The Stratum numbers in the Telecom Sync industry and those used in NTP hierarchy are different beasts. In Telecom Sync, Stratum 1, 2, 3 et al are internationally defined levels of frequency accuracy. In NTP Stratum 1 merely means the top of the hierarchical pyramid with Stratum 2, 3 etc below it. Stratum 0 has been used in discussions I have seen from people at Datum and TrueTime to represent a GPS/NTP reference, but realistically I believe that it should be labelled as Stratum 1.
Would humbly suggest you take a look at www.ntp.org for more information. Rob Kimberley -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray Sent: 14 January 2006 18:35 To: [EMAIL PROTECTED]; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] NTP stratum 0 > I would like to know where could I find the FORMAL specification of > the NTP stratum 0. I assume you are looking for some sort of quality requirements like the telephone industry has for their various stratum levels. I don't think you will find it. Basically, stratum 0 is anything from outside NTP. The "0" doesn't promise any quality. There is a mechanism within ntpd for the driver to report a quality estimate. -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
