Help testing phone land line.

[Dave Lehnert]

Been having trouble with my land line off and on.
DSL works as it should. I can still make calls and receive calls but at times there is a loud humming sound to the point you can just barely hear the other person.

Am I correct if I disconnect the little gray phone line in the box (photo below) and plug in a telephone. If I still hear the humming the problem is not in the house ?


Phone box 2.jpg