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