Polycom realpresence 1800 Administrator's Manual page 271

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
Level 1 RealPresence
Collaboration Server
Level 2 RealPresence
Collaboration Server
Level 1 RealPresence
Collaboration Server
Level 2 RealPresence
Collaboration Server
Level 1 MGC
Level 2 RealPresence
Collaboration Server
Polycom®, Inc.
Video Session Mode
CP - HD
CP - CIF
CP - CIF 263
CP - CIF 264
Defining Cascading Conferences
Line Rate
1.5Mb/s, 1Mb/s, 2Mb/s
768Kb/s, 2Mb/s
768Kb/s, 2Mb/s
Endpoint
HDX
VSX
HDX, VSX
240