Cisco Cisco WebEx Meeting Center WBS30 Libro bianco

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Typical Measured Participant Bandwidth in WebEx Meetings without
Telepresence Participants

Table 1 shows average bandwidth consumption during a meeting using only WebEx applications. Because these

values are for video traffic only, please add an average of 60 to 150 kbps for VoIP traffic (where present). If audio

is out-of-band, such as PSTN or cellular, there is nothing to add. Scenarios where VoIP traffic is added include
choosing “Call My Computer” from the audio prompt in a desktop client or “Use the Internet for Audio” in a mobile

client.

Table 1.

Average Bandwidth Consumption for a Meeting Using Only WebEx Applications

Session

HQ-Active Video

Source

720 p

180p

360p

Six thumbs at 90p

One 180p + Six thumbs at 90p

Sender traffic (kbps)

1750-2380

330

911

Received traffic (kbps)

1260-1820

245

635

313

482

The actual bandwidth used by a WebEx client depends on a variety of factors, such as:

●

Is the WebEx client presenting?

●

Is the WebEx client receiving a presentation?

●

Does the current active speaker have the camera turned on?

●

Is the

WebEx client viewing the presentation in “full-screen” mode?

●

Is the presenter using two monitors?

●

Are the attendees viewing the meeting in docked mode, with the video in the top right corner only?

●

What kind of motion are user cameras picking up?

●

How quickly is the presenter advancing slides or changing scenes?

●

At what resolution is the presentation being sent?

The WebEx client is designed with bandwidth optimization in mind. It will not broadcast a 720p camera main video

image, for instance, if that client is not currently the active speaker in the meeting. Even if it is the active speaker in

a meeting, it will not send a 720p image unless someone in the meeting requests it. For example, a WebEx client

in a meeting using only WebEx applications must be viewing the main video data in full-screen mode for someone