Dave Howorth wrote: > On Sat, 2007-03-17 at 18:06 +0100, Roger Oberholtzer wrote: > >> GPS alone is never going to cut it. >> > > I remember I was impressed a long time ago, when I did some work with > the BBC, because the clock signal they had coming out of the wall in > every room came from their atomic clock. > > Years later in a telecom switchroom I was shown five clocks. The first > four were GPS clocks. Only if all of those failed did they refer to the > atomic clock. So I guess they agreed with you! And they had the > advantage of being in a fixed location :) > >
I also used to work for a major telecom company. In the network management center there was a digital clock that I had noticed was off a bit. The guy working there said it couldn't be, because it was controlled by the network time base (derived from WWVB), which was correct. However, what he didn't realize was that while it had a very accurate time base, it was manually set according to someone's watch and was therefore continually wrong by precisely the same amount. These days, when setting clocks on network and telecom equipment and NTP is not available, I set according to my cell phone time, which is quite accurate. At home, I use the NTP controlled clock on my computer. BTW, should anyone want the correct time, it can be found here: http://www.time.gov -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
