[time-nuts] Re: dial-up time source for NTP

[Bob kb8tq]

Hi

At least in the US, there are an unfortunately large number of 
providers / cell sites that are not very diligent about thinks like 
embedded timestamps…..

Since you can get time from a < $10 GPS usb “dongle”, and
do so with fairly normal drivers, that would seem to be the 
quick / easy backup plan.

Bob

> On Aug 10, 2022, at 5:06 AM, Jürgen Appel via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Dear Discussion of precise time and frequency measurement,
> 
> On Tuesday, 9 August 2022 21:52:45 CEST Avro125 via time-nuts wrote:
> 
>> I’m wondering if someone would be willing to assist me in getting NTP to
>> reference time from NIST (Colorado) or NRC (Ottawa) via a dial-up modem.
>> Either as a primary source, or as a failover in case the GNSS signal is
>> lost.
> 
> Sorry, I don't have experience with NTP and dialup-connections, but depending 
> on how trustworthy your mobile phone provider is and what your requirements 
> are, getting the timestamp directly from the GSM network (NITZ) might be an 
> alternative  option, even without incurring data charges.
> 
> (see e.g. https://coders-home.de/en/sync-time-on-linux-via-gsm-1065.html)
> 
> Cheers,
> 	Jürgen
> 
> 
> -- 
> Jürgen Appel
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