Primary Alert System

The Primary Alerting System (PAS), was a network of land-line connections used by the Strategic Air Command (SAC) for command and control of its nuclear forces.

PAS provided immediate and simultaneous voice communications to all (SAC) unit command posts and missile launch control facilities.

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SAC Primary Alert System laydown
Original "Red Phone" for the SAC PAS. Installed by the Bell System at the Offutt AFB underground command post in June 1959. Now on display at the SAC museum.