Cisco Cisco TelePresence Video Communication Server Expressway
Introduction
This document extends the deployment described in
Microsoft Lync and Cisco VCS Deployment Guide, by adding a
Cisco TelePresence Advanced Media Gateway to interwork incompatible RT Video codec used by some Lync client
versions.
versions.
The Cisco AM GW allows traditional video codecs such as H.261, H.263 and H.264 to be converted to and from the
Microsoft RT Video codec. Use of the RT Video codec allows a Lync client to scale its displayed image from CIF
resolution, through VGA to 720p.
Microsoft RT Video codec. Use of the RT Video codec allows a Lync client to scale its displayed image from CIF
resolution, through VGA to 720p.
The Cisco AM GW enhances the video experience by upscaling the video format sent from Lync clients. Upscaling only
occurs if ClearVision is enabled on the Cisco AM GW (it is disabled by default).
occurs if ClearVision is enabled on the Cisco AM GW (it is disabled by default).
Resolution sent from Microsoft client
Upscaled resolution
CIF (352x288)
4CIF (704x576)
VGA (640x480)
XGA (1024x768)
HD (1280x720)
not applicable (remains 1280x720)
Lync for Mac clients do not support standard video codecs; they only support RT Video, which means that Cisco AM GW
is required to transcode the video.
is required to transcode the video.
Figure 1: VCS and Microsoft Lync deployment, including Cisco AM GW
For additional information about the Cisco AM GW see
.
Prerequisites to Configuring a Cisco AM GW
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The Gateway VCS must be running X7.0 or later and the B2BUA is required for operation with Microsoft Edge
Server. X8.6 or later is required for screen sharing from Lync.
Server. X8.6 or later is required for screen sharing from Lync.
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The Cisco AM GW must be running version 1.1 or later.
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The Gateway VCS can be a VCS Control or a VCS Expressway.
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VCS deployment as described in
Microsoft Lync and Cisco VCS Deployment Guide.
3
Microsoft Lync 2010, Cisco VCS and Cisco AM GW 3610 Deployment Guide