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Polycom® RMX 1800 Administrator’s Guide
5-6 Polycom, Inc.
Master-Slave Cascading
It is similar to MIH (Multi Hierarchy) cascading, with only two levels: one Master MCU on
level 1 and several Slave MCUs on level 2.
The cascading hierarchy topology can extend to four levels (Figure 5-5) and should be
deployed according to the following guidelines:
• If an Collaboration Server is deployed on level 1:
— Collaboration Server systems can be used on level 2
— MGC with version 9.0.4 can be used on level 2 if Collaboration Server version 7.0.2
and higher is deployed in level 1
• If an MGC is deployed on level 1:
— MGC or Collaboration Server can be used on level 2.
Figure 5-3 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 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:
Table 1 MIH Cascading – Video Session Mode and Line Rate
Topology MCU Type
Video Session
Mode
Line Rate Endpoint
Level 1
Collaboration
Server
CP - HD
1.5Mb/s, 1Mb/s,
2Mb/s
HDX
Level 2
Collaboration
Server