MicroNet Technology SP5001A/S - Manual (Page 50)

5.5. Voice Configuration
Codec Priority
Set the Codecs priority here. If you set the g723 at first priority,
g729a at second priority, then the gateway will use g723 to
negotiate the connection first, then shift to second codec if the
first didn’t match
Frame Size
Set Specify sending packet size, G.723: 30/60/90, G.711A,
G.711U, G.729: 20/40/60/80ms, G.729A: 20/40/60/80ms. The
smaller the packet size, the shorter the delay time. If network is
in good condition, smaller sending packet size is recommended
G.723 Silence
Suppression
Silence Suppression, also called “Voice activation detection”
(VAD) is a software application that allows a data network
carrying voice traffic over the Internet to detect the absence of
audio and conserve bandwidth by preventing the transmission of
"silent packets" over the network.
Volume
Adjust the volume levels
Voice (Incoming) : 0 ~ 63
Input gain
(Outgoing) : 0 ~ 38
DTMF
(Keypad tone) : 0 ~ 31
Echo Cancelor
Echo Canceller is designed to cancel acoustic feedback
between a loudspeaker and a microphone in loud speaking
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