I have an HP Officejet 8600 Pro that has faxing capabilities. However I do not send faxes often and I do not need to pay for a dedicated fax number/line. Is there a way to send and receive faxes using the built in wifi without a fax number from the HP? I have seen online services that allow this from the PC, is that the only way to do this? I am using Windows 7 for my OS.
EDIT I do not use a regular phone line.