RMX 2000 Administrator's Guide Version 7.6.1 - Polycom

Cascading Conferences - H.239-enabled MIH Topology
MIH Cascading Levels
Level 1
Level 2
Level 3
Level 4
Chapter 4-Cascading Conferences
H.239 Multi-Hierarchy (MIH) cascading is available to RMX users enabling them to run
very large conferences on different MCUs in multiple levels of Master-Slave relationships
using an H.323 connection.
Multi-Hierarchy (MIH) Cascading is implemented where the cascaded MCUs reside on
different networks, whereas Star Topology Cascading requires that all cascaded MCUs reside
on the same network.
MIH Cascading allows:
• Ability to open and use a content channel (H.239) during conferencing.
• Full management of extremely large, distributed conferences.
• Connecting conferences on different MCUs at different sites.
• Utilizing the connection abilities of different MCUs, for example, different
communication protocols, such as, serial connections, ISDN, etc.
• Significant call cost savings to be realized by having participants call local MCUs which
in turn call remote MCUs, long distance.
Although participants in MIH Cascading conferences can connect using H.323, SIP and ISDN, the
MIH Cascading Links must connect via H.323.
The cascading hierarchy topology can extend to four levels (Figure 4-3) and should be
deployed according to the following guidelines:
• If an RMX is deployed on level 1:
— Any RMX can be used on level 2, MGC version 9.0.4 can be used on level 2 and
DST MCS 4000 and other MCUs can be deployed on levels 3 and 4.
• If an MGC is deployed on level 1:
— MGC or RMX can be used on level 2, and DST MCS 4000 and other MCUs can be
deployed on levels 3 and 4.
• DST MCS 4000 MCUs connect as endpoints to the RMXs or MGCs on higher levels.
RMX
MCU DST MCS 4000
Figure 4-3 MIH Cascade Levels
Polycom, Inc. 4-27
MGC
RMX
or
or
MGC
For more information about this
configuration, see the relevant MGC
documentation.