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.

https://timemachinescorp.com/product/gps-time-server-tm1000a

 -mel beckman

On Dec 30, 2018, at 6:40 AM, Shawn L via NANOG <nanog@nanog.org> wrote:

Speaking of GPS-enabled NTP appliances, etc. wondering what hardware people are using for this.

 

thanks

 


-----Original Message-----
From: "Raymond Burkholder" <ray@oneunified.net>
Sent: Saturday, December 29, 2018 12:01pm
To: "Matthew Huff" <mhuff@ox.com>, "list@satchell.net" <list@satchell.net>, "nanog@nanog.org" <nanog@nanog.org>
Subject: Re: CenturyLink

On 2018-12-29 7:51 a.m., Matthew Huff wrote:
> 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.
>
On one occasion, due to bad firmware or a configuration issue, I have
seen GPS stratum 1 diverge from NTP.  It was somewhat eye brow raising
to the company.  My NTP monitored servers were shown to be diverging
their GPS/NTP, but after looking at twice or thrice, it was the other
way around.