HDX 4000. When I call any remote endpoint I can connect but do not get any audio or video from the remote endpoint. I only have one "real" person to whom I can connect and they report that they get no video or audio from me, either.
If I connect to an endpoint (I tried with the Polycom trial software) I can establish the connection without difficulty.
This tells me that it is likely to be a firewall issue, but my firewall is configured to allow the traffic. Through. I can see that the TCP connection is established, and that I am sending UDP packets, but am not seeing any traffic, UDP or TCP, returning from the remote site (using packet capture on the SonicWall).
Generally is a firewall issue, maybe the firewall on the far end is not properly configured?
You can test to the Gary Miyakawa test sites:
188.8.131.52 and .158
Still no luck. Those two other servers never answered. Of the servers that do answer, there is no RTP traffic flowing back - my firewall doesn't see anyting at all coming back.