Mobatime DTS 4020.timebridge, Монтаж и инструкция по эксплуатации

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- Priority 1 source, SyncE, loses reception for more than a minute.
- The sources PTP and Freq. are currently available.
- Time source change mode is set to auto.
During DTS uptime all sources are statistically analyzed and rated according to an
estimated deviation (this means, the more stable a source, the better its rating).
DTS will switch immediately to priority 3 source, Freq., because its deviation is lower
than the one of PTP (meaning in this scenario: PTP is a less stable source than Freq.).
After some days, SyncE is back. Then after some minutes (10 minutes or more) the
DTS time handler estimated SyncE as the best source of all three and switches back to
SyncE.
As a last scenario consider the scenario above, but:
-
Time source change mode is set to manual.
In manual source change mode the statistical analyzation does not make any source
rating. Only the priority list made by the user decides which source will be next on a
failure.
On a SyncE failure DTS will now switch to priority 2 source, PTP. Freq., as priority 3
source, will be taken if SyncE and PTP fail.
8.6 Time server
•
NTP v4 (compatible with v3, RFC 1305) as per RFC 5905 (port 123)
•
SNTP (UDP), RFC 4330 (port 123)
•
PTP (UDP), IEEE 1588-2008 (V2) (ports 319 and 320)
•
TIME (TCP/UDP), RFC 868 (port 37)
•
DAYTIME (TCP/UDP), RFC 867 (port 13)
8.7 Time accuracy, time-keeping
See appendix H Technical data.