Lync uses a number of different protocols to operate, and it can sometimes be confusing keeping track of which one does what. This is a short overview of the protocols in Lync and what they are for. Continue reading “Protocols used by Lync” »
The latest cumulative update for Lync was recently released, and one of the fixes deals with an interesting problem to do with audio conferences. I thought I would take the opportunity to discuss a few things about how media works in a Lync audio conference, and the implications of this change in the update.
The fix that I’m referring to (details here) resolves a problem where one-way audio could occur between a client and an audio/video MCU. For background, the MCU, or multipoint control unit, is the Lync component that mixes media for the conference and distributes it to the participants. What was happening in certain cases was that an audio conference participant would be audible in the conference, but could not hear other participants.
It turns out that the reason for this was an issue with media encryption in the MCU. Continue reading “A/V MCU encryption fix in Lync CU4” »