Can I just connect my fax machine and only use it with the free Google Voice service and will that work? If possible, I only choose to fax with Google Voice and not Obi-Talk's paid fax service. Also as you can probably tell, what I'm trying to do is for home use and I rarely send and receive faxes
I'm a newcomer to Obitalk with no experience
I use a GV Line for Fax all the time. In fact I have one dedicated for Fax.
You can use the default settings however I recommend you have a look at this post if you want the line to be dedicated to Fax and as fast as possible.
http://www.obitalk.com/forum/index.php?topic=17418.msg111010#msg111010
Of course if you will use the same GV line for Voice and fax you probably should not do those tweaks and just live with slower faxing.