Chapter 4-Additional Conferencing Information
Polycom, Inc. 4-63
—If the main link is disconnected all sub-links are disconnected and deleted.
Reconnecting the main link reconnects all sub-links.
—If a sub-link is disconnected it remains disconnected until it is manually
reconnected.
—The number of Multiple Cascade Links cannot be modified while any of the links are
in a disconnected state. All previous links must be deleted before modification is
possible.
For more information see "Monitoring Multiple Cascade Links” on page 1-1.
• A Link Participant can be dragged from the address book into a conference.
—If it is the first Link Participant in the conference, the number of Multiple Cascade
Links defined for the participant are created and connected.
—If it is not the first Link Participant in the conference, the number of Multiple Cascade
Links defined for the participant is ignored.
• If there are insufficient resources to connect all Multiple Cascade Links in either of the
RMXs, none of the links are connected and resources deficiency -0 is listed as the Call
Disconnection Cause. For more information see "Monitoring Multiple Cascade Links” on
page 1-1.
•Multiple Cascade Links that are not used by MLA are inactive but continue to consume
resources.
• All RMXs participating in the cascade must have the same Telepresence Mode definitions,
either all defined as CP or all defined as Room Switch.
• When Multiple Cascade Links are defined in the Conference Profile, the Layout Type field of
the Link Participant’s Participant Properties - Media Sources dialog box is set to Conference
and cannot be modified.
• TIP Telepresence Rooms (CTS) are supported without Content. For more information
see "Collaboration With Cisco’s Telepresence Interoperability Protocol (TIP)” on page I-1.

Enabling and Using Multiple Cascade Links

The settings required to enable Multiple Cascade Links on the RMX are minimal and are
described in "Creating a Link Participant” on page 4-66.
Most of the layout configuration is performed using Polycom’s Multipoint Layout Application
(MLA).
Figure 4-3 and Figure 4-4 show example layouts and media flows when MLA is configured
for a cascading conference between two RMXs.
In Figure 4-3:
• The OTX Room System connects to RMX A.
• The RPX Room System connects to RMX B.
• This layout requires that the Telepresence Layout Mode to be set to Room Switch in the
Conference Profiles of the Cascading Conferences in each RMX.
• The current speaker is a participant in the RPX ITP Room.