Thursday, May 16, 2013

Telefónica Tests Long-haul IP-over-DWDM with Cisco

Telefónica Global Solutions completed a long-distance, 100 Gbps IP-over-DWDM (IPoDWDM) technology trial with Cisco.

The trial used integrated coherent 100 Gbps optical interfaces in the Cisco CRS Carrier Routing System (CRS) to generate a standards-compliant 100 Gbps "alien wavelength" directly into Telefonica's existing submarine network between Boca Raton, Florida and Puerto Rico. The total distance was a record-setting 4,000 kilometers (nearly 2,500 miles). The underwater round trip span consisted of DWDM transport systems from multiple vendors – the longest such IPoDWDM test ever completed. Additional shorter tests using only terrestrial fibers were also successful.

Cisco said that integrating the DWDM components into the router eliminates the need for a costly external transponder.  Its nLight coherent technology also eliminates the need for additional dispersion compensation units and electrical and optical regeneration equipment that cannot be added to an existing submarine cable links. This helps further reduce capital and operational expenses.

"Integrating long-haul transport interfaces such as coherent 100Gbps IPoDWDM into routers lowers capital expenses while helping to ensure that bandwidth demands on service provider core networks can easily be met. Proving that our nLight silicon works to 4,000 kilometers shows that IPoDWDM is ready to be deployed on many of the world's submarine and terrestrial links," stated Bill Gartner, vice president and general manager, High-End Routing and Optical business Unit, Cisco.


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