I have been using a pair of wireless modems for just this, they are on the
somewhat slower side, maxing out at 14.4 in async mode, but atleast I dont
have to roll out long serial cables, I got them for free, meant for some
industrial application, seems they can run as rs485,
http://www.l-com.com/productfamily.aspx?id=2893 . Rather expensiv if its
just to be more conviendent than running cables over the floor.
Regards Jacob Dahl Pind