Pulling Wire Through a Central Vacuum System?

call -151 asks: "A friend of mine has a nonworking central vacuum system in her house and I was offering to help her use the tubing as conduits and pull cable to distribute her network throughout the place. Has anyone done this and have any advice to offer? It should go smoothly but I'm sure there are some things I'm not thinking about." Of course, not everone can expect to have a CVS (pun intended) in their own home, but this was just odd enough where it deserved a post. Anyone have any URLs that describe exactly what a Central Vacuum System is, and how it worked?

A link

[JediTrainer]

This article [jlconline.com] has some information about techniques used to INSTALL vacuum systems. It might give you an idea of how the thing might have been built if it was done correctly.

keep using the system

[NevarMore]

Ok this is a bit off the wall, its for the tinkerers.

Run your cat5 thru the pipes, have it all exit to the side of the main pipe. Seal this hole airtight. Now connect a hose to the back end of your computers near the jacks, remove the case fans, and add a filter to the fan holes. Now youve got centralized computer air cooling.

Keep in mind ive never used one of these so, im kind of assuming that these CVS systems are quieter at the ends than a pair of 80mm fans.