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Conferencing Modes Overview
Polycom®, Inc. 15
● Video Switching uses fewer system resources than CP: only one CIF video resource per participant
for any resolution (including HD). The table below lists the resources available to VSW conferences
by line rate and card type.
The following table lists the recommended number of connections at HD1080p resolution for fully
configured and licenced RealPresence Collaboration Server (RMX) systems. For detailed resource
capacity information see the relevant RealPresnce Collaboration Server Hardware Guide.
● The maximum supported video conference size is 180 participants with the MPMx card, or with
Collaboration Server 1800.
● The display aspect ratio is 4x3 or 16x9.
● Site (endpoint) names, skins, message overlay etc. are not supported in Video Switching.
● Video forcing is enabled at the conference and participant levels.
● To connect to a Video Switching conference via Entry Queue, the Profile assigned to the Entry Queue
must be set to Video Switching. It is recommended to use the same profile for both the destination
conference and Entry Queue.
● Telepresence Mode is unavailable in Video Switching conferences.
● In RealPresence Collaboration Server (RMX) 2000/4000 with MPMRx media cards, each participant
connecting to a VSW conference consumes one HD720 port.
VSW Resource Capacity Line Rate
Resource Type
Maximum Possible Resources *
MPMx MPMRx RMX 1800
VSW 2Mbps 80* 65 200
VSW 4Mbps 40* 65 150
VSW 6Mbps 20* 50 100
* Capacity numbers are for maximum capacity card assemblies. These numbers may be lower when LPR
and/or encryption are enabled.
Maximum Number of HD1080p Connections by Line Rate
Line Rate/Participants
RMX 1500
(MPMx) /
RMX 1800
RMX 2000 RMX 4000
MPMx MPMRx MPMx MPMRx
Up to 2Mbps 80 160 130 320 260
4Mbps 40 80 130 160 260
6Mbps 20 40 100 80 200