TP-Link Gigabit WDM Media Converter is able to convert between electrical and optical signals, providing a gigabit RJ-45 port and a gigabit SC fiber port. WDM (wavelength division multiplexing) technology enables the media converter to send and receive data simultaneusly using only one single mode fiber through two channels of different wavelengths, with stong anti‑interference ability. The maximum transmission distance can reach up to 2 km or 20 km, varying among different models. The media converter of model A can work in pair with model B, with one device transmiting signals of 1550nm wavelength and receiving signals of 1310nm wavelength, and the other vice versa. In other scenarios, a single media converter can connect to an SFP module and an RJ-45 port of another device, flexibly fit into diverse network topology. Besides, this media converter can work as a standalone device (no rack required) or with TP-Link’s TL‑FC1420 rack for central management and power supply.