There are various online fax operations which employ different means of sending online faxes. You might need to fix a kind of software for online fax that they would provide on your own computer. The software generally comes with a user friendly interface that guides you all through the method of fax sending.
It permits the user to select the files which you wish to send like faxes. At times, you might need to convert it to different file formats such as TIFF or PDF to send as fax.
There are other services which employ the encrypted site servers to send the faxes. You should log into the sites with a password and login name, upload the files, convert these to proper file formats then send these files to the required fax numbers. These online operations even offer virtual (local), fax or toll free numbers based on the location. It permits you to get the faxes online. Again, these might have the set up fees and additional costs involved.