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