said by Tryin2help :

Actually I have tried resetting the modem. I did all this when the tech was present. I haven't tried to boot into safe mode with networking because the nic doesn't even try to get an address. The modem shows no link and windows shows that a network cable is unplugged. So its not even registering that a network cable is plugged in. This happened with the on-board nic and a PCI nic. I am at a loss.

said by AnonGuy :

If you have another network device, like a switch or router, try plugging the Dell into that. If the Dell still says "Network Cable Unplugged" then your onboard NIC may be bad. Try picking up a NIC for a few bucks at Circuit City and see if that fixes you up.

said by EG :

Completely remove the backup battery from the Arris and disconnect it from the A.C. power source and turn the computer off.

Wait a few minutes, then plug the Arris back in and let it fully sync. Now power up the computer.

Any joy ?

Sometimes there are issues with the proper functioning of the reset buttons with the Arris telephony modems.

You should get a router so that you don't have to worry about powercycling the modem each and every time that you want to change the device that is being directly connected to it.

said by Tryin2help :

This was done when the tech was here. We unplugged the modem and took out the battery. No Dice. Still cable unplugged.