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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/Video Transport Usage; UDP. Preferred transport layer protocol for audio and video. TCP. Fallback transport layer protocol for audio and video. Required transport layer protocol for application sharing to Office Communications Server 2007 R2, Lync Server 2010 and Lync Server 2013
[MS-OCSPROT]: Lync and Lync Server Protocols Overview
https://interoperability.blob.core.windows.net/files/MS-OCSPROT/%5BMS-OCSPROT%5D-150904.pdf
[MS-OCSPROT]: Lync and Lync Server Protocols Overview This document provides a system overview for the protocols in the Communications Server system.
Ports and Protocols Requirement for Exchange and Lync ...
https://social.technet.microsoft.com/wiki/contents/articles/28141.ports-and-protocols-requirement-for-exchange-and-lync-server-deployment.aspx
443 STUN/TCP Outgoing Audio, video, application sharing sessions 444 HTTPS/TCP Bidirectional Lync Front End server 443 PSOM/TLS Outgoing Data sharing sessions 3478 STUN/UDP Outgoing Audio, video sessions, Desktop Sharing 5223 TCP Outgoing Lync Mobile pushes notifications 50000 – 59999 RTP/UDP Outgoing Audio, video sessions
Set up and test Lync audio - support.microsoft.com
https://support.microsoft.com/en-us/office/set-up-and-test-lync-audio-f4336d14-50ef-45a8-91df-1074121a0033
Set up your device In the Lync main window, go to Options > Audio device, and then choose the device you want. Click the green arrow next to Speaker to hear a sample tone, and drag the slider if you need to adjust the volume. To test your mic volume, speak for a few seconds.
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