Transcontinental Cable System ["L System"]
The Transcontinental Cable System was developed by ATT Longlines to
support defense related communications during the cold war period. The system was deployed in five sequential configurations, designated L-1 through L-5. The system provided hard wire communications paths for key command and control facilities in the continental United States.
Beginning with the L-4 build, the network was designed to withstand a nuclear attack. The "L" system consisted of over
100 "Main Stations" and 1000 repeater vaults, each designed to withstand a nuclear environment. Main stations also were designed complete with generators, blast doors and housing to sustain the staff for a two-week post-attack period. Most of the system was dismantled in the late 1970's and early 1980's as ground based communications networks were replaced by satellite systems.
Sources and Resources
Maintained by Robert Sherman
Originally created by John Pike
Updated Tuesday, December 01, 1998 5:57:03 AM