Sync Source Selection

The synchronization source selection provides a priority selection and revertive feature support for the TCA8000/8500 Timing Server. The selected clock source is used to provide the clock reference for the IEEE1588v2 (PTP) event messages along with the external timing ports that is, T1/E1, 10/5/1 MHz and Pulse-per-Second (PPS).

The TCA6000 Timing Client should be configured for “ptp” that is, the IEEE1588v2 recovered timing. The TCA8000 Timing Server has multiple source selections. GPS is a Stratum-1 source and should be used as the highest priority sync source selection. The T1/E1 BITS inputs can be used as a secondary source.

When the currently used highest priority synchronization source is lost, the Timing Server immediately starts to use the next available lowest priority synchronization source irrespective of the revertive feature configuration. When the highest priority synchronization source becomes available and the currently used lowest synchronization source is lost, the Timing Server immediately changes back to the highest priority synchronization source irrespective of the revertive feature configuration. When the highest priority synchronization source becomes available and the currently used lowest synchronization source is available, the Timing Server changes the source on the basis of the following conditions:

Note:

  • If the Timing Server uses the internal synchronization source and the highest priority synchronization source becomes available, then the Timing Server immediately starts to use the highest priority synchronization source irrespective of the revertive feature configuration.
  • Only an Admin user can set and view the revertive feature configuration.