....

==== Just for grins, when you checked it at the "demarc",
did
you make sure you had YOUR house wiring disconnected? To be
certain, always disconnect the house wiring from the demarc
before testing.

ok i did not know that.


....
That's a very important part of the picture. If you've
accidentally caused a short somewhere, and you do not disconnect
the house, then that short will still be there when you test at
the demarc. By disconnecting the house, you remove the short and
your dialtone may well return after a short pause.
Note that a short sets off an "alarm" in the central office,
which in turn disables dialtone to your phone line, followed a
few minutes later by removal of the battery voltage. That way a
storm problem or car accident doesn't knock out the whole central
office due to many shorts.
If you did have a short: when you disconnect the house to
test at the demarc, it may be several seconds before the telco
automatically restores battery voltage and dialtone to your phone
line. It -will- come back though; it will not stay gone. So,
give it a minute or so to return if it's not there at the demarc.

If however, you have an open circuit (something not connected
that needs to be), you would never know the difference at the
demarc, but ... you -would- have dialtone, meaning the telco is
delivering dialtone to you and the problem is someplace in the
house.

I've seen several good links to phone wiring here; assume you've
at least looked at some of them.

Usually, in my case at least, the tech will grab the house wiring
and do a quick test on it, without asking, at which time you are
free to say something like "Thank you for the free test; that was
nice of you". G. Most techs are good working guys just like
us, so ... .

Pop