This is for establishing a professional NTP Server forWindows NT as well as a NTP Client for Win95/NT foraccurate time synchronization via the network (LAN/WAN)from any NTP server. For getting the presize time periodically (without depending on an internet connection) to use the NT server as a NTP time reference server, we supply a GPS (worldwide) or a DCF77 (central Europe) receiver which can be connected to the server via a serial port.