topic Re: GPS time receiver and HPUX 10.20? in Operating System - HP-UX

GPS time receiver and HPUX 10.20?

Robin Abecasis — Wed, 28 Apr 2004 11:25:14 GMT

Hi,

I have a small closed network of 5 HPUX 10.20 servers, with no access to our corporate network/time servers.

My only choice is a) once a month update the time on the master server which is a time server to the other 4 clients, or b) connect via serial to the company GPS time receiver.

Is option B) possible? Its a "TruTime 800 Series TCU".

Cheers,
Robin

Re: GPS time receiver and HPUX 10.20?

Steven E. Protter — Wed, 28 Apr 2004 11:37:18 GMT

B is possible, but I'm not sure about your specific device.

If the device supports HP-UX 10.20 then it will work. If not, no.

Option C: If any of the boxes has a modem, you can have a script dial the internet and get the time.

SEP

Re: GPS time receiver and HPUX 10.20?

A. Clay Stephenson — Wed, 28 Apr 2004 12:02:32 GMT

There should be a file /etc/ntp.conf.example; One of the devices listed is a TrueTime GPS (driver #15) so you may be okay.

If your master has access to the Internet then there are many time sources available.

Re: GPS time receiver and HPUX 10.20?

Robin Abecasis — Wed, 28 Apr 2004 16:48:00 GMT

Bah, never noticed that entry in the ntp.conf.examples. Many thanks... our comms guys will cable the server to the GPS receiver and i will try it...

Thanks,
Robin

Re: GPS time receiver and HPUX 10.20?

Angus Crome — Fri, 30 Apr 2004 00:33:05 GMT

I don't know about the 800 Series, but we had a an old 600 series back in 1999 and it would not work. The time signal coming out was not compatible with ntp4, ntp3 or xntpd (however, it made an impressive clock on the wall). There was a lot of information on the TruTime website at the time, but it required a lot of programming, and some advanced mathematics knowledge as well (I think Clay could have handled that with extremely little effort). There are a number of devices out there from TruTime and others that are relatively cheap now, and would support the (I believe it was NIST?) standards.
You can always check the ntp website at the University of Delaware, oops, looks like it has been moved. Now you can go to www.ntp.org to get information, configuration, source and pre-compiles.