I'm not so think as I smart I was....the fax problem was not with the
clients machine at all, it was a setting in my software.  When I faxed long
distance and was successful, it was to another area code (my state has one
area code only).  When I faxed long distance within the state, the software
was recognizing the long distant number as a local number since we shared
the same code even though we were 400 miles apart.  I removed reference to
my area code so the software didn't know where I lived, and adjusted the
phone book to reflect the client's  long distance fax number
(1-701-xxx-xxxx) and voila!, a solid connection!  Sometimes I overlook the
simple solution.  BTW, the client bought a new fax machine and I'm not going
to tell him it was for naught!!  Thanks to all who chipped in with
suggestions.

Bart