I'm trying to setup an SIP-video-conversation between two paticipant via a public SIP-Registar using SIP-communicator. I manage to register both at the registrar and to get both paticipant in connected state. Unfornunatelly there is picture and no audio.
If one of the participants uses another SIP-Client application (e.G. X-Lite, audio only). That one is able to receive the audio comming from the Sip communicator. But with SIP-communicator I can't here anything.
In our setup our clients are behind a NAT-firewall.
My questions are:
Is sip communicator working with NAT?
Is JMF set up correctly? Especially - does RTP have to be enabled somehow. If yes how.
Thanks in advance and best regards