Cody was able to remote into my computer and then into the grandstream. Outgoing calls work great, but incoming calls, when picked up get a fast busy signal.

My parents have Uverse for internet, and the grandstream is plugged into the LAN port of the Uverse router. I have a static IP set to the grandstream, and the updated UDP ports forwarded.

Anything else I can check in the Uverse router?