I use PC faxing a lot and have just upgraded to XP Pro. I have stutter dial tone on my BT line and have set the modem to not wait for dial tone. The modem can dial out to my ISP as can hyperterminal. However, when sending a fax I always get the error no dial tone.
My modem provider has been great at proving that the modem is OK, so now it looks like the software.
I have tried explicitly putting ATX3 (Hayes don't wait for dial tone) in the pre-dial string.
All suggestions gratefully recevied.