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