Polycom 8 manual Option, Description, 10-17, 3:Basic Conference Parameters

	MGC WebCommander User’s Guide
Table 10-3: Basic Conference Parameters
Option	Description
FECC/LSD Rate	Using certain video cameras and their
	accompanying software, a participant can control a
	far-end camera. This field is used to define the
	FECC/LSD mode. A conference can be set to one of
	the following LSD modes:
	• LSD Dynamic - The On Going conference starts
	with the LSD data channel closed. The MCU
	opens the LSD data channel upon request from
	a participant and assigns the data token to that
	participant. The LSD channel remains open
	throughout the conference, until the conference
	ends. In Video Switching mode, endpoints that
	do not support LSD are connected as Secondary
	(audio only).
	• LSD 6.4 (Fixed) - The MCU opens the LSD data
	channel (at a fixed rate of LSD-6400) when
	starting the conference and keeps the channel
	open throughout the conference. When a
	participant requests the far-end control, s/he is
	assigned the data token. In Video Switching
	mode, endpoints that do not support LSD are
	connected as Secondary (audio only).
	• LSD - None - The LSD option is disabled and
	any request for far-end camera control during the
	conference is rejected.
T.120 Rate	Select the desired T.120 data transfer rate. The
	lower the rate the slower the transfer rate and the
	response time.
	The same T.120 rate must be set for all the
	conference participants. The highest rate common to
	all participants should be selected.
	Select None to disable the T.120 mode. For H.323
	conferences you are required to select a T.120 rate.
	The capacity for a H.323 board is six participants
	irrespective of the Line Rate.

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