IP0120/IP0121 User Manual
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4.4.2
Voice
4.4.2.1
Ring / handset / handfree Volume –
Adjust the volume of receiving voice.
4.4.2.2
CodecTxGain –
Adjust the output voice volume.
4.4.2.3
Ring Type –
Adjust the ring type(ring pattern) of an incoming call.
4.4.2.4
RTPLowBW –
This ability is to decrease the voice packet bandwidth of the transmit
direction in order to improve the voice quality of transmit direction if
the internet bandwidth is not good enough.
4.4.2.5
Jitter Buffering –
Enlarge the jitter buffering ability of receiving voice packet direction
from normal 150ms to 400ms. When in some specific internet
connection, the traffic is arriving is with large jitter, i.e. with bad voice
quality, you can improve the voice quality by enabling the “Jitter
Buffering” function.
4.4.3
Others
4.4.3.1
VAD –
Voice Activity Detection, the IP Phone will detect if the user is talking
or not, and avoid to send voice packet when the user is silent to decrease
the bandwidth requirement.
