The document introduces the features and characteristics of the EM-C201 10/100Base-TX TO 100Base-FX managed card-type optical transceiver from LuBiTeKe Technology (Beijing) Co., Ltd., including support for fast Ethernet fiber conversion from 10/100Base-TX to 100Base-FX, hot-swappable support, compliance with IEEE802.3/IEEE802.3u/IEEE802.3x standards, support for automatic MDIX and auto-negotiation, support for full-duplex and half-duplex operation, and flow control.