Each central unit is adapted to generate/read {TAIL ~ binary messages} transmitted/received in the form of {HEAD ~ radio waves} by the transmit receive module 
Each central unit is adapted to generate / read { TAIL ~ binary messages } transmitted / received in the form of { HEAD ~ radio waves } by the transmit receive module
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH