I have a USR 5637 connected to a Linux host using a VoIP line. I can
manually dial and often* successfully connect to the NIST/USNO numbers.
When used as a server it typically manages two (at random) successful
connections over 8 polls. All other connection attempts fail including all
other calls
Anyone wanting to check whether they are being fed spurious leap-second
information may like to try my Leap Trace program, available as a
Windows GUI and command-line program, and as a Perl script for other OS.
http://www.satsignal.eu/software/net.htm#NTPLeapTrace
--
Cheers,
David
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