Audio Features
359
Parameter voice.echo_cancellation <y0000000000xx>.cfg
Description It enables or disables the AEC (Acoustic Echo Canceller) feature on the IP phone.
Permitted
Values
0-Disabled
1-Enabled
Default 1
Web UI Settings->Voice->Echo Cancellation->ECHO
Noise Suppression
The impact noise in the room is picked-up, including paper rustling, coffee mugs, coughing, typing, and silverware
striking plates. These noises, when transmitted to remote participants, can be very distracting.
You can enable the Noise Suppression feature to suppress these noises.
It is only applicable to CP920 IP phones.
Topic
Noise Suppression Configuration
Noise Suppression Configuration
The following table lists the parameter you can use to configure noise suppression.
Parameter voice.tns.enable <y0000000000xx>.cfg
Description
It enables or disables the Noise Suppression feature on the IP phones.
Note: It is only applicable to CP920 IP phones.
Permitted
Values
0-Disabled
1-Enabled
Default 1
Web UI Settings->Voice->Noise Proof->Noise Suppression
Background Noise Suppression (BNS)
Background noise suppression (BNS) is designed primarily for hands-free operation and reduces background noise to
enhance communication in noisy environments.
Automatic Gain Control (AGC)
Automatic Gain Control (AGC) is applicable to the hands-free operation and is used to keep audio output at nearly a
constant level by adjusting the gain of signals in some circumstances. This increases the effective user-phone radius
and helps with the intelligibility of soft-talkers.
Voice Activity Detection (VAD)
VAD can avoid unnecessary coding or transmission of silence packets in VoIP applications, saving on computation and
network bandwidth.
Topic
VAD Configuration
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