PresenTense Server is a network time server with support for secure NTP version 3 and 4, SNTP and Unix-Time. PresenTense Server features user-level security and email-based error notification. Hardware clock support includes generic satellite clocks via the NMEA 0183 protocol, WWVB radio clocks and DCF77 radio clocks. Drivers are available for industrial GPS clocks from Arbiter Systems, Spectracom, Hopf and Ultralink. Drivers for consumer GPS units include the popular Garmin III Plus and Garmin 5. Includes NTP key generator, and NTP troubleshooting software. If you require industrial grade network time synchronization, PresenTense Server is for you.