Similarly, early optical networks were "slowed down" by using electrical switches in the transmission path. ... Computers were not using the first generation optical network. ... First generation optical networks in place at the time were not designed for the bandwidth of today's computer networking and Internet. ... Optical networks were applied to computer networking to transmit the higher payloads in a shorter amount of time. ... Synchronous Optical Network (SONET) used primarily in North America and Synchronous Digital Hierarchy (SDH) used primarily in Europe and Japan are the current...

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