| http://www.w3.org/ns/prov#value | - upstream frame; (4) said remote unit ranging circuitry structured to respond to said second reply message by transmitting an ID code comprising a start bit which is always a 1 and a predetermined number of ID bits a predetermined number of which are Is and the rest of which are 0s, with a 1 being defined as the transmission of a Barker code in a gap and a 0 defined as the lack of transmission of
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