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    Configuring Time (NTP) Settings

    The router can be configured to synchronize its internal clock with a time server on the Internet using the Network Time Protocol (NTP). If NTP is not enabled, the router synchronizes with GNSS. If both GNSS and NTP are enabled, NTP time will be used.

    Time Source

    Under Time Source, you’ll find what protocol is providing the system time. In the example above, the time source is NTP (NTP is the priority when both NTP and GNSS are available). If the NTP server cannot connect but GNSS has a “fix acquired”, the time source will be GPS-NMEA. When both NTP and GNSS are down, the time source is NITZ, which comes from the cellular network (when the cellular radio can retrieve it).


    Under NTP, you can configure AirLink OS to use your own NTP Server or another NTP Pool.

    • SERVICE: Enables NTP update of the system time. When disabled, the system time comes from GPS-NMEA if a location antenna is connected, or from the cellular network.

    • MINIMUM POLLING INTERVAL: Sets the minimum interval between requests sent to the server(s). The polling interval settings control the number and frequency of NTP packets sent from the router.

    • MAXIMUM POLLING INTERVAL: Sets the maximum interval between requests sent to the the server(s).

      To change a polling interval, click X to clear the current setting, and then click the empty field to display the list of available intervals.

    • TRACKING SERVER: Displays the name or IP address of the server to which the router has synchronized. The NTP server may be automatically assigned from the default NTP Pool, or a manually assigned server that you’ve configured below.

    • STRATUM: Displays the stratum level of the tracking server. The stratum level on the router can range from 1 to 15, representing the number of hops away from a reference clock (GPS, atomic clock, or other). Higher stratum levels indicate possibly degraded, less accurate NTP readings.

    • UPDATE INTERVAL: Displays the interval between the last two clock updates.

    • NTP SERVERS: Click an empty line to enter a NTP Server IP address, or fully qualified domain name.

    • NTP POOLS: Click an empty line to enter another NTP Pool.

      • Enter the Hostname or IP address of the new NTP pool
      • Select the maximum number of sources that can be used from the pool. Fewer sources means there will be fewer polling requests sent.