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Verizon, Nokia Siemens close in on 100 Gbps networking

Thu, 09/25/2008 - 8:20am
Brian Santo

Verizon and Nokia Siemens Networks said they’ve been successful with a test of 100 Gbps transmission on a single wavelength for more than 1,040 kilometers over field fiber.

The pair claim the feat sets a new distance record, and demonstrated better performance than conventional transmission.

The field trial, conducted on optical fiber on the Verizon network in north Dallas, showed that 100 Gbps signals can be simultaneously transported with 10 Gbps and 40 Gbps signals on the same system.

Verizon used Nokia Siemens’ hiT 7500 ultra-long-haul, dense-wavelength-division-multiplexing (DWDM) platform, combined with multi-level modulation, polarization multiplexing and coherent detection. The two reported better chromatic dispersion and polarization-mode-dispersion tolerances than conventional systems.

The results indicate that a typical 80-channel ULH DWDM system can simultaneously carry any combination of 10-, 40- and 100 Gbps traffic. Verizon said the practical result is that current network configurations can support capacity upgrades to 100 Gbps per channel on existing routes over similar distances without modification to the physical network, providing quicker, cost-effective implementation.

Service providers of all kinds are working toward the commercial introduction of 100 Gbps networking.

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