Tivo hd Series 3

Is it possible to use a cable box with a Tivo HD Series 3 or are cable cards the only option? My cable company's office is currently out of cable cards so I was going to use the cable box I already have in the meantime. I was about to do that but I noticed there is no place to hook up the IR channel changer to change the channels on the cable box. I'm assuming that's not a option but I thought I would ask in case I'm missing something.

Tivo hd Series 3