On Mon, 17 Dec 2012 08:05:27 -0000, Andrew Mawson wrote:

Is there a 'range extender' that will sit on the cat5 network and
re-radiate/receive the BT Hub transparently in each of the buildings.

That is what your collection of ethernet connected wireless hubs already
do. You can get "range extenders" that takes the existing WiFi signal and
re-radiates it. These boxes don't need an ethernet connection but do need
to be in range of the "host" WiFi box. They also halve the the through
put at the same time. You'll still see a 54Mbps link or WHY but if you
actually try to use 54Mbps you won't be able to.

Have your tried setting all your APs to the same SSID, channel and
security (type and password)? I have a sneaky feeling that it can all
just sort itself out, certainly at places I visit a "site survey" shows
many AP's all with the same SSID, channel and security just different
signal levels. The WiFi in such places works... To avoid too much in the
way of RF collsions try to reduce the places where you can see signals or
roughly the same strength from differnt APs.

--
Cheers
Dave.