Earlier this year, I had posted a hack for making free phone calls with Google Voice, Gizmo, and Asterisk. Since then, Google closed the door on inbound SIP calls and thus the hack no longer works. Fortunately a new possibility has emerged that makes it possible once again.

Nerd Vittles has put together another great hack for making free calls with Google Voice and Asterisk: Orgasmatron V, Google Voice Edition. It makes use of an Asterisk Linux distribution called PBX in a Flash. After installing PBX in a Flash, you download and run the Orgasmatron V script, and you have a fully-functional Asterisk system ready to make free calls with Google Voice.

In his instructions, NerdUno recommends using IPkall or SIPgate for a ringback number that is necessary for Orgasmatron V to work. It is actually possible and relatively easy to also use Gizmo as the ringback number, which I will explain in this post. His directions for setting up Orgasmatron V are very detailed and relatively easy to follow, so I won’t repost them here. Just follow his directions up until t