Learn how to match SFP modules with your switch or media converter by checking compatibility, speed, fiber type, wavelength, and distance. This is the first of a pair of technology tutorials on all-optical switching by Geoff Bennett, vice president of technology advocacy at Marconi PLC (Nasdaq/London: MONI). This tutorial covers the all-optical switches themselves – the various types, how they differ from electronic switches, where. Connecting an optical switch using USB or RS232 is easy because FlexDCA automatically detects the switch as soon as the USB cable is connected to the PC port's USB connector. To ensure that the switch is detected by FlexDCA: Turn the switch's power on. This guide helps network and reliability.