Growing vulnerability of the public switched networks : implications for national security emergency preparedness : a report - McDonald, John C., 1936- (National Academy Press, 1989)
Committee chairman: John C. McDonald.
Keywords: Telecommunication systems.; Emergency communication systems -- United States.; National security -- United States.; Telecommunication -- United States -- Switching systems.; Systèmes de télécommunications.; Systèmes de communication d'urgence -- États-Unis.; Télécommunications -- États-Unis -- Systèmes de commutation.; telecommunication systems.; COMPUTERS -- Information Theory.; TECHNOLOGY & ENGINEERING -- Signals & Signal Processing.; Emergency communication systems; National security; Telecommunication -- Switching systems; Telecommunication systems; United States