose the set of parameters that can quickly release the FXO interface after on-hook
and does not cause false on-hook.
Examples
# Set the silence threshold to 20 and the silence duration to 100 seconds for FXO interface 1/0.
<Sysname> system-view
[Sysname] subscriber-line 1/0
[Sysname-subscriber-line1/0] silence-detect threshold 20 time 100
slic-gain
Use slic-gain to configure the output gain of the subscriber line interface circuit (SLIC) chip.
Use undo slic-gain to restore the default.
Syntax
slic-gain { 0 | 1 }
undo slic-gain
Default
The output gain of the SLIC chip is 0 (0.8 dB).
Views
E&M interface view
Predefined user roles
network-admin
Parameters
0: Sets the output gain of the SLIC chip to 0.8 dB.
1: Sets the output gain of the SLIC chip to 2.1 dB.
Examples
# Set the output gain of the SLIC chip to 1 (2.1 dB) for E&M interface 1/0.
<Sysname> system-view