http://www.usrobotics.com/support/3453/3453-command-ref/chap%204-modes...of%20op
I suspect the "old" fax machine may be a class 1, and your modem set to
class 2 (See the above reference)
Setting your modem to class 1 may or may not help. To add insult to injury,
some fax programs work better in
one mode or the other.
It's also possible that you didn't obtain a phone connection that is good
enough to send a fax to the receipient.
In a few cases, usually involving something other than "POTS" phone service,
the phone provider has locked out
Fax service, and restores it for a fee..
"joe" <joe RemoveThis @nospam.com> wrote in message
news:OeKdnXsZa72z3lfYnZ2dnUVZ_uuqnZ2d@wavecable.com...
> I have been able to transmit faxes without problems using
> a cheap USB external modem and XP fax console, but I have
> one recipient who has an old Brother Personal FAX-275
> thermal fax machine which I cannot get to receive my faxes.
> I don't know if it's because that old fax machine might
> use a different fax protocol or what.
> Does anyone have any tips that can be used either by myself
> or the recipient when I try to send a fax to an older model
> fax machine?