Previous slide Next slide Back to the first slide View text version


In 1995, data rates of installed fiber is about 2.5 gigabits per second on the SONNET trunks. Laboratories have demonstrated 200 gigabits using different wave lengths or frequency division multiplexing. So the laboratory data rates are growing at 62% a year. This means it doubles every 18 months just like Moore's Law for semiconductors or magnetic disk density. But then the actual installed capacity is doubling every two years. So it just doesn't ring true. As subscribers, have we gotten any more bits from POTS for decades?