@tel #(number)you can instantly get to a certain room, but only if the room is JUMP_OK. For example, to teleport to that room (which is, by the way, Riff's Lab on SluggyMUX) you would type
So what's JUMP_OK mean? It's a flag, or a certain property of an object. The JUMP_OK flag means that anyone (unless they're specifically locked out) can @teleport into that room. And going back to the funky thing next to some room names, it shows up as a J.
To summarize this part: (#296RJ) means that the DB# is #296, it is a Room, and it is
JUMP_OK. To see what other letters mean, type
help flag list.