Fred McKenzie wrote:

In article
,
klem kedidelhopper wrote:

My question is if the problem is in the premises wiring what could be
the most likely cause of something like this?

Klem-

There should be a modular phone connector in the box where your phone
line attaches to the house. You can isolate a problem to being inside
or outside, by connecting your equipment to the outside jack, and seeing
if the problem goes away.

Well, not always. We have corrosion IN the demarcation box, and that
RJ11 needs to be replaced every couple years. This is St. Louis, MO.,
humid, but not insanely so. You can tell because the whole connector
turns black, both the jack and most especially the plug on the
pigtail, where it is really obvious because it is supposed to be
clear plastic.

Jon