Unfortunately I think that's only for the 4PK / 4PKS, which uses FASST in C2 mode.
http://www.gpdealera.com/cgi-bin/wga...pgm?I=FUTL7633
The 4PK / 4PKS can use the older R603FF and R603FS receivers, but the older transmitters can't user the newer R614FF receiver.