We have the following scenario:
- 1 Std Lync 2010 FE Server
- 1 Lync 2010 Edge Server
- 1 Lync conference with 2 or more user with Lync 2010 clients external
- 1 Lync Conference call - Invitation via Outlook Lync Online Meeting
When we conduct a Lync conference call with some external clients, we see the following issue by some clients:
- Lync 2010 external Client connects to the conference and can talk
- after 10 Seconds the client gets disconnected
- the client tries again and gets disconnected after 10 seconds again
- after several tries the client stays in the conference
- the call diagnostics on FE says:
ms-clinet-diagnostics:23:reason="Call failed to estblishe due to a media connectivity failure when one endpoint is internal ant the other is remote
We have this issues only with about 10% of the clients. Furthermore if we do the same conferencing with the same client on another Internet Provider, we don't run in this issue and everything just works perfectly.
Calling from the same external user to an internal user (peer to peer) works just fine for all clients.
Any help would be appreciated - Bueschu