Polycom RealPresence 1800 Administration Manual page 102

Master-Slave Star Cascading Topology
● When creating a cascading link between two Collaboration Servers:
 The Collaboration Servers operate in CP (Continuous Presence) mode.
● When creating a cascading link between MGCs and 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 Collaboration Server
Level 2 Collaboration Server
Level 1 Collaboration Server
Level 2 Collaboration Server
Level 1 MGC
Level 2 Collaboration Server
Level 1 MGC
Level 2 Collaboration Server
To establish the links between two Collaboration Servers requires the following procedures be performed:
● Establish the Master-Slave relationships between the cascaded conferences by defining the dialing
direction.
● Create the Master and Slave conferences, defining the appropriate line rate.
Polycom, Inc.
Video Session Mode
CP - HD
CP - CIF
CP - CIF 263
CP - CIF 264
VSW - HD
VSW - HD
Line Rate
1.5Mb/s, 1Mb/s, 2Mb/s
768Kb/s, 2Mb/s
768Kb/s, 2Mb/s
1.5Mb/s
Cascading Conferences
Endpoint
HDX
VSX
HDX, VSX
HDX
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