Bell Labs Claims It Breaks Data Delivery Record

New York: | Updated: Mar 25 2002, 05:30am hrs
Bell Labs, the research arm of Lucent Technologies Inc said on Friday that it has doubled the distance and the speed at which data can be sent over long-haul telecommunications networks.

The development will eventually make it cheaper for telecommunications service providers to send more data on fiber optic networks over longer distances.

Bell Labs said that, in a demonstration, it sent a massive 2.56 terabits of data per second over a distance of 2,500 miles, the equivalent of sending the contents of 2,560,000 novels every second across the United States. One terabit is a little over 1 trillion bits of data. The previous record was 1.6 terabits per second over 1,250 miles, or half the distance.

Bell Labs achieved the 2.56 terabit-per-second speed by sending 40 gigabits-per-second of data over each of 64 separate channels in fiber optic cable, which uses light waves to carry data. It used dense wave division multiplexing, a technology that allows service providers to push bigger chunks of data onto a single strand of optical fiber.

The capacity and distance improvement was made possible by use of a coding scheme called differential phase shift keying, which Bell Labs has developed for high-capacity communications. Lucent’s long distance networking product, LambdaExtreme, cannot support the higher data speeds.