Pretty much any industrial Ethernet vendor makes switches that support 1588 - we were using ones from Siemens.
On Wed, Jul 31, 2013 at 1:29 PM, Scott McGrath <scmcgr...@gmail.com> wrote: > The only switch I know that supports IEEE 1588 is the Cisco CGS 2520 and > it was about 10 k before discount. It's intended for use in smart grid > applications > > NICs are about 500 each from a variety of vendors. Altera makes most of > the silicon > > Sent from my iPhone > > On Jul 31, 2013, at 12:19 AM, "Bill Hawkins" <b...@iaxs.net> wrote: > > > Group, > > > > Has anyone used IEEE 1588 to synchronize clocks on an Ethernet network? > > > > I was involved in the design of time sync for Foundation Fieldbus circa > > 2000. > > We needed one millisecond accuracy, so we went with SNTP on local > > networks. > > I've just seen an ad for a switch that can do 1588, and looked up what > > it does. > > > > Microsecond accuracy is impressive, but what does it cost? > > > > Industrial sensors are generally sampled at about 10 millisecond > > intervals out > > to several seconds. SNTP would appear to be very adequate for time > > stamps as > > there is uncertainty introduced by when the computer gets around to > > sampling > > the sensor in its sampling and control cycle. > > > > Any thoughts appreciated. > > > > Bill Hawkins > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
