TARDIS Communication Network

This is a rather obvious question, I'm sure, but any attempt to research it myself has only confused me more.

There must be some rule about knowledge of the future, and what one should do about it. Ignore it, presumably, but it seems like that would be easier said than done.

Would anyone mind telling me just where in the hell I am, and why my pager doesn't seem to be working? I mean, don't get me wrong. I don't mind the pager not working if it means I don't have to deal with Newbie paging me time after time after time after time with the same annoying eety bitty problems that a monkey could solve. But since I've never been here before and I'm not even sure where here is, I think I'd like someone to tell me what's going on. Hmmkay?