R1D2 wrote

Latest version for CPE510 is v2.1.12 of 2018-03-07, which includes the fixes in the beta version. But support sites are not always up-to-date, so you can download v2.1.12 from the WBS510 page: https://static.tp-link.com/2018/201803/20180307/WBS510(UN)_v2.0_20180202.zipHowever, you have to try wether CPE510v2 accepts it - I installed this firmware on all my Pharos devices (CPE210v1, CPE510v1.2, WBS201 and WBS510). Only CPE210v2/v3 uses a different image. Also EU and US versions of the firmware are the same, albeit different setting ranges will be enabled on EU devices vs. US devices.

hi tplink_cpe510_

read my post here

https://community.tp-link.com/en/business/forum/topic/109402?replyId=300459

I'm sure that has to be your problem simply change the POE cable for a good CAT 7 cable

or use a short CAT 5 or 6 cable and lower the unit power

then after you lower the power you can change the short cable for a long one and the unit won't restart anymore

or simply just connect the good cat 7 cable from the beginning and you don't have to lower the unit power or use a short cable

I have 4 wbs units, two wbs 210 and 2 wbs 510 and all four of them do the same thing

right now I just finished installing the firmware from CPE610 thanks to a post from R1D2 and all my units are working perfectly fine.

if the cable is not a premium cable

then you have to use a short cable like 10 ft or less on the power adapter POE connector port

if you need to use a long cable in the POE connector

it has to be a good cable something like cat 7

to use a long cat 5 in the power adapter POE conector you have to lower the unit power first 

technically speaking get the best cat 7 cable you can find or you can afford

don't use a cheap cable or an old cat cable

The funny part is this

If you use the same cable that has the problem connecting the POE from the power adapter to the POE conector in the unit

and you use that same cable in the lan port

then you will notice that the cable will connect without any problem

that’s why I’m sure that the problem is cause by the "voltage" or the electrical power in the POE port

between the power adapter and the wbs unit

it seems like the cheap cable can't handle too much power

to close this up

you can use a cheap cat 5 cable in the power adapter lan port

but you can't use a cheap long cat 5 cable in the POE port

unless you lower the dbi first

good luck

just I case not all cables are all the same

There re different brands, lengths and category

a cat 5 patch or cat 5e might work depending on the cable length and cable quality

but to be sure I rather go with the best

being cat 7 and not just any cheap cat 7

but a good cat 7 to avoid any problem

I ran a test and converted a premium cat 7 cable to a cat 5 cable

and guess what

I had the reboot loop

So that made think that the problem is just the category and not really the cable brand or quality