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Integrated Global Navigation Satellite System (GNSS) on ACX500 Series Routers

Global Navigation Satellite System (GNSS) is a navigation aid system that uses signals from satellites to calculate the actual position of a GPS-capable receiver. These signals are not only used for determining the position of the receiver on Earth but also as a very accurate time base.

The ACX500 series router has the GNSS receiver integrated into the system. This eliminates the need to have an external GPS receiver. However, you will need a GPS antenna. The ACX500 series routers support GNSS input through SubMiniature version A (SMA) connector. You can configure the GNSS port and its associated parameters at the [edit chassis synchronization] hierarchy level.

You can configure the GNSS port by including the constellation gps] CLI statement at the [edit chassis synchronization port gnss] hierarchy level. If you do not specify a constellation option, then the gps constellation option is considered by default.

The following is the [edit chassis synchronization port gnss] hierarchy level:

Note:
  • The range for cable-length-compensation is from 0 to 50000000 nanoseconds.

  • The integrated GNSS receiver in the ACX500 series routers do not support 10-MHz frequency input and output.

ACX500 series routers support reference clock functionality with the integrated GNSS receiver.

Use the show chassis synchronization gnss command to check the status of the GNSS receiver. For more information, see show chassis synchronization.