Bugzilla from john@jcoppens.com wrote:
> 
> my ADSL is failing, and
> the phone techs can't seem to locate the fault - or they don't want to).
> 

If the telephone on that line is working good (clean, loud, no crackles or
noise), then the line should usually be OK for ASDL as well. In North
America, there's usually a phone jack right on the terminating device where
the phone line enters the house. This is called the demarcation point. If
the phone tech can disconnect your house wiring and get a proper signal at
the demarcation point, then the fault is in the house - a bad phone or a
wiring fault, and it's usually fixed at your expense. You should try putting
your DSL modem right at this entrance point, disconnect the rest of the
house phone wiring if you can, and see if the ADSL works there.

In about 6 years, the only time my ADSL failed, the phone line was still
clean and good. It took me a week to reach someone smart enough to check the
ADSL modems at the CO, where they found that one side of the connection to
their DSL modem had opened up.

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