PresenTense Time Server Publisher's description:

Windows time server. NTP, SNTP and GPS devices. Easy to install, robust and accu

PresenTense Time Server is a high performance Windows time server supporting NTP and SNTP protocols. PresenTense Time Server will synchronize your PC to a primary time source such as an atomic clock on the internet or an inhouse GPS reciever and offer time services to clients on your LAN or WAN. Most leading GPS and Radio hardware clocks are supported via the serial port. Supports Free Run so that you maintain accurate time even if your internet connection goes down or your reference clock fails. Algorithmic filters achieve extreme accuracy. Installation automatically configures default time servers so in most cases, you have an operational time time server after the install is complete. SMTP AUTH and SysLog notification if an error condition should arise. Fallback to an internet based time server if local GPS hardware fails. Robust COM port error handling, including USB disconnect recovery which occurs on many virtual COM ports shipped with GPS's. Configurable update of CMOS / BIOS clock to avoid time drifts which can occur when you reboot modern motherboards.

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