Alcatel Voice over WLAN (R1.1.1) Specifications download pdf (Page 41)

The conference is still reusable using the same access code

For Meet me, scheduled conferencing and ad-hoc conferencing with more than 3 participants, the

MyIC Conferencing license option is required.

There are two principle methods of video conferencing:

Video switching (selective presence)

Video mixing (continuous presence)

Note : Depending on the video communication requirements, CPU processing requirements can

differ. A video MCU is needed for multi-party video conference with continuous presence.

Video Switching (selective presence)

Selective Presence means that only one camera is active at any specific time, for example, in the

case of a presentation where the speaker is seen by all the audience members.

Video can be provided by a software or a hardware solution with an MCU.

With a software solution:

All participants must be running with the same codec No codec conversion is possible

No resolution adaptation

No framing modification

If an MCU is included in the configuration, the video activation can include VAD (Voice Activity

Detection). This means that each active speaker activates their specific camera. H264 protocol is

based on periodic reference frame (image) followed by updates. When the speaker is changing, the

system switches on the new speaker and displays him/her as well.

To ensure the image quality on each of the video end points, all the video client should have the

same configuration in terms of supported codecs, resolution and framing.

Video mixing (continuous presence)

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Alcatel Voice over WLAN (R1.1.1) Specifications Page 41