Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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remote party, AEC may be used to reduce/avoid echo when the you use the handset.
Note
Utilizing acoustic echo cancellation will introduce a small increase of delay into audio path which might
cause a lower voice quality.
Topic
AEC Configuration
The following table lists the parameter you can use to configure AEC.
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
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 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
Summary of Contents for T48G
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