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Testbeds are essentially laboratory scale demonstrations and field trials. Several testbeds have demonstrated circuit switching in optical broadcast and select networks. One such example is the IBM's Rainbow which was designed to support 32 wavelengths separated by 1 nm in a star configuration. The testbeds could achieve bit rates of 1 Gb/s wavelength. The testbed Rainbow II successfully demonstrated support of four wavelengths at this speed. Wavelength routing has been successfully demonstrated in several testbeds, like AON, NTT Ring etc. In the following we briefly describe the All--Optical Network Consortium's testbed, which has been deployed in the Boston metropolitan area.