Ethernet module coil whine

Hi, yesterday i started to notice a strange whine from my fw16, initially i couldnt figure out from where it comes but when i disconected the ethernet cable and made a http request the whine became continuous. After that it started to whine every time when i made a http request.
Has anyone else noticed this whine from the ethernet module?

Strange. I’ve got an ethernet module and didn’t hear any whine from it when I was using it.