The SX/SX+ product range provides high-performance, intelligent, expandable connectivity system for 8 to 128 serial devices. The SX+ range consists of an adapter card, (which installs inside a server), and external 8 port SX Device Concentrators available with a range of connectors for RS232, RS422 and parallel printer applications. The system is easily expandable up to a maximum of 32 ports when 4 Device Concentrators are used. The SX+ range delivers optimum performance in multi-user systems and remote access server environments. The SX+ range is ideal for connecting modems, printer, E-POS devices, industrial control and management and many other peripheral devices. It is a strong solution for applications based on UNIX or Windows NT operating systems.