What channels carry pornography?
Depends on your definition of pornography. There's mild porn movies on some of the premium movie channels, and there's nudity on almost all the major channels. More serious porn used to available as pay per view, but I don't think its done anymore.
There are several PPV porn channels, although I'm not sure how hardcore they are, as I've never watched them. By me, there is TEN, Xtasy, Playboy, Juicy, Hustler, Penthouse, and Vivid. There are also some generic PPV channels that seem to be mostly adult stuff, too.