[EMAIL PROTECTED] wrote: > On Wed, 3 Oct 2007, Patrick Domack wrote: > > >> I would love to make my 3 servers stratum 1, but as they are in a >> datacenter with no way for a gps to work, and the walls are even too >> thick for cdma. That would leave the colorado time radio, but well, >> same as cdma, won't work. Then there is phone dialup, if only I could >> get a phone line in there, I gave up on that idea after waiting a >> year, but never had that big of a deal not having dialup in there. >> >> > > How accurate is getting time through phone dialups ? > > I have always though I would get more accurate time by connecting through > the net to get time but I never looked into it. > > I had dial up configured as a backup to one of my boxes - there are two main issues - first the basic accuracy is only a couple of ms and second unless you call often the holdover time of a typical PC clock is just not good enough to stay accurate. If you upgrade the host to an ovenized crystal things get better but it's still not as good a finding a local stratum two clock.
I'm not sure the whole GPS diversity argument holds water. There really is no good alternative that provides the accuracy that GPS offers (CDMA is GPS and the clock solution don't offer the same accuracy do to propagation delays). I'm open to somebody convincing me that there is a good alternative to GPS but I've not yet heard a compelling argument. Are there timing receivers that use the other sat-nav systems - Russian (does it still work?) and European (is it working yet?) John _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
