SONET Ring is Culprit in Air Tower's 2-Hr. Blackout

摘要

Nearly two hours without phone service ... 200 planes stranded in the air ... More than 100 flights grounded, delayed or diverted in a dozen cities ...Before the telephone, radio and radar blackout at the Federal Aviation Authority's Memphis air traffic control center on Sept. 25, the FAA and just about any communications technology professional who counts on uninterrupted telecom service would have confidently told you the same thing: A SONET ring is a solid, dependable way of making sure your network maintains redundancy in a disaster.