Polycom realpresence 1800 Administrator's Manual page 576

Network Security
Each conference on the Collaboration Server can host participants from the different IP Network networks
simultaneously.
The following figure shows the network topology with three different media and signaling networks and one
Management network connected to the Collaboration Server (RMX) 4000.
Collaboration Server (RMX) 4000 - Multiple Networks Topology Sample
Polycom®, Inc. 545