User's Manual
Chapter 5-Cascading Conferences
Polycom, Inc. 5-39
Defining the Cascade Enabled Entry Queue on the Collaboration Server
If the dialing is done from the conference running on the MGC that is the Master MCU, a 
Cascade-enabled Entry Queue must be defined on the Collaboration Server setting it as 
Slave. 
For more details, see Collaboration Server to Collaboration Server Cascading.
Defining the Cascading Conferences
The table below lists the line rates and the video settings that should be used when defining 
the conferences on the MGC. The same line rates should be selected when defining the 
Conference Profiles on the Collaboration Server, as well as whether the conference is HD 
Video Switching. However, the video settings will be automatically selected by the system.
In addition, the conference running on the MGC should be set as Meet Me Per Conference 
and select the H.239 option in the Dual Stream Mode field. For more details on conference 
definition on the MGC, refer to the MGC Manager User’s Guide, Volume I, Chapter 5.
Defining the Dial-out Participant on the Collaboration Server
If the dialing is done from a conference running on the Collaboration Server to the 
conference running on the MGC, the dial-out participant is defined in the conference 
Table 5-5  Recommended Conference Line Rates for Cascaded Conferences
Topology Video Session Mode
Conference Line 
Rate
MGC
Collaboration 
Server
MGC - CIF 263
Collaboration Server - CIF 
264 CP
768Kb/s, 2Mb/s
MGC - HD VSW
Collaboration Server - HD 
VSW
1.5Mb/s










