Lync 2010 One Way Audio

How to do a one way audio and video conference with Lync 2010?

https://social.technet.microsoft.com/Forums/en-US/5e237fb5-63ac-415d-9182-240808c94438/how-to-do-a-one-way-audio-and-video-conference-with-lync-2010

The Lync client will still receive the video, it just obviously won't be able to receive it. Regarding audio the clients will need to have an audio device so they can join the call portion of the meeting, but you'll simply set all attendees to mute (a presenter can do this) so that all audio is only received and not sent.

A one-way audio media flow is established between the ...

https://support.microsoft.com/en-us/topic/a-one-way-audio-media-flow-is-established-between-the-avmcu-and-a-lync-2010-client-bcb4b9bb-a044-7594-f8d1-ff7bcd80c567

When a dial-out call is sent to the Lync 2010 client, a one-way audio media flow is established between the Lync 2010 client and the Audio Video Multipoint Conferencing unit (AVMCU). Cause. This issue occurs because the AVMCU incorrectly applies the crypto-scale SRTP key to the audio channel. However, the Lync 2010 client uses the non-scale MKI key.

One-Way Audio Issue in Skype for Business and AudioCodes

https://www.mirazon.com/one-way-audio-issue-in-skype-for-business-and-audiocodes/

For many years, using a different vendor’s SBC, everything has been all fine and dandy with no problems; even through Lync 2010, Lync 2013, and the Skype For Business 2015 transition. This one-way audio issue only cropped up when putting the …

Lync 2013 client experiences one-way audio - Skype for ...

https://docs.microsoft.com/en-us/skypeforbusiness/troubleshoot/server-phone-system/one-way-audio-after-pstn-call-hold

Enterprise Voice – Lync 2010 (one of many to come)

http://www.lynclog.com/2011/05/enterprise-voice-lync-2010-one-of-many.html

I am facing one way audio issue with my level 3 SIP trunk.. the issue is with inbound & outbound calls.. My setup is, collocated mediation & frontend server.. Mediation server internal IP 10.10.50.1 is NATed externally to public ip 1.2.3.4. and allowed all required ports for SIP trunk provide in both way.