I have another basic question about IR repeater systems. How do IR repeat systems handle multiple receivers? Why do I ask this question? If I wiring up a 3rd party device to send IR trigger codes to an RP-6 how is artibration handled on the IR bus or is it just a free for all. Do all these systems just assume that no two IR command will be sent at once or is there some handshaking. I have read everything I could find on IR repeaters and this issue is never addressed? From circuits I have looked at I do not see anything but I am not familar IR transmitters/receivers.