Quote:
Originally Posted by ladude626
I believe it's using the standard UDP. I'm going to try enable DMZ on my router and see what happens because port forwarding doesn't seem to be working.
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I asked about tcp because I saw tcp mentioned on two different lines in the SDP packet sent by your SIP unit. One was in a Record-Route line (inserted by Voxalot). The other instance was at the end of a Contact line (written by your sip unit). Both lines are shown below (I changed your Voxalot number and IP address).
Record-Route: <sip:64.34.163.35;transport=tcp;lr;r2=on;ftag=dhbd b>
Contact: <sip:123456@98.99.100.101:2473;rinstance=e14c88765 fa01a20;transport=TCP>
I am not sure if TCP transport is possible with Voxalot, but if TCP transport was being used and you were forwarding only UDP ports, that may explain why port forwarding didn't work. TCP transport is unusual for VoIP, I have not noticed any mention of it in SIP packets before this instance.