WebRTC connection error

[CSTT]

Hello!

When users connect to the conference, the user does not see or hear the participants. The participant count always changes quickly, in random order, from zero. After that, it gives the error "Meeting ended". There are warnings in the logs:
user "guest2940865668": V2 selected stream 0/2 GUID not recognized
sending session end message to participant b7a84dc8-402b-440e-92b4-90567fe7f5c2 due to error condition (reason = 12)

Cisco CMS ver.3.2

[fjlopezderego]

Hi,

    I know it is an old thread but I have seen that error and it is related to inactivity call drops. Usually means that the real time traffic is not received by the CMS so there are several potential reasons:

    - There is a FW between the user and the CMS not allowing the real time traffic.

    - There is a web proxy in between the user and the CMS and it only allows TCP traffic, not UDP. Remember CMS Core does not support RTP over TCP and you need a CMS Edge or Expressway Edge to make the TCP to UDP translation.

    - The browser used to connect to the CMS has no permissions to access camera/microphone. Take into account the web browser needs to be able to share screen (this can be blocked via policy as well) for content sharing.

    All these scenarios from a user point of view seems like they can connect, they see the participant list but they are dropped after few seconds.

Hope this helps.

BR