Dave Jones wrote:

Things we are considering a Network cables to most rooms,

Don't see the point in going to all that expence when most big technology
companies are producing more and more wireless products.

To give the Frequently Given Answer: because radio bandwidth is
inherently limited in a fixed area, while copper can carry lots more for
a given volume occupied (because the field don't spread nearly so
much!). Even the overblown populariser of things digital, Nicolas
Negroponte, got this one right.

In practice, laying ducting or other easy-access channels is your
biggest win. If not that, structured cabling with last year's "top"
cable spec should give you at least 10 years', prolly much nearer 20, of
usability, from DC (I will shortly be using some of mine for simple
signalling) through to gigabit speeds.

Stefek