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What are the list of port numbers used for Microsoft Lync ...
https://community.arubanetworks.com/blogviewer?blogkey=4ecedce3-a709-4524-8f91-76dfcb8e4ef3#:~:text=TCP%205063%20-%20Used%20for%20incoming%20SIP%20requests,for%20STUN%20%28Session%20Traversal%20Utilities%20for%20NAT%29%20messages.
Lync Server 2013: Ports and protocols for internal servers ...
https://docs.microsoft.com/en-us/previous-versions/office/lync-server-2013/lync-server-2013-ports-and-protocols-for-internal-servers
Lync Server 2013: Configuring port ranges for your ...
https://docs.microsoft.com/en-us/previous-versions/office/lync-server-2013/lync-server-2013-configuring-port-ranges-for-your-microsoft-lync-clients
In order to use Quality of Service, however, you will need to reassign the various traffic types (audio, video, media, application sharing, and file transfer) to a series of unique port ranges. This can be done by using the Set-CsConferencingConfiguration cmdlet.
Lync Video Ports - social.technet.microsoft.com
https://social.technet.microsoft.com/forums/lync/en-US/1924e911-0d03-4b57-9795-5c658129186a/lync-video-ports
By default the negotiated port range for any peer-to-peer media could be anything between 1024-65535. So you'll need to define a specific port range for media in Lync first, then open that range in the firewall between the networks.
Lync Server 2010 Port Ranges and Audio/Media …
https://www.shudnow.io/2010/12/06/lync-server-2010-port-ranges-and-audiomedia-negotiation/
The above command will set the starting Media (audio/video/etc.) port to 40000 and allow the next consecutive 40 ports to be used for media. This will be the equivelant of 40000 as the MinMediaPort and 40039 as the MaxMediaPort. Again, this should be within the supported 1024-65535 range as mentioned earlier in this article.
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