Deutsche Telekom Begins Testing 40 Gbps Optical Network with Siemens

Deutsche Telekom began testing a purely optical transmission network operating at rates up to 40 Gbps. Siemens is a partner in the field trial. The WDM network operates along a route almost 1,000 kilometers in length and uses flexible optical add-drop-multiplexers. The testing by Deutsche Telekom will also include the use of wavelength converters (transponders) which operate with tunable-laser technology.
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