Re: Amusing implications

2019-02-05 Thread Eric S. Raymond via devel
Achim Gratz via devel : > Matthew Selsky via devel writes: > > See https://www.ntpsec.org/drivers.html > > > > INACCURATE > > Remove GPS drivers and time radios for which the hardware offers no > > better source accuracy than a timing GPS available for less than $75 > > in 2015; that is, about 5µs.

Re: Amusing implications

2019-02-05 Thread Achim Gratz via devel
Matthew Selsky via devel writes: > See https://www.ntpsec.org/drivers.html > > INACCURATE > Remove GPS drivers and time radios for which the hardware offers no > better source accuracy than a timing GPS available for less than $75 > in 2015; that is, about 5µs. (However, do not necessarily remove >

Re: Amusing implications

2019-02-04 Thread Richard Laager via devel
On 2/4/19 7:34 PM, Hal Murray via devel wrote: > if they get converted to VoIP with typical who-knows > type routing. Very often, yes, but not always. BTW, the example mentioned for the modem was ACTS + lockclock. I think that's how NIST (at least used to) build out additional time server instal

Re: Amusing implications

2019-02-04 Thread Matthew Selsky via devel
On Mon, Feb 04, 2019 at 05:34:56PM -0800, Hal Murray wrote: > > Now, if it doesn't meet our accuracy thresholds, that's another story. > > Do we have any accuracy standards? See https://www.ntpsec.org/drivers.html INACCURATE Remove GPS drivers and time radios for which the hardware offers no bet

Re: Amusing implications

2019-02-04 Thread Hal Murray via devel
> Now, if it doesn't meet our accuracy thresholds, that's another story. Do we have any accuracy standards? Given the screwups that can happen with bufferbloat, I'll bet it works much better than some network connections. It would be interesting to measure the delays on dial up lines. I wonder

Re: Amusing implications

2019-02-04 Thread Matthew Selsky via devel
On Mon, Feb 04, 2019 at 01:39:48PM -0500, Eric S. Raymond via devel wrote: > I found a documentation error. > > The page for the modem driver says: > > This driver requires a 9600 bps modem with a Hayes-compatible command > set and control over the modem data terminal ready (DTR) control

Amusing implications

2019-02-04 Thread Eric S. Raymond via devel
I found a documentation error. The page for the modem driver says: This driver requires a 9600 bps modem with a Hayes-compatible command set and control over the modem data terminal ready (DTR) control line. The actual line speed ranges from 1200 bps with USNO to 14,400 bps with N