cryptolog_73_page_18

cryptolog | 73 page 18 | https://thedailydialectics.com/pdfs/FIOA/cryptolog_73/cryptolog_73.pdf

DOCID: 4009853 OPTICAL FIBER OPTICAL FIBER COMMUNICATIONS (NEC) (U) Initial applications of optical fiber were for specialized applications, such as the communications circuits (see figure 21) that were installed with buried power cables. The fibers were unaffected by the powerful elec- trical…