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Defining Cascading Conferences
Polycom®, Inc. 240
Master-Slave Star Cascading Topology
● When creating a cascading link between two RealPresence Collaboration Servers:
The RealPresence Collaboration Servers operate in CP (Continuous Presence) mode.
● When creating a cascading link between MGCs and RealPresence Collaboration Servers:
The MGCs can only operate in VSW mode.
The following table summarizes Video Session Modes line rate options that need to be selected for each
conference in the cascading hierarchy according to the cascading topology:
MIH Cascading – Video Session Mode and Line Rate
Topology MCU Type Video Session Mode Line Rate Endpoint
Level 1 RealPresence
Collaboration Server
CP - HD 1.5Mb/s, 1Mb/s, 2Mb/s HDX
Level 2 RealPresence
Collaboration Server
Level 1 RealPresence
Collaboration Server
CP - CIF 768Kb/s, 2Mb/s VSX
Level 2 RealPresence
Collaboration Server
Level 1 MGC CP - CIF 263 768Kb/s, 2Mb/s HDX, VSX
Level 2 RealPresence
Collaboration Server
CP - CIF 264