Polycom 8 manual Limitations, Option, Description, 10-22

Chapter 10 - Conference Templates – Full Parameters View

Table 10-3: Basic Conference Parameters

Option	Description
Dual Stream Mode	When an endpoint can support both H.239 and
(con’t)	People+Content protocols, H.239 is selected as the
	preferred communications protocol.
	In the Reservation Template Settings - Dual Stream
	mode drop down box, three H.239 People+Content
	(H.239/P+C) Video streaming formats are available:
	Graphics - for standard graphics
	Hi-res Graphics - for high quality display or highly
	detailed graphics
	Live Video - for video clips or live video display
	128 Kbps is the minimum Line Rate setting for a
	H.239/People+Content conference. When the
	Content channel opens, the required bit rate is taken
	from the video channel bit rate, and may affect the
	quality of the transmitted video quality. The bit rate
	allocated to the Content channel depends on the
	conference type and the conference line rate, where
	the minimum is 64 Kbps, and increases in multiple of
	64 Kbps. The bite rate allocation is dynamic and
	when the Content channel closes, the video bit rate
	is restored to its maximum.
	People+Content in a Cascading conference is
	enabled only for Video Switching IP Only
	conferences, in a Star CascadedH.239 and
	People+Content supports the following features:
	•	Entry Queues
	• Highest Common Phase 2
	•	H.264
	•	4CIF
	•	Encryption
	• FECC (H.320 and H.323)
	Limitations
	• In Continuous Presence conferences - Software
		and Quad View modes are disabled
	• H.239 is not supported in:
		•	ISDN (H.320) calls
		•	H.320 Cascading conferences

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