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