Sofia-SIP is not seeing the ACK.

It looks like the problem I had before & I don't remmeber how I solved it.

ACK UDP packets not getting through to the UA process. Strange that it works for FreeSwitch.

FreeSwitch's ACKs going to port 5080. That's probably why it works. What's special about port 5080?

Easiest quick fix is probably to get my app to use port 5080, the same way FreeSwitch does.

Would be good to find out why this is neccessary though.