User Guide

Auto Answer Delay: To configure delay time before an
incoming call is automatically answered.
Answer Mode: To configure the incoming call is answered via
audio mode or video mode.
Early DTMF: To enable or disable early DTMF.
DTMF Pause Time: To configure the delay time to send out
the DTMF code.
Direct IP: To enable or disable direct IP call.
5.8. Phone-Audio
5.8.1. Echo Canceller
To remove acoustic echo from a voice communication in order
to improve the voice quality.
VAD (Voice Activity Detection): Allow IT82A(869) to detect
the presence or absence of human speech during a call.