First lines: > The Cheshire ATT facility is an underground complex originally built in 1966. It was an underground terminal and repeater station for the harden

First lines: > The Cheshire ATT facility is an underground complex originally built in 1966. It was an underground terminal and repeater station for the hardened analog L4 carrier cable (coax) that went from Miami to New England carrying general toll circuits and critical military communication circuits Critical military communication circuits implies it was meant to survive a nuclear attack.