(In a nutshell: "Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency, beginning in 2003, and exposed in 2006. [...] It is fed by fiber optic lines from beam splitters installed in fiber optic trunks carrying Internet backbone traffic [...] contains several racks of equipment, including a Narus STA 6400, a device designed to intercept and analyze Internet communications at very high speeds.")
(In a nutshell: "Room 641A is a telecommunication interception facility operated by AT&T for the U.S. National Security Agency, beginning in 2003, and exposed in 2006. [...] It is fed by fiber optic lines from beam splitters installed in fiber optic trunks carrying Internet backbone traffic [...] contains several racks of equipment, including a Narus STA 6400, a device designed to intercept and analyze Internet communications at very high speeds.")