[Include(PhotoRequest)] Pics please! Inside if possible (rack porn). This is the main tandem office for central offices in the San Francisco area and the toll office for long distance calls on AT&T. Supposedly, the National Security Agency has a room in this building where they illegally listened to peoples phone calls and the Electronic Frontier Foundation sued them because of it. Like most telephone exchanges, it has noticeably few windows. For more information, see http://thecentraloffice.com/Calif/SFO/San%20Francisco.htm.