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.
Utilizing acoustic echo cancellation will introduce a small increase of delay into audio path which might
cause a lower voice quality.
Topic
AEC Configuration
AEC Configuration
The following table lists the parameter you can use to configure AEC.
It enables or disables the AEC (Acoustic Echo Canceller) feature on the IP phone.
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
VAD Configuration
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