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