TP LINK FC111B-20 10/100 Mbps RJ45 to 100 Mbps Single-mode SC WDM Bi-Directional Fiber Converter PORT: 1 100Mbps SC Port 1 10/100M RJ45 Port (Auto MDI/MDIX) SPEC: Full-duplex Tx:1310 nm Rx:1550 nm Up to 20 km Chassis TL-FC1420 Rack-mountable

FC111A-20, FC111B-20, and FC111PB-20 are 100M media converters, each providing a 100M RJ-45 port and a 100M SC fiber port, which can convert between electrical and optical signals. Long-distance data transmission through optical fiber can be applied to commercial scenarios such as park security monitoring and wireless networking.

Take FC111A-20 as an example, FC111A-20 adopts WDM (Wavelength Division Multiplexing) technology, helping send and receive data at a distance of up to 20 km with only a single mode fiber, which saves half of the cable deployment cost for customers. FC111A-20 transmits data at 1550 nm wavelength and receives data at 1310 nm wavelength on optical fiber. Therefore, the terminal device used in conjunction with the FC111A-20 should send data at a wavelength of 1310 nm and receive data at a wavelength of 1550 nm. TP-Link media converter FC111B-20 is one of the products that can cooperate with FC111A-20.

Besides, FC111A-20 / FC111B-20 can be used as standalone device (no rack required) or used with TP-Link's FC1420 rack for auto MDI/MDI-X in TX port in which duplex mode is automatically negotiated.