My modem on the S8700 keeps dialing out. In the maintenance web interface it gives 3 options. Disable modem, enable modem for 1 incoming call, & enable modem for unlimited incoming calls. The only way I can stop the modem from dialing out is to disable modem. When I enable it in either setting it goes back to dialing out every 5 minutes. Is there a way to restrict this from happening. Thanks