{TAIL ~ Communication device} with circuitry to promote cascade series connection including identification of {HEAD ~ device position} in the series and sensing the end device in the series 
{ TAIL ~ Communication device } with circuitry to promote cascade series connection including identification of { HEAD ~ device position } in the series and sensing the end device in the series
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH