RTU-EN01 is able to auto-detect 10/100 Mbps transmission speed; MDI/MDI-X auto-detect, supporting 16 digital I/O modules (max. 256 I/O points) and 8 analog I/O modules, maximum 16 Modbus TCP connections, Modbus TCP/Modbus gateway (supporting Master mode, able to connect to max. 32 devices) and parameters can be set up on the webpage.