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Hello, I'm looking forward to help a local refclock owner (cesium std and GPS receiver) setting up an NTP server. They're Symmetricom users. They have a CS-III cesium standard, which is queryable via RS232, but I wonder if I'll be able to use it from a NTP-enabled Linux box. I've read about the PPS clock discipline driver, and I know I'll probably need to build some cables around. And I'll also need a refclock. Moving forward, their XLi GPS receiver has an Ethernet port, but I still have to check if NTP support is enabled (seems like a commercial option) but it seems so since they provided me with addressing information. Is there any other option for it? http://bit.ly/blZVVf Finally, they have a time display which connects via BNC, I assume to the GPS and maybe also the cesium std. So, I'd really appreciate your advice on: (a) Should I ditch the cesium clock and go ahead and just do the networking to get the GPS receiver with NTP support out to the Internet? (b) Should I setup an additional Linux server with NTP and use the serial connection to take profit of the cesium clock? Maybe also peer this server with the NTP server on the GPS receiver? (c) I'm not 100% certain ATM but this clocks might be setup to serve a local timezone, and not UTC. And I'm not aware if ntp.conf allows me to say: hey, please don't try to convert this. I believe they are not UTC since they're connected to a talking clock, which I don't think has the ability to timezone UTC signals¹ I'd also like to clarify that I need to check and measure connectivity out there before thinking of adding this to the pool, but initially they will grant me permission since I already convinced them that getting out of their cesium-powered rooms is a good thing for everyone. Thank you very much for your tips and I hope to hear back soon, Jose ¹ When Venezuela switched from UTC-0400 to UTC-0430, there was a public TV broadcast where the refclock manager just adjusted it by hand, but then again I don't think that was the standard but maybe just the clock that it's been displayed. He then adjusts the talking clock: http://bit.ly/b3kvIi -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBCAAGBQJLaI7FAAoJEMAyQqmI1Lff05AQALfvmRH6FebBSWzFrgZjU89b 4m3g17Rle0upmJMC6O4tKGLXN+tIz9qrMyPtmi0DpC/IfoXhgBkeUWD5niAAx1P2 y0Nw2H6XP5S291e631l9Rk3mMlxGEzv5mQPe8L2/AxUaqbCF+IS/qU2xJNC39yRh 87G1K64SRCyyWekErvEQfTOro5wiq8w4vt+bu9LI4kaUKwJQocLqW7fnKffpzwZ0 FgrCx6YJK0pW99qpKSBwvwZZ06oZ2ayl28sFXpGbQHbYqdqq4F3r1YhYoRE5WGP/ 0eLESQKLnTSqk9JRURhhMfknTe/TuDSuoz9D7ZNMp5RxduLqUOGuf3v5S15L6AH/ HPX+MMYdAnRiyrRwWXkac96fSAVNtVF137xWjbCBzMsjtU2SpITh0LUeX2VJH9Y6 jGNE09W3XcsYzUf54bmi0pnSmjAS00d661/dQ+SPVFFzKQBegOECx42e+/ZwE8oF 0lHPfr6RInRxnLetZac1LxQBN6xvdnj1N8M9W1ghQXwwxy+cCjWnLL2V8vqX144K ovM1tojTw+U6qJg8v0SRjj2bYhVfVYTHubdt3iNsFnRDiBiLpQdFMHmk+F/lN+IP zD4Js2gusJy34FFMU13ZojEuCOm6mfAfXM/JQFV+50VdHhRJ1bR/D8Lg2aYEhq6s hPXBAAoQ3qw01IQO4J6V =6Icr -----END PGP SIGNATURE----- _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
