I am having problems with the spa504g. This problems doesn't happen with spa508G neither spa303 or linksys spa942. It happens with two different units and al least one has been upgraded to the latest firmware.
The problem is that the spa sends a port in the sdp (both invite and 200 OK) that is in the range of RTP port min and RTP port max, but the port that it uses is completely different.I have many tcpdump that I attach. It indicates in the sdp port 16424 but it uses port 1025.
The spa504G utilizes TCP for SIP signaling, but this behavior is the same with UDP signaling. And always uses port 1025 (the other spa always uses port 1057)
Any idea anyone?, how can I open a trouble ticket with Cisco?