I got a bug report in our bug report tracker for Asterisk that claims that SER changes the call ID by adding a :port after the IP address.
From reading the RFC, I don't think it's a valid change. For me, it's a new call ID.
Questions: - Is changing a Call ID permitted within a dialog? - Does SER/OpenSER actually do this?
http://bugs.digium.com/view.php?id=8220
See you at the Summit in Berlin!
regards, /Olle