On Nov 27, 2:03 pm, "Mamba" wrote:

Hard to imagine tho. I beleive a DSL filter goes on each voice phone line,
meaning each one would need to be faulty?

Not necessarily. Some of the material I googled indicated that a DSL
installation might involve a splitter, right at the phone line
entrance to the premises. One line in, two lines out. One of the two
lines goes to the DSL modem only. The other line goes to all the voice
telephone jacks. In this case, 1 filter would suffice for all the
voice jacks.

Jerry