AMG816 series Stratum 1 network time servers are designed for 19" rack or desktop mounting using the included rack mounting kit (or wall mount using the optional wall mounting kit) and are ideally suited for providing a highly accurate and easy to configure time source for networks without the need for any online access or subscription services. The integrated GNSS receiver supports multiple user configurable satellite constellation sources including - GPS, Galileo, GLONASS and BeiDou with 33 tracking-Channels and 99 acquisition-Channels. The AMG816 generates a reference PPS output which can provide time information to other AMG NTP or 3rd party devices. If the GNSS signal is lost to the AMG816 the integrated PPS input can accept a reference from another AMG NTP or 3rd party device server and/or use other NTP servers over the network as backup sources providing Stratum 2 NTP during the outage. Available with dual or triple power inputs along with an integrated real time clock with super-capacitor and battery backup ensures maximum available uptime.GNSS antenna is required and are sold separately.