The PDS-220Fx series is a family of Programmable Device Servers, also known as "Serial-to-Ethernet gateway”, that are designed for adding optical fiber connectivity to RS-232/422/485 devices. The fiber-optic communications permits transmission over longer distances than other forms of communications because of the signals travel along them with less loss and no crosstalk. The PDS-220Fx series includes a powerful and reliable Xserver programming structure that allows you to design your robust Ethernet applications in one day. The built-in, high-performance MiniOS7 boots the PDS-220Fx up in just one second and gives you fast responses.