Rose MS-9P serial switch box

9-Port Parallel, Any Port to Any Port Data Switch, C36 Centronics Connectors The Master Switch is a versatile product for interconnecting your computers and peripherals using the common serial (RS232) and parallel (Centronics) interfaces of your equipment. The switch accepts over 20 commands for controlling the flow of data. It may also be used automatically or be controlled by interactive menus. Applications for the switch include office automation, CAD/CAM, machine control, data collection, data communications, telecommunications, retail point-of-sale, and others.