Nortel Networks Enhances OPTera Long Haul Portfolio; Raman Amplification Drives Reduced Costs for High Capacity Submarine Optical Backbones

HANOVER, Germany–([1])–March 13, 2003–Nortel Networks (NYSE:NT)(TSX:NT) today announced new, customer driven enhancements to the Nortel Networks OPTera Long Haul portfolio for use in un-repeatered submarine applications.Extended, un-repeatered submarine links of up to 350 kilometers can now be achieved through Raman amplification, a network component that boosts the optical signal to achieve greater distances. This eliminates the need for costly submerged repeaters, therefore driving lower capital and operational costs when compared to traditional submarine solutions.

With Philippine Long Distance Telephone Company (PLDT), a Nortel Networks un-repeatered optical long haul platform has been successfully deployed in a large scale project in Asia as part of a previously announced contract.

“With Nortel Networks, we’ve shown that putting highly-reliable, high-capacity links across the sea can be cost-effective,” said George Lim, senior vice president, PLDT. “Nortel Networks un-repeatered optical network solution links directly into our terrestrial optical network with common management and functionality as if the sea didn’t exist, offering the opportunity for great operational savings.”

Submarine communications systems with no repeaters or other submerged active equipment are known as “festoon networks.” Festoon networks can be deployed with frequent connections across stretches of water, or with underwater cable instead of standard terrestrial links for more cost-effective connections along stretches of coastline.

Nortel Networks OPTera Long Haul un-repeatered platform is also aimed at terrestrial applications where constructing and maintaining repeater sites can be prohibitively expensive, as is the case in mountainous or densely forested regions.

The OPTera Long Haul un-repeatered platform is currently offered with a range of modules and configurations to optimize reach and capacity. The enhancements announced today will allow a single optical link of up to 350 kilometers, with capacity scaling from 10 to 800 gigabits per second (Gbps) per fiber pair.

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