Polycom Version 1.4.x 17 manual Codec Preferences preferences Attribute, Codec Profiles profiles

Administrator Guide - SoundPoint® IP / SoundStation® IP				Optimization
4.6.1.6.1.1 Codec Preferences <preferences/>
	Attribute	Permitted	Default	Interpretation
		Values
	voice.codecPref.G711Mu	Null, 1-3	1	Specifies the codec preferences for
				SoundPoint® IP platforms.
	voice.codecPref.G711A		2
				1=highest
	voice.codecPref.G729AB		3
				3=lowest
				Null=do not use
				Give each codec a unique priority,
				this will dictate the order used in
				SDP negotiations.
				Note: If less than two codecs are
				specified, the phone will automati-
				cally use G711Mu and G711A with
				default parameters.
	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.

4.6.1.6.1.2 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.

	Permitted
Attribute	Values	Interpretation
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.

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