User Guide

12 Chapter 1: Before You Begin
Calculating bandwidth usage
Here are some bandwidth calculations based on a meeting with audio, video, and slides.
Calculations are based on 1024x768 full screen.
• Room bandwidth: Modem setting
■ One Presenter can generate about 26 Kbits/sec of data.
■ Viewers need about 29 Kbits/sec of downstream bandwidth to have a good experience.
■ Having more than one Presenter on a modem room setting is not recommended.
■ Screen sharing is not recommended for use with the Modem bandwidth setting.
■ If screen sharing is added to Modem, the total bandwidth required is about 49 Kbits/sec.
This is close to saturating a modem connection. Any bottleneck in the network can cause
latency or an undelivered message.
• Room bandwidth: DSL setting
■ One Presenter generates close to 125 Kbits/sec of data.
■ Each viewer requires about 128 Kbits/sec to consume all the data generated.
■ Adding screen sharing requires 184 Kbits/sec.
■ To have a good Breeze Meeting experience with the DSL setting, make sure viewers have
available at least 200 Kbits/sec downstream bandwidth and Presenters have a 200 Kbits/sec
upstream bandwidth.
• Room bandwidth: LAN setting
■ One Presenter generates close to 250 Kbits/sec of data.
■ Each viewer requires about 255 Kbits/sec to consume all the data generated.
■ Adding screen sharing requires about 300 Kbits/sec.
■ To have a good Breeze Meeting experience with the LAN setting, make sure viewers have
available at least 400 Kbits/sec downstream bandwidth and Presenters have a 400 Kbits/sec
upstream bandwidth.
Note: The bandwidth requirements for screen sharing can vary according to the content being
shared and the screen resolution. These numbers are a general guideline—actual capacity varies in
each network environment.