Hello,

I experienced the same issue as the OP. Can anyone shed any light on this please?

I've contacted a few guys in the security industry where i am at, and it looks like that the POE injector is the problem, it resets the device when even a very tiny mains power instability occurs. It can't be solved by UPS either, only by using better quality POE injectors, which is a shame. It applies to TP-link, and even the U... devices. And the biggest shame is, there is no official confirmation that it's the problem, as You can see, not even a single answer from TP-link.

I will give it a go, thanks for the heads up!

My CPE210 just reset itself here too. Any suggestions would be appreciated.

Hi all

As far as I know, if your CPE keep reset itself, there may be the following reason:


1. Your CPE was not grounded well.
In some area, because of the whether , the geographic environment or the electromagnetic interference, CPE may suffer some current shock.
This current shock would trigger the hardware reset of the CPE. Even more, cause damage to the CPE.
So please make sure that your CPE have been grounded well.


2. When you power the CPE with non provided PoE injector, because other injector's current parameter doesn't meet our CPE,
it will also cause auto reset. So it is recommended to use the provided PoE injector.


3.If the distance between injector and CPE is too long, the CPE will work abnormally.
Maybe reset itself, because the current is unstable when the ethernet cable is too long.


4.If the quality of your Ethernet cable is bad, and influence the current transmission, it will also cause reset problem

1. Grounding is sorted well, it does not matter.
2. The problem happens with original, and with better quality/higher amp rated injectors too.
3. Distance is 2m-15m, it shouldn't cause problem even at 24V POE.
4. Cat5e 24AWG solid copper should be good enough, but i've tried with 23AWG Solid copper Cat6 too, problem not solved.

What i found, is that the hw rev. 1 almost never does it, v2 almost all does. Never tried a v3, and now i've sent back all items to the distributor.
I've put too many work hours into a toy, because it is not a professional hardware.

Edison_TP-Link wrote

Hi all

As far as I know, if your CPE keep reset itself, there may be the following reason:


1. Your CPE was not grounded well.
In some area, because of the whether , the geographic environment or the electromagnetic interference, CPE may suffer some current shock.
This current shock would trigger the hardware reset of the CPE. Even more, cause damage to the CPE.
So please make sure that your CPE have been grounded well.


2. When you power the CPE with non provided PoE injector, because other injector's current parameter doesn't meet our CPE,
it will also cause auto reset. So it is recommended to use the provided PoE injector.


3.If the distance between injector and CPE is too long, the CPE will work abnormally.
Maybe reset itself, because the current is unstable when the ethernet cable is too long.


4.If the quality of your Ethernet cable is bad, and influence the current transmission, it will also cause reset problem

I wish I could back in time. Bought two CPE210 v2 to connect my companies and every 2 days one of them is reseted.I bought a Furukawa shielded CAT6 with industrial shielded RJ45 and made everything works like a charm in the first day. The cable has 15 meters in both companies.So, If you googled this and come up to this thread, please do NOT buy these toys, like freeone told.

Unfortunately, I can confirm this with several CPE510
The problem seems to be that besides providing PoE, the device uses one "free" pin of the 8 ethernet lines (4 are used for Fast Ethernet, 2 for PoE) as remote reset line. It seems to be that this line is "open" (not pulled down or up by resistors) so that any floating potential will find its way into the device that thinks is asked to reboot.

Poor engineering I would say.

If ever, the remote reset would work only if the reset signal is there for 10 seconds without interruption.The only thing that might help is to use a RJ45 to RJ45 plug just before the CPE device that interrupts the line being used for remote reset - sorry I don't know which pin that is.

Then, people are saying that the device needs proper grounding. Actually, one should only ground devices ONCE ever. The best way to ground such a device is with something like the ALLNET 95100 at the border between exterior and interior of a building.In case you ground it at TWO spots (on the roof and at the aforementioned border) you are creating a induction loop - a lightning will surely induce great currents in that loop.

Terrible formatting in this form, BTW. You have to insert HTML line breaks for yourself but they are erased when editing. Is TP-Link even a company?