Mark Klein's Evidence: "SIMS, Splitter Cut-In and Test Procedure"

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Former AT&T technician Mark Klein is the key witness in the Electronic Frontier Foundation's class-action lawsuit that alleges the telecommunications company cooperated in an illegal National Security Agency domestic surveillance program.These two pages, excerpted by Klein from a 44-page document, purportedly show AT&T re-rerouting its high-speed data circuits through the splitter cabinet that performs the physics of the alleged wiretaps. The work was apparently overseen by AT&T's Network Operations Center in Bridgeton, Missouri. "'SIMS' is an unexplained reference to the secret room" in which the equipment was stored, Klein wrote.
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