It makes sense that the FAA would purchase a SONET ring from BellSouth - now part of AT&T - for its Memphis air traffic control center. The tower handled almost 3 million flights last year, ranking it ninth among the 20 centers in the continental U.S. responsible for communicating with planes above 18,000 feet. Several thousand pilots flying over portions of seven states rely on the center daily to keep them from crashing into each other.
展开▼
