Cisco Cisco TelePresence Video Communication Server Expressway
Screen Sharing
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Lync clients can share their screen with standards-based endpoints in the video network, because the
Gateway VCS can transcode RDP media into H.264.
Gateway VCS can transcode RDP media into H.264.
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The reverse transcode (from H.264 to RDP) is not supported. If the endpoint is capable of putting the
presentation in the main video channel, then the Lync user can see the presentation that way. Otherwise, if
the parties are in a conference, the conference bridge will compose the presentation (from the standards-
based endpoint) into the main video it sends to the Lync user.
presentation in the main video channel, then the Lync user can see the presentation that way. Otherwise, if
the parties are in a conference, the conference bridge will compose the presentation (from the standards-
based endpoint) into the main video it sends to the Lync user.
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Lync Server 2013 is the required server version for screen sharing. Other server versions are not supported for
this feature.
this feature.
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The following Microsoft clients can share their screen through the Gateway VCS, when they are in a Lync
Server 2013 environment:
Server 2013 environment:
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Lync 2013 for Windows (desktop version)
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Skype for Business 2015 (desktop version)
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Skype for Business 2016 (desktop version)
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Mobile versions of Lync and Skype for Business cannot share their screens.
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Screen sharing from Lync is supported when the Lync client is in a conference on a Cisco TelePresence
Server, with the following caveat:
Server, with the following caveat:
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In a conference hosted by a Conductor-managed TelePresence Server, a Lync client cannot share its
screen if the conference has dialed out to the Lync client. The Lync client can share its screen if it has
dialed in to the conference.
screen if the conference has dialed out to the Lync client. The Lync client can share its screen if it has
dialed in to the conference.
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Screen sharing from Lync is supported when the Lync client is in conferences hosted on MCU 5300 Series or
MCU MSE Series bridges, with the following caveat:
MCU MSE Series bridges, with the following caveat:
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When another endpoint steals the floor from the Lync presenter, the MCU does not revoke the floor. Lync
looks like it is still sharing, from the original presenter's point of view, when the other participants are not
seeing the Lync screen. See issue number
looks like it is still sharing, from the original presenter's point of view, when the other participants are not
seeing the Lync screen. See issue number
.
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Screen sharing from Lync is not supported when the Lync client is in conferences hosted on MCU 4200 Series
and MCU 4500 Series bridges.
and MCU 4500 Series bridges.
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Point to point calls with screen sharing from Lync have been tested and validated with TC, CE, and DX
endpoints, with the following caveats:
endpoints, with the following caveats:
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TC endpoints must be running TC version 7.2 or later to be able to compose main video and content when
they are presenting.
they are presenting.
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CE endpoints must be running CE version 8.0 or later to be able to compose main video and content when
they are presenting.
they are presenting.
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DX Series endpoints must be running firmware version 10.2(5) or later. The DX Series cannot compose
content and main video, so Lync users will see the content instead of the main video when these endpoints
are presenting.
content and main video, so Lync users will see the content instead of the main video when these endpoints
are presenting.
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We do support screen sharing from Lync to SIP or H.323 standards-based endpoints, but we cannot explicitly
test and validate all cases.
test and validate all cases.
The VCS Control requires the Interworking option key if interworking to H.323 endpoints.
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Cisco Jabber Video for TelePresence is not supported for screen sharing from/to Lync.
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Cisco Jabber is not supported for screen sharing from/to Lync.
Screen Sharing Performance Considerations
On all platforms, the default maximum number of concurrent transcoding sessions is 10. We recommend the
following numbers, depending on your platform:
following numbers, depending on your platform:
9
Cisco VCS and Microsoft Lync Deployment Guide
Introduction