Room 641A

room 641a

Room 641A is an intercept facility operated by AT&T for the U.S. National Security Agency (NSA), beginning in 2003. It is fed by fiber optic lines from beam splitters installed in fiber optic trunks carrying Internet backbone traffic and, therefore, presumably has access to all Internet traffic that passes through the building.The existence of the room was revealed by a former AT&T technician, Mark Klein, and was the subject of a 2006 class action lawsuit by the Electronic Frontier Foundation (EFF) against AT&T. Klein claims he was told that similar black rooms are operated at other facilities around the country.

The EFF suit accused the telecommunication company of violating the law and the privacy of its customers by collaborating with the NSA in a massive, illegal program to wiretap and data-mine Americans’ communications. Room 641A is located in the SBC Communications building at 611 Folsom Street, San Francisco, three floors of which were occupied by AT&T before SBC purchased AT&T. The room was referred to in internal AT&T documents as the SG3 (Study Group 3) Secure Room. The room measures about 24 by 48 feet (7.3 by 15 m) and contains several racks of equipment, including a Narus STA 6400, a device designed to intercept and analyze Internet communications at very high speeds.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.