RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 243
Basic Cascading using IP Cascaded Link
In this topology, both MCUs can be registered with the same gatekeeper or the IP addresses of both MCUs
can be used for the cascading link. Content can be sent across the Cascading Link.
Basic Cascading Topology - IP Cascading Link
For example, MCU B is registered with the gatekeeper using 76 as the MCU prefix.
The connection between the two conferences is created when a dial out IP participant is defined (added) to
conference A whose dial out number is the dial-in number of the conference or Entry Queue running on
MCU B.

Dialing Directly to a Conference

Dial out IP participant in conference A dials out to the conference running on MCU B entering the number
in the format:
[MCU B Prefix/IP address][conference B ID].
For example, if MCU B prefix is 76 and the conference ID is 12345, the dial number is 7612345.

Dialing to an Entry Queue

When dialing to an Entry Queue, the dial out participant dials the MCU B prefix or IP address of MCU B and
the Entry Queue ID in the format:
[MCU B Prefix/IP address][EQ B ID]
For example, if MCU B prefix is 76 and the Entry Queue ID is 22558, the dial number is 7622558.
When the participant from conference A connects to the Entry Queue, the system plays to all the participants
in Conference A the IVR message requesting the participant to enter the destination conference ID.
At this point, the Conference A organizer or any other participant in the conference can enter the required
information for the IVR session using DTMF codes. For example, the meeting organizer enters the
destination conference ID - 12345.
Any DTMF input from conference A is forwarded to the Entry Queue on MCU B to complete the IVR session
and enable the move of the participant to the destination conference B.
Once the DTMF codes are entered and forwarded to the Entry Queue on MCU B, the IVR session is
completed, the participant moved to the destination conference and the connection between the two
conferences is established.