Though I don't have a Time Machines NTP server I've monitored them for several years and have seen a number of "off by N-seconds" errors. The manufacturer reproduced the problem and released new firmware for the TM2000B. I don't know the status of other models. I would be hesitant to trust the server when the GPS signal is marginal.
I have a local LeoNTP server. Though it uses a different chipset than the Time Machines TMxxxx, it also exhibits off by N-seconds. I've seen similar errors for several other public LeoNTP servers, including some of the ntpX.leontp.com servers. When I degrade the GPS signal the N-second errors become more frequent. A typical NTP server will indicate potential loss of accuracy by setting the alarm bit or increasing root dispersion. The LeoNTP does neither, instead it decreases the NTP "precision" field. [The value itself is bogus.] The machine's physical design is nice, the performance is excellent. I wish the timestamps were more trustworthy. Steve Sommars On Thu, Apr 21, 2022 at 8:20 PM Paul Watts <rpwa...@gmail.com> wrote: > Thanks for the reply, Forrest. > > I do have a TM1000(model number?) but I thought they were out of stock. > Their website currently claims otherwise and I'll probably get another. > > I do have systems at each site running NTP against my local LeoNTP devices > and the US NTP pool. > > I just like to have a local source as well as remote. > > Recently, I learned about the Centerlclick NTP250. Anyone have any > experience? > > On Thu, Apr 21, 2022 at 12:09 Forrest Christian (List Account) < > li...@packetflux.com> wrote: > > > Time machines makes a similar box. > > > > However, one would expect that with that many devices at a site one could > > find a couple of devices which could run a ntp server along with their > > normal workload. > > > > On Thu, Apr 21, 2022, 2:23 AM Paul Watts <rpwa...@gmail.com> wrote: > > > > > Long time lurker, first time poster. > > > > > > In the past, I've purchased the LeoNTP server to act as a local time > > server > > > on my work network. Unfortunately, those NTP servers aren't available > to > > > order. > > > > > > I'm in need of two - three more NTP servers for various locations. > > > > > > Do any of you have an alternate NTP server recommendation? > > > > > > 1. I'd like to keep the price less than $1,000. The Leo's were a great, > > > self contained choice at less than $400. > > > 2. Support for IPv4 is required and IPv6 is desired. The main > > shortcoming I > > > have with the Leo's is no support for IPv6. > > > 3. I'll serve about 150 clients per site from a given NTP server. My > NTP > > > clients are a combination of Windows and Linux computers along with > > various > > > types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's > don't > > > even breathe hard at that level. > > > 4. No PTP support is required. My timing needs are IT related - log > > > consistency, security protocol requirements, etc. > > > 4. I'm not interested in building and using something like a Raspberry > > Pi. > > > I'll be sending these to remote sites and don't want to worry about > > issues > > > like memory card failures and the hobbyist feel of many Pi cases and > > > cooling options. That's fine for my home but not for work. > > > 5. Availability is important. > > > > > > Any suggestions are welcome. > > > > > > Thanks, > > > > > > Paul Watts. > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > > send > > > an email to time-nuts-le...@lists.febo.com > > > To unsubscribe, go to and follow the instructions there. > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > > an email to time-nuts-le...@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > > > -- > Paul Watts. > rpwa...@gmail.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.