The RS232-X21IP is a self powered interface converter (extracts opearting power from interface itself) that allows full conversion between RS-232 and X.21 interface. The converter can operate without any external power supply, getting its voltage from operating interfaces. Device is very simple to install, only DCE/DTE selection switch must be set appropriately for smooth operation. Features of RS232-X21IP Interface Converter: Baud Rate: up to 2Mbps DCE/DTE device setting switch self powered converter Technical Specifications: Connectors: RS-232 DB25 female connector, X.21 DB15 connector via adapter cable LEDs: Signal status, DTE/DCE mode, External DC power Power: Interface powered or external 9V DC/600mA power acceptable Temperature: 0-50§C (Operating), 20-70§C (Storage) Humidity: 5%-90% non-condensing Power consumption: less than 5W Dimensions: 80mm x 140mm x 25mm Weight: 150g Product Sheets: Data Sheet Installation Manual