Thanks for the idea! I tried typing 127.0.0.1:5060 into SIP Port textbox, but the software will only let me type numbers. Periods and colons are not allowed. Am I doing something wrong?
127.0.0.1:5060 goes in the softphone config (NOT the OBiAPP). The idea is to change the 5060 to anything else, perhaps 5065.
You need to make changes in 2 differents places:
1) Softphone (Domain + proxy address)
2) OBiAPP (Advanced tab Sip Port)
This may not solve the problem, just something to try in case you have something else using port 5060.