“This is RTM pre-release documentation information and subject to change in General Availability (GA) release by December 2010 , I will update this post if any changes are required ”
When planning for media bandwidth usage per scenario, use the following tables, which describe the average amount of bandwidth used per media type.
Audio/Video Capacity Planning, Peer-to-Peer Sessions
Audio/Video Capacity Planning, Conferences
Audio Capacity Planning, PSTN
The network bandwidth numbers in these tables represent one-way traffic only and take silence suppression into account.
When you calculate the actual bandwidth usage for a certain scenario, it is important to understand the actual media flows, which are as follows:
In a two-party scenario:
- Users send audio streams only while they speak.
- Both participants receive audio streams.
- If video is used, both users send and receive video streams during the entire call.
In a Conferencing scenario (that is, a call with more than two participants):
- Users send audio streams only while they speak.
- All participants receive audio streams.
- If video is used, only two participants upload a video stream at a time (that is, the active speaker and the previous active speaker
- If video is used, all participants receive video streams.
Mino - The UC Guy 