Backward Compatibility To Lync 2010 - Polycom realpresence 1800 Administrator's Manual

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.
Bandwidth and Resource Consumption by Video Codec
Video Codec Resolution and Aspect
Ratio
H.264 320x180 (16:9)
Coded as 320x192
212x160 (4:3)
H.264/RTVideo 424x240 (16:9)
Coded as 432x240
320x240 (4:3)
H.264 480x270 (16:9)
Coded as 480x272
424x320 (4:3)
Coded as 432x320
H.264/RTVideo 640x360 (16:9)
Coded as 640:368
640x480 (4:3)
H.264 848x480 (16:9)
H.264 960x540 (16:9)
Coded as 960:544
H.264/RTV 1280x720 (16:9)
H.264 1920x1080 (16:9)
Polycom®, Inc.
Appendix H - Deployment Into Microsoft Environments
Maximum Video Minimum Video
Payload Bit rate Payload Bit rate
(Kbps) (Kbps)
250 15
350 100
450 200
800 300
1500 400
2000 500
2500 700
4000 1500
Resources
CIF
CIF
SD
SD
SD
SD
HD720p30
HD1080p30
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