ethernet port problems

i have a site where i am having problem with ethernet ports of the AP. the ethernet port goes bad every 1-2 months.
i dunno if it is due to electricity or due to lightning. but the radio recieving bandwidth works absolutely good with no problems. only the AP is affected everytime.
i have changed the cables and power adapters & ups but the problem continues.
is it something to do with the 15 dbi omni antenna i am using at only this site. is it the cause?
all my other sites have sectors and i hae never faced this kind of persistent problem at ne loc.

Hi,

Do u have Lightining arrestor installed on Tower and Tower earthing available. Do wifi cards have ESD protection, are u using Surge protection on Ethernet ? are you using Metal enclosure ?

no lightning arrestor. no esd protection.
yes towers r grounded but i dont understand why only the AP ethernet goes bad. why not other radio.

Which RB ? are you using the same RB as AP on the same tower for other Link…

I’ve found nice RJ45 connectors with metal shield. They are cheaper and better than TC.
http://www.kabeltechnika.pl/dat/kabeltechnika/1748-sposob_montazu.pdf

I have had the same problem for years with various types of equipment. I started isolating my equipment from the tower with rubber or enclosures that are not made of metal. I have also discovered that grounding my equipment to the tower is not a good idea. With the towers I am on, I have to run my own power up the tower and I ground my equipment to the ground leg I ran up the tower. I also use shielded outdoor cable from the Poe the radio and ground the shield to my power ground I ran up the tower. Basically I try to totally isolate my equipment from the tower. I used to replace radio’s every 2-5 months until I figured this out. On my main tower I have 6 radio’s at 650ft and I have not lost any of them in the last year. (KNOCK ON WOOD!) I was replacing about 6-10 a year and sometimes a lot more. I think static is knocking out the lan ports and not power surges, but I am no expert.