Reliability

The Problem :

• FIBER CUT - Jan, 4, 1991 - New York metro area
  • 6 million homes without long-distance service
  • New York Mercantile Exchange and New York Commodity Exchange shut down

• SS7 FAILURE - June, 10, 1991 - California
  • 2 million homes without phone service

• SS7 FAILURE - June, 26, 1991 - Baltimore
  • 10 million homes in 4 states without phone service
  • U.S. government phones affected

• SS7 FAILURE - June, 26, 1991 - California
  • 3 million homes without phone service

• SWITCH FAILURE - June, 26, 1991 - South Carolina
  • 150,000 homes without phone service

• SS7 FAILURE - July, 2, 1991 - Pennsylvania
  • 1 million homes without phone service

• POWER FAILURE - September, 17, 1991 - New York metro area
  • 2 million homes without long-distance service
  • 3 major New York airports close for 6 hours

• FIBER CUT - September, 23, 1991 - Miami
  • Miami International Airport closes