Hopefully someone can pin point this issue. A few times a month, my wife will call me from her cell phone to our home number (VOIPo).

She will get a busy signal on her end, but it will ring 2-3 times on my end, and I pick up and get silence. I then hang up the phone and then my phone goes CRAZY. It will ring and ring and ring until I reset the phone adapter.

This happened last night, and is starting to get a little pissed at me.

We have AT&T DSL going into an Asus Router, and a grandstream HT502 phone adapter behind the router.

I have UDP/TCP ports 5004-65000 forwarded to the phone adapter with a static IP assigned to the adapter as well. Do I just need to set those port forwards to UDP?

Any suggestions at all? TIA.
Justin