Polycom 1725-11530-200 Rev A1 Codec Profiles profiles, Attribute Permitted Interpretation Values

Administrator’s Guide - SoundPoint® IP / SoundStation® IPOptimization

	Permitted
Attribute	Values	Default	Interpretation
voice.codecPref.IP_300.G711Mu	Null, 1-3	1	Specifies the codec preferences for
			SoundPoint® IP 300 and 301 plat-
voice.codecPref.IP_300.G711A		2
			forms. Interpretation as above.
voice.codecPref.IP_300.G729AB		3
voice.codecPref.IP_4000.G711Mu	Null, 1-3	1	Specifies the codec preferences for
			the SoundStation® IP 4000 platform.
voice.codecPref.IP_4000.G711A		2
			Interpretation as above.
voice.codecPref.IP_4000.G729AB		Null	Not supported by default so that
			G.711Mu and G.711A local confer-
			ences can be supported. This restric-
			tion will be removed in a future
			release.

4.6.1.8.1.2 Codec Profiles <profiles/>

The following profile attributes can be adjusted for each of the three supported codecs. In the table, x=G711Mu, G711A, or G729AB.

Attribute	Permitted	Interpretation
	Values
voice.audioProfile.x.payloadSize	10, 20, 30,	Preferred Tx payload size in millisec-
	...80	onds to be provided in SDP offers and
		used in the absence of ptime negotia-
		tions. This is also the range of supported
		Rx payload sizes.
voice.audioProfile.x.jitterBufferMin	20, 40, 50,	The smallest jitter buffer depth (in milli-
	60, ... (multi-	seconds) that must be achieved before
	ple of 10)	play out begins for the first time. Once
		this depth has been achieved initially, the
		depth may fall below this point and play
		out will still continue. This parameter
		should be set to the smallest possible
		value which is at least two packet pay-
		loads, and larger than the expected short
		term average jitter. The IP4000 values
		are the same as the IP30x values.
voice.audioProfile.x.jitterBufferShrink	10, 20, 30, ...	The absolute minimum duration time (in
	(multiple of	milliseconds) of RTP packet Rx with no
	10)	packet loss between jitter buffer size
		shrinks. Use smaller values (1000 ms) to
		minimize the delay on known good net-
		works. Use larger values to minimize
		packet loss on networks with large jitter
		(3000 ms).

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