If you have internet, and phone threw cox, request from cox a D3 eMTA. You may be able to pick one up from a local cox store. The only current D3 eMTA that I am aware of that cox uses, is the Cisco DPQ3212. I don't think cox will even attempt to provision a eMTA modem if its not one they supplied. As for the eMTA not being listed on the modem support list, cox doesn't list them, as its something they only supply, and not something the customer is able to buy, and have provisioned.