); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: "Jared Morrisen" <[EMAIL PROTECTED]> Subject: [time-nuts] Basic Stratum 1 question Date: Thu, 2 Aug 2007 11:32:06 -0400
> ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Hi, > > I am having a debate with our CIO. He wrote in a memo about timing: > > *Local hardware is to be considered Stratum 1, since it get time from its > own CMOS.* > > > > I told him that absurd and that it can't be considered stratum 1. > > > > Please clarify. Stratum 1, in the ntp world, is a source that's connected to an official source of time (the so-called Stratum 0). The CMOS clock isn't connected to NIST, therefore it can't be considered Stratum 1 by any stretch of the imagination. Also, Stratum 1, in telco, has certain performance requirements. These timing requirements are relatively stringent. Even using an insanely generous specification of 1ms and 1ppm, an unsciplined PC clock cannot meet that spec for more than a few seconds given that the typical frequency error is on the order of ~100ppm. In short, your CIO is mistaken[*]. Warner [*] Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
