What This Product Does\n TL-FC111B-20 is a 100M media converter, providing a 100M RJ-45 port & a 100M SC fiber port, which can convert between electrical & optical signals. & long-distance data transmission through optical fiber can be applied to commercial scenarios such as park security monitoring & wireless networking.\n\n How This Product Works\n TL-FC111B-20 adopts WDM (wavelength division multiplexing) technology, helping send & receive data at a distance of up to 20km (12.4 miles) over only one fiber, which saves half of the cable deployment cost for customers. TL-FC111B-20 transmits data at 1310nm wavelength & receives data at 1550nm wavelength on optical fiber. The TL-FC111A-20 works in the other end as a pair by receiving data at a wavelength 1310nm & sending data at wavelength 1550nm.\n\n Other Features\n Besides, this media converter can be used as a standalone device (no rack required) or used with TP-Link&153;s TL-FC1420 rack for auto MDI/MDI-X in TX port in which duplex mode is automatically negotiated.\n\n\n\n\n\n Product Model: 10/100 Mbps WDM Media Converter\n\n\n