- If you put the radio RRC in the DMZ, then you don't need port forwarding. Somethings doing both
causes problems (rare, but I have seen it happen)
- You don't need to put the control RRC in the DMZ or forward its ports, but this is not the cause of
your problem
- make sure you are using the dynamic DNS address or the correct external IP address in the SIP contact
and not the internal IP address
- make sure that SIP ALG is turned off in the router. Judging by your specific problem, this may be your issue.
- turn off any firewall on the router to see if this solves your problem. I had exactly that issue at this QTH I am
currently at now in Florida.
73,
Mitch DJ0QN / K7DX