TimeMachines Precision Digital PoE Clock, 2.5“ x 4 Red Digits, Black Case

If you want accurate time this is the clock for you. Its POE connection means the time show is always accurate and easy to read at a distance. The web interface is easy to navigate and set up.

I will put aside the elegant simplicity, predictability and reliability of Ethernet powered network clocks, because the concept speaks for itself. Instead will share our experience on how this clock is different than the others we have tried. Our company now has four of these clocks. We have owned several brands of Power over Ethernet (PoE) network clocks over the years. This one is easily our favorite. It also happens to be about $100 cheaper than the one it replaces (at the time of this writing).This product is of the ideal design in my (informed) opinion. You can simply plug it in, accepting the time server defaults, or you can easily configure your preferred time server and GMT offset using any web browser (via the clock's embedded web server), BUT if your network DHCP server is configurable (typical of any mid-size business or school), the clocks will self-configure according to the DHCP time server options you specify.THE OTHER BRAND of network clock that we have on premises (starts with the letter V) has a needlessly complex provisioning and setup application. That system was much harder for us to set up. In our case it took more than an hour for a networking expert to 1. discover that a configuration utility was required, 2. download it, 3. comprehend it, 4. configure it, 5. test the setup. That's expensive! Furthermore, we sometimes observed drift of a whole second or to from our intranet time server (OpenNTP). This may have been idiosyncratic, but it is still worth mentioning.BY CONTRAST this "Time Machines" clock seems to remain precisely synchronized (so far). The clock itself is 3 hops from NIST Stratum-0, and yet it appears to stay within .02 seconds (as close as we can measure) of Universal Coordinated Time. That is good enough for us, and certainly more than good enough for anything with a pulse.