MicroNet Technology SP5052A/S, SP5054A/S user manual Good condition, smaller sending packet size is

	good condition, smaller sending packet size is
	recommended. In this parameter, 20/40/60ms is applicable
	to G.711u/a law, and G.729a codec, while 30/60ms is
	applicable to G.723.1 codec.
-priority	codec priority while negotiating with other sip device. This
	parameter determines the listed sequence in TCS message.
	The codec listed in left side has the highest priority when
	both parties determining final codec.
-volume	There are three adjustable value.

zvoice volume stands for volume, which can be heard from Micronet SP5052A/S / SP5054A/S Gateway side;

zinput gain stands for volume, which the opposite party hears. The maximum number is 35. If the number is over 35, the echo may be happened. Once you increase input gain, the voice volume from PSTN to IP side is increased too.

zdtmf volume stands for DTMF volume/level, which sends to its own Line1 or Line2.

-nscng	silence suppression and comfort noise generation setting (1
	= ON; 0 = OFF). It is applicable to G.723 codec only. An
	example is demonstrated below:

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usr/config$ voice -nscng g723 1

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-mindelay	the minimum jitter buffer size. (Default value= 90 ms)
-maxdelay	the minimum jitter buffer size. (Default value= 150

ms)

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usr/config$ voice -mindelay 90 -maxdelay 150 -optfacor 7

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-echo activate each canceller (1 = ON; 0 = OFF).

Note: be sure to know well the application before you change voice parameters because this might cause incompatibility.

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