I have just started looking at the RTI keypads and when they are engraved and all fixed up, I will have say it is very impressive look. What parts are involved in a typical system to control RadioRa or say UPB? Could a processor handle a house full of keypads? What physcial connections are made at each keypad? I would assume with upb that you would just use 232 to CIM to fire links confingured with Upstart? but how do the keypads communicate to the processor? How is it configured with RadioRA? Could you remote the RA switches and have RTI keypads on the wall through the whole house? Thanks for any comments.