AT&T's technicians: "We have no idea"

This was the answer given by the AT&T's technicians when asked by what caused the "9-Hour Outage". This happened last Thursday when many IPhone and Blackberry users were greeted with messages like: "Data Connection Refused" and "Could not activate EDGE".

AT&T's EDGE and UMTS data networks were down in 18 states: Florida, Pennsylvania, New Jersey, Delaware, Georgia, Kentucky, Tennessee, Louisiana, Indiana, Massachusetts, Rhode Island, Missouri, Kansas, Iowa, Nevada, New York, Wisconsin, and Illinois. However, voice traffic was not affected.

The causes of this incident (maybe) will be found and revealed in the next days...