Comcast only gives you a choice if you don't have their voice service, otherwise they force you to rent a modem (EMTA).
I read recently that Comcast would allow you to provide your own EMTA, but when a friend of mine tried to sign up for voice online
, it said a rental was required and automatically added the $7 charge to his "cart". He decided to not go with Comcast voice because of that.--
The Comcast Disney Avatar has been retired.