Bluetooth "Fax Forwarding" from WinXP Fax "printer"?

Unfortunately, I have no phone line in my office space. And I need to send
faxes every once in a while.

I have a Motorola V551 cellphone with Bluetooth, and it offers the
capability of "Fax Forwarding", among its two or three "fax" functions.
AFAIK, the phone itself has no real modem on it (hard or soft), but the
folks at Cingular were kind ($$) enough to provision me with a CSD
(Circuit-Switched Data) phone number.

I have a Bluetooth-capable laptop with WinXP Pro. I think I should be able
to use something like the fax "printer" in XP to send faxes to this CSD
number from MS Word. Unfortunately, I don't know how to set things up to do
that. I wasted a lot of time with the Bluetooth Setup Wizard in XP trying
to install a "Bluetooth Fax" before coming to the conclusion that I was
barking up the wrong tree, since the CSD modem itself is located off-site
somewhere in a Cingular service center. Perhaps the setup is more analogous
to a dialup ISP?

Can anyone help me perform this configuration?

Thank you!