being able to call a toll free number from google voice allows you to call a toll free ANAC like 800-444-4444 or 866-MY-ANI-IS so that you can see what is being passed as your ANI when you make a call... if you find that the ANI fails, or does not provide a complete number as GV previously has done (with the 585 being all that was passed) then you could op-divert to spoof your ANI to whatever you wish thru an operator...
there are other cool things that you could do with toll free numbers (scan for carriers, test numbers, etc)... and it is always good to find a way other than your own phone line to call toll free numbers on, since they use ANI to obtain your telephone information and not CID...
Even with the ANI as 404-260-5532 it is great for privacy. All the toll free number owner can find out is that the caller is using google voice and dialing out from voicemail after dialing with caller ID blocked, and that is provided that the toll free number owner bothers to google it and finds this thread.
Of course there are tons of voip providers that offer free termination to toll free numbers, without even having an account. I remember there was a large list of them somewhere but can't find it off-hand.
Edited by Skunkworks, 14 December 2009 - 07:59 PM.











