Polycom 1725-11530-310 Video Codecs, CodecPref/on page 1-12 and Codec Profiles codecPref/ on

Administrator’s Guide Addendum for the Polycom VVX 1500 Business Media Phone

Video Codecs

The following table summarizes the Polycom VVX 1500 phone’s video codec support:

			Frame		Effective
					video
Algorithm	MIME Type	Bit Rate	Rate	Frame Size	bandwidth
H.263	H263/90000,	64 kbps to	5 fps to	Tx Frame size:CIF,	Refer to Bit
	H263-1998/90000	768 kbps	30 fps	QCIF	Rate column.
				Rx Frame Size:CIF,
				QCIF, SQCIF, QVGA,
				SIF
H.264	H264/90000	64 kbps to	5 fps to	Tx Frame size:CIF,	Refer to Bit
		768 kbps	30 fps	QCIF	Rate column.
				Rx Frame Size:CIF,
				QCIF, SQCIF, QVGA,
				SIF

Configuration changes can performed centrally at the boot server:

Central	Configuration file:	Specify codec priority, payload type and jitter buffer tuning
(boot server)	sip.cfg	parameters.
		• For more information, refer to Codec Preferences
		<codecPref/>on page 1-12 and Codec Profiles <codecPref/> on
		page 1-13.

Audio Codecs

The following table summarizes the Polycom VVX 1500 phone’s audio codec support:

						Effective
Algorithm	MIME Type	Ref.	Bit Rate	Sample	Frame Size	audio
				Rate		bandwidth
G.711μ-law	PMCU	RFC 1890	64 Kbps	8 Ksps	10ms - 80ms	3.5KHz
G.711a-law	PCMA	RFC 1890	64 Kbps	8 Ksps	10ms - 80ms	3.5KHz
G.722	G722/8000	RFC 1890	64 Kbps	16 Ksps	10ms - 80ms	7 KHz
G.722.1	G7221/16000	RFC 3047	16 Kbps,	16 Ksps	20ms - 80ms	7 KHz
			24 Kbps,
			32 Kbps
G.722.1C	G7221/	G7221C	24 Kbps	32 Ksps	20ms - 80ms	14 KHz
	32000		32 Kbps
			48 Kbps

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