recently we changed out an FPE panel.When we tied the #10 ground from the phone company block in the basement ceiling to our grounding electrode system the customer said all the phone lines were staticy.Even though we are required to bond all systems,I diconnected phone ground and just put a wire nut on it.I'm not sure what caused this problem,but I know I can't leave it this way.There is no other grounding electrode (small ground rod) installed on phone system.#10 is coming off screw with yellow wires on phone block.help will be appreciated.Thanks.