In the past few months I've noticed problems on multiple US-based public NTP stratum 1 servers that use CDMA as their stratum 0 clock.. EndRun Technologies Tempus LX ( https://endruntechnologies.com/pdf/USM3014-0000-000.pdf) is an example.
This is not a surprise. In the US Verizon has announced plans to shut down its legacy CDMA service though the end-date keeps changing ( https://usatcorp.com/verizon-extends-cdma-network-date/). As the number of CDMA channels and base stations drops the NTP servers have difficulty finding an acceptable signal. Failure modes include: rapidly increasing root dispersion, reported time drifting over the course of many weeks, 1024-week rollover(!), and complete failure. I don't know how users will adapt. Other radio-based technologies have poorer in-building coverage. Steve Sommars _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
