Polycom 8 manual 10-13

	MGC WebCommander User’s Guide
Table 10-3: Basic Conference Parameters
Option	Description
Video Rate In/Out	This field is relevant to Software Continuous
	Presence conferences. It displays the ratio between
	the incoming video rate of a single endpoint and the
	video rate of the outgoing stream (4 times the
	incoming video rate of a single endpoint).
	The Video Rate is in correlation to the Line Rate -
	this is for informational purposes only and cannot be
	changed.
Conference On	The Conference On Port option is available if
Port	Continuous Presence was selected in the Video
	Session box of the Conference Properties—Basic
	tab.
	For a Conference On Port session, select the
	estimated highest transfer rate common to all
	participants. The Conference On Port method forces
	all conference participants to use the same video
	parameters. For example, if two participants connect
	at a rate of 384 Kbps and one participant connects at
	a rate of 128 Kbps, all participants will connect, but
	the video quality will be that of the 128 Kbps
	participant for all participants.
	In order to maintain a minimum video quality for a
	Conference On Port, there is a minimum threshold
	line rate that participants must support in order to
	connect with video. This minimum threshold line rate
	is determined according to the conference Line
	Rate. For example, in a conference defined with a
	Line Rate of 768 Kbps, a participant with a line rate
	of 128 Kbps will connect as Secondary (Audio Only),
	in order to preserve the video quality of the
	conference.

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