Send fax through Windows XP os

I would like to send fax through the Windows XP OS.

1. I’ve loaded Fax Services using Windows XP.
2. I’ve Hp officejet all-in-one.
3. I’m able to send the fax manually through the printer.
4. Connected a phone line to the printer.
5. Connected the USB cable of the printer to the PC.
6. Need to send fax from my pc.

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am I missing any pre-requisites to fax through the OS?