Polycom 8 manual 10-19

	MGC WebCommander User’s Guide
Table 10-3: Basic Conference Parameters
Option	Description
Audio Alg.	Select the preferred audio algorithm. The available
	audio algorithms are: 8 (G.729/G.723.1), 16 (G.728/
	Siren7), 24 (Siren14/G.722.1/Siren7), 32 (Siren14/
	G.722.1/Siren7), 48 (Siren14/G.722/G.711), 56
	(G.722/G.711), or 56 (G.711).
	Siren 7 and Siren14 are Polycom proprietary audio
	algorithms. Siren14 may be used if the system is
	configured to Wideband.
	Note:
	The system must include:
	• The appropriate Polycom settings to support
	Siren14
	• Siren14 is available with Audio+ cards
	Even if the conference is set to Siren14 if the
	endpoints do not connect in Siren14, the
	conference will use G.722.1 instead.
	In Video Switching conferences, all of the
	participants must use the same audio algorithm.
	Participants with endpoints that do not support the
	algorithm selected for the conference are connected
	as Secondary (Audio only). If the conference line
	rate is set to 2B or 128 Kbps, to achieve the best
	audio and video quality select the appropriate audio
	algorithm for all the participants in the following
	order: G.728, G.722, G.711
	When Siren7 (16, 24 or 32 bit) is available, select the
	audio algorithm in the following order: Siren 7 (16),
	G.728, G.722, G.711, Siren7 16 bit and G.728
	algorithms are interchangeable, and a participant
	using either one will be fully connected when one of
	them is selected as the audio algorithm.
	If the conference line rate is higher than 128 Kbps, to
	achieve the best audio and video quality, select the
	audio algorithm in the following order: G.722.1 (32),
	G.722.1 (24), G.722 / G711.

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