Polycom RealPresence 1800 Administration Manual page 384

Common Behavior - RealConnect / Direct Call Modes
● In the event of MCU failure DMA will attempt to find another MMCU on which to create the content
stream. For RealConnect calls there are two calls to the Lync side of the topology. The first call is to
subscribe or notify. The second call, created when content is shared, is to establish the content media
channel. The subscription call is created when the a/v call is created. If successful, a Content
Gateway call is established immediately after the call to the ASMCU is established. If another MMCU
is not found, the conference is created on a non-modular MCU without RDP content capability
resulting in Polycom and Lync clients not being able to share content.
● ICE credentials are updated on the system in both RealConnect and Direct Call modes for both
on-premise and federated environments.
● Ongoing calls may be disconnected, however the system recovers automatically from the following
failures:
 ICE Server
 Lync Server
Enabling RDP Content
Enabling RDP content needs configurations on DMA and IP Network Service.
Polycom MCU Video Quality Dialog on DMA
Select Enable MS RDP content on DMA through Polycom MCU Video Quality > Content Video Definition.
Note: Enable MS RDP on DMA
Before enabling MS RDP on DMA, make sue no ContentConnect server is configured in DMA.
IP Network Services - SIP Servers Dialog
If the SIP Server Type is configured to Microsoft, an additional information box for the Translator SIP Proxy
is displayed.
Polycom, Inc.
Appendix - Modular MCU
363