How do I handle two users trying to use the system at the same time?
Remtron offers two features to help management multiple transmitters with a single receiver: First-Come/First-Serve and Pitch/Catch.  Under First-Come/First-Serve the receiver recognizes and serves the first transmitter to initiate communications until that transmitter is turned off.  Then it serves the next transmitter to initiate communications.  Under Pitch/Catch the receiver only recognizes and serves one transmitter until that transmitter releases the receiver to another user.