Welltech FXS SIP Gateway V.2.9 - Manual (Page 116)

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FXS Gateway Overview
dtmf volume (0~31, default: 23),
-nscng No sound compression and CNG. (G.723.1 only, On=1, Off=0).
-echo Setting of echo canceller. (On=1, Off=0, per port basis).
-mindelay Setting of jitter buffer min delay. (0~150, default: 90).
-maxdelay Setting of jitter buffer max delay. (0~150, default: 150).
Example:
voice -send g723 60 g711u 60 g711a 60 g729 60
voice -volume voice 20 input 32 dtmf 27
voice -echo 1 1 1 1
usr/config$
Figure 21-34 voice command list
Parameter Usages:
-print: Print current voice information and configurations.
-send: To define packet size for each codec. 20/40/60/80 ms means to send a voice
packet per 20/40/60/80 milliseconds. The smaller packet size, the shorter
delay time. If network is in good condition, smaller sending packet size is
recommanded. In this parameter, 20/40/60ms is applicable to G.711u/a law,
20/40/60/80ms is applicable to G.729 codec, while 30/60ms is applicable to
G.723.1 codec.
-priority:
Codec priority while negotiating with other SIP device. The codec
listed in left side has the highest priority when both parties determining
final codec.
usr/config$ voice –priority g723 (only select this codec)
usr/config$ voice –priority g723 g729 g711u g711a (select four codecs, and
g723 is the first choice)
-volume: There are three adjustable value.
--voice volume stands for volume, which can be heard from Gateway
side(range 0~63, default: 28).
--input gain stands for volume, which the opposite party hears (range 0~38,
default: 28).
--dtmf volume stands for DTMF volume/level, which sends to its own Line
(range 0~31, default: 23).
-nscng: Silence suppression and comfort noise generation setting (1 = ON; 0 = OFF).
It is applicable to G.723 codec only.
usr/config$ voice -nscng g723 1
-echo: On or Off the activate each canceler.
-mindelay: The minimum jitter buffer size (Default value= 90 ms).