I got one for ya a 50 pr underground cable feeding one building to another aprox 200ft.
been installed 5 yrs sending a panasonic display phone and 3 single line phones. on panasonic phone here a loud buzz / hum . changed pairs same thing . on butt set monitor pairs some pairs have a loud buzz some faint buzz you can hear it and there is a lot of noise comming from my amp wand , any one got any ideas what is wrong. efi or rfi are there filters to take off this noise?


Danny