Where are these cables exactly? Perhaps they aren't exactly parallel cables but special purpose cables using db-25 ends. However, i thought i saw the signal specs for serial nrz-l or nrzi to be ...
Q: On a road, I saw two cables running parallel across the street a few feet apart. I see these from time to time in various places. Are these used to count traffic, measure speed, or something else? ...
Roebling, firm, wire manufacturers, Trenton, (1925. John A. Roebling's sons co.) siris_sil_246463 ...
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