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MGC WebCommander User’s Guide
10-19
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.
Table 10-3: Basic Conference Parameters
Option Description