Cisco IP PHONE SPA504G keeps losing registration, the only way we get the phone back up and registered is to unplug the ethernet cable from the phone. Once removing and re-plugging the ethernet back in the Phone comes back up online and grabs the registration. I can't figure out why it continues to do this. We've had the Comcast Business Wireless Gateway replaced. Our SonicWall is configured correctly as far as I can tell. Our smart switches are running efficiently. I'm just stumped why this keeps happening..
