Re: Recommendation on NTP appliances/devices

[bmanning () vacation karoshi com]

 Loves my old Heathkit WWVB unit.   Keeps drift in check most days.
 Pairs nicely with the Spectracom 9383.   

 Looking at the Microsemi TP-5000 w/ rubidium oscillator.

/bill

On Thu, Apr 03, 2014 at 10:25:07PM -0400, Rob Seastrom wrote:
> On a tangential note, it's all very nice to say "We have brand X and
> like them", but I'd be curious to hear from folks who have deployed at
> least four divergent brands with non-overlapping GPS chip sets and
> software [*] to keep a conspiracy of errors from causing the time to
> suddenly be massively incorrect.  Not that this has ever happened in
> the past in a single vendor configuration [cough].
>
> Along the same lines I'm troubled by the lack of divergent sources
> these days - everything seems slaved to GPS either directly or
> indirectly (might be nice to have stuff out there that got its time
> exclusively via Galileo or Glonass).  The sole exception that I can
> think of offhand is that I have an office within ground wave of WWVB,
> which would be a tasty ingredient.  GOES is gone.  LORAN is defunded.
> And so it goes; all our eggs are in one basket.
>
> I've thought about posting this request to the NTP developers list,
> but maybe someone who's an operator and actually cares about keeping
> the byzantine generals sequestered from each other has solved this
> problem recently.
>
> Clues?
>
> -r
>
>
> [*] to the extent possible; I'm sure that there's a lot of reference
> implementation DNA floating around out there)
>
>
> Berry Mobley <berry () gadsdenst org> writes:
>
> > We have symmetricom (now microsemi) and are very happy with them, but we use the roof mounted gps antennas. They 
> > will peer with public ntp severs if that would work for you. 
> >
> > David Hubbard <dhubbard () dino hostasaurus com> wrote:
> >
> > > Anyone have recommendations on NTP appliances; i.e. make, model, gps vs
> > > cell, etc.?  Roof/outdoor/window access not available.  Would ideally
> > > need to be able to handle bursts of up to a few thousand simultaneous
> > > queries.  Needs IPv6 support.
> > >
> > > Thanks!