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<span style="background-color: rgba(255, 255, 255, 0);">We have had great success with the TimeMachines TM1001A. Simple, robust, and over several years we’ve had zero outages on more than 40 installations. And unlike most of the competition, not ridiculously
overpriced.</span>
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<div><a href="https://timemachinescorp.com/product/gps-time-server-tm1000a/?_vsrefdom=adwords&gclid=CjwKCAiA9qHhBRB2EiwA7poaeP6WdNN-kfhXHj9agAvZwm5PKZf70nCzxPH5Wgm__2S6164H86uSwxoCmQgQAvD_BwE" style="caret-color: rgb(0, 0, 0); background-color: rgba(255, 255, 255, 0);"><font color="#000000">https://timemachinescorp.com/product/gps-time-server-tm1000a</font></a><br>
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<div id="AppleMailSignature" dir="ltr"> -mel beckman</div>
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On Dec 30, 2018, at 6:40 AM, Shawn L via NANOG <<a href="mailto:nanog@nanog.org">nanog@nanog.org</a>> wrote:<br>
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Speaking of GPS-enabled NTP appliances, etc. wondering what hardware people are using for this.</p>
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thanks</p>
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-----Original Message-----<br>
From: "Raymond Burkholder" <<a href="mailto:ray@oneunified.net">ray@oneunified.net</a>><br>
Sent: Saturday, December 29, 2018 12:01pm<br>
To: "Matthew Huff" <<a href="mailto:mhuff@ox.com">mhuff@ox.com</a>>, "<a href="mailto:list@satchell.net">list@satchell.net</a>" <<a href="mailto:list@satchell.net">list@satchell.net</a>>, "<a href="mailto:nanog@nanog.org">nanog@nanog.org</a>" <<a href="mailto:nanog@nanog.org">nanog@nanog.org</a>><br>
Subject: Re: CenturyLink<br>
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On 2018-12-29 7:51 a.m., Matthew Huff wrote:<br>
> We have two stratum-1 servers synced with GPS and a PTP feed from a provider that also provides PTP to market data systems, but we still have to monitor drift between system time and NIST time. Don't ask for the logic behind it, it's a regulation, not a technical
requirement.<br>
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On one occasion, due to bad firmware or a configuration issue, I have <br>
seen GPS stratum 1 diverge from NTP. It was somewhat eye brow raising <br>
to the company. My NTP monitored servers were shown to be diverging <br>
their GPS/NTP, but after looking at twice or thrice, it was the other <br>
way around.<br>
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