cryptolog_73_page_26

cryptolog | 73 page 26 | https://thedailydialectics.com/pdfs/FIOA/cryptolog_73/cryptolog_73.pdf

DOCID: 4009853 (u) In the U.S., the Bell System has also been very active in building and installing computer-controlled switches. Currently 47 percent of the local subscriber linea are covered by SPC switches, and the coverage in the Bell System by the early 1990's is expected to be 100 percent.…