That claim by a manufacturer means nothing. Use the link here to check:
http://members.shaw.ca/bsanders/FAQFAX.htm#_Toc88835131

Sorry. I don't keep track of third party fax software. If your modem is on
the list, we could enable diagnostic and PSS logging to try to track down
the problem, but it will take extensive registry hacks to do so.
--
Russ Valentine
[MVP-Outlook]
"John Vinson" <jvinson@STOP_SPAM.WysardOfInfo.com> wrote in message
news:d770n1h7o4h08ofgkg7bpvv7fu4gru4stm@4ax.com...
> On Mon, 7 Nov 2005 21:53:28 -0500, "Russ Valentine [MVP-Outlook]"
> <russval@gmail.com> wrote:
>
>>Are you sure that modem is on the Windows XP HCL list? Doesn't sound like
>>one to me.
>>--
>
> <checking...>
>
> (3CP2977-OEM, 3CP2977-OEM-50) U.S. Robotics 56K Fax PCI
> by U.S. Robotics CorporationCompatible with the following versions of
> Microsoft Windows
>
> Windows XP Professional Edition Supported
>
> Seems to be. Any suggestions on alternative software - or should I
> just get out the dartboard and the blindfold and put up a page of fax
> software ads from PC World <g>?
>
> John W. Vinson[MVP]
>