Backward Compatibility To Lync; Video Resource Requirements And Implications - Polycom RealPresence 1500 Administrator's Manual

The following table summarizes current and legacy (non DMA) conferencing modes within the deployment
architectures:
Conference Modes by Deployment Architecture
Deployment Architecture 1
Conference RealPresence Hosted
Mode Conferences
(Direct Dial In/Out)
With or without DMA
AVC Only Supported.
Dial Out from DMA is not
supported.
For backward compatibility,
Dial out from the RMX Web
Client or RMX Manager can
be used.
When using backward
compatibility mode for Dial
Out, the default video
protocol of H.264/SVC in
Lync 2013 clients is not
supported. Instead RTV will
be utilized, as long as that
codec has not been manually
disabled on the Collaboration
Server configuration using
any related system flag
setting which are covered
later in this section.
Mixed Mode
SVC Only

Backward Compatibility to Lync 2010

All Lync 2013 functionality can be disabled by adding the BLOCK_NEW_LYNC2013_FUNCTIONALITY
System Flag and setting its value to YES.
The flag's default value is NO. When the flag is set to YES, all Lync 2013's new functionality is disabled. All
Lync 2013 clients, whether connected directly or via cascading, will connect using the RTV codec, and not
the Microsoft H.264/SVC codec.

Video Resource Requirements and Implications

Lync 2013 SVC clients may not all connect to a VMR with the same stream layout. They are therefore
considered H.264 AVC participants and transcoding resources are allocated to them as summarized in the
following table.
Polycom®, Inc.
Supported.
Simulcast transmitted.
Multiple participants received.
Supported
Appendix H - Deployment Into Microsoft Environments
Deployment Architecture 2
Lync 2013 AVMCU Cascaded Conferences
(Indirect Dial In)
With DMA
(RealConnect)
Not Supported
Not Supported
Non DMA
(Backward Compatibility)
Supported.
One transmitted RTV stream.
One received RTV stream.
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