It makes total sense that you might have to use an IR interface -- LED to sensor -- to interconnect different IR systems. To begin with, one system might work with a 12 volt supply (Xantech) and another with a 5 volt supply (don't know, could happen).
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
