Fast Internet Service

Well I got Comcast high speed yesterday. It works great but sometimes I lose my IP address. It's so fast that I cannot believe it. I works through a modem that also works for the phone. I can't believe how fast they hooked it up. They just disconnectd Quest on the pole and connect the cable and then they ran the phone cable to the modem for the computer. They didn't have to rewire anything. And it worked for all four phones in the house. I now have free long distance, call waiting, caller ID, conference calling, blocked number calling etc.