I don't know; I have always thought they use the regular cable modem for that. I could be wrong on this though.
$5/month with no headache; you think that's expensive?
Right now im paying comcast $5/month to lease a modem. I would like to get my own and quit paying for it. However, I only have phone service with them and i cannot find anywhere a place with i can buy a telephone modem (thats not used). Does anyone know where i can find one?