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 (Figure5-5) 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