Minumim bandwidth required for given display resolutions on a single screen endpoint:
|Minimum bandwidth (kbps) for single screen endpoint||Resolution/frame rate (H.264)|
To achieve the same resolution on both screens, double the bandwidth for the dual screen experience. For example, to get 720p30 on both screens, double the bandwidth that is allocated for a single screen displaying at 720p30. The Meeting Server takes the available bandwidth, subtracts the audio bandwith and then splits the bandwidth across the two screens.
See also: FAQ 1338.