We have collected the most relevant information on Lync Audio Protocol. Open the URLs, which are collected below, and you will find all the info you are interested in.


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: Determine external A/V firewall and …

      https://docs.microsoft.com/en-us/previous-versions/office/lync-server-2013/lync-server-2013-determine-external-a-v-firewall-and-port-requirements

      Audio RTP payload for Lync - social.technet.microsoft.com

        https://social.technet.microsoft.com/forums/lync/en-US/128a4d52-c2ce-438d-8f22-7ba358eef986/audio-rtp-payload-for-lync
        Payload types 114 and 115 are used by MS for RT Audio and these are proprietary protocols used by Lync (and OCS). Proposed as answer by ALANMAD Thursday, November 29, 2012 3:55 PM Marked as answer by Kent-Huang Monday, December 3, 2012 1:59 AM

      Audio Device settings - support.microsoft.com

        https://support.microsoft.com/en-us/office/audio-device-settings-c148de81-269c-4c08-adad-346b6351f3d2

        Understanding Lync Modalities : Jeff Schertz's Blog

          http://blog.schertz.name/2014/08/understanding-lync-modalities/
          For audio streams UDP is the default protocol but if that cannot be established then Lync can fallback to using TCP, which is less desirable for delivery of real-time media over IP networks. If direct connectivity between the two clients fails for any reason then ICE will be used to leverage the Edge Server for assistance.

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