Defining Cascading Conferences

Automatic Identification of the Cascading Link

In both dialing methods, the system automatically identifies that the dial in participant is an MCU and creates a Cascading Link and displays the link icon for the participant ( ). The master-slave relationship is randomly defined by the MCUs during the negotiation process of the connection phase.

Basic Cascading Using ISDN Cascaded Link

ISDN connection can be used to link between two MCUs or MCU and gateway and create a cascading conference. Content can be sent across the ISDN Cascading Link.

ISDN Cascaded Links are not supported when the RealPresence Collaboration Server is in Ultra Secure Mode. For more information see Ultra Secure Mode.

Network Topologies Enabling Content Sharing Over ISDN Cascaded Links

ISDN Cascaded links that support content sharing can be created between two gateways, gateway-to-MCU or between two MCUs in the following network topologies:

Gateway to Gateway

Gateway to Gateway Topology

In this topology, an IP participant calls another IP participant over an ISDN link between two gateways.

Gateway to MCU

Gateway to MCU/ MCU to Gateway Topology

In this topology, an IP participant calls a conference running on an MCU via a gateway and over an ISDN link.

Polycom®, Inc.

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Polycom 1500/1800/2000/4000 manual Basic Cascading Using Isdn Cascaded Link, Automatic Identification of the Cascading Link