I have a BT Home Hub providing my ADSL & radiating / receiving wifi. However
I have a distributed site with several buildings well out of range of the BT
Home hub, all of which are linked by CAT5. So far I have suffered using
various wireless hubs cat5 connected, but it is a pain having different
ssid's etc and none are particularly reliable, needing occasional rebooting.

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. I
don't really want a boosted full site wifi set up for security reasons.

(Although extensive this is essentially a home set up not a business, so the
budget is limited.)

AWEM