RMC-121FB-MM-SC Industrial Rack mount card type Ethernet to fiber media converter with 2×10/100Base-T(X) and 1x100Base-FX Datasheet Manual Firmware FeaturesEach converter supports two 10/100Base-T(X) ports with autonegotiation and auto-MDI/MDI-XSupport Ethernet to fiber port conversion for long distance communication2 x 10/100 Base-T(X) ports to save the usage of copper portsSupport store-and-forward transmissionHot-swappable, high reliability and easy installationUp to 18 slots of high-density installation in RMC-1000 chassis on the 19-inch rack