Call your Google Voice number and test or call someone. Allows us to fully test without a true VOIP Provider, Spring 2012 we plan to go with 3CX. Have fun!---UPDATE: This may change but use sip2.remacservices.net to get full outbound/inbound as the sip.remacservices.net does not allow folks to dial inward to your Google Voice number.
From the very beginning, Google Voice users with Gizmo5 accounts have been able to make calls of unlimited length over SIP merely by initiating the calls at the Google Voice website. Since SIP is a computer-to-computer communication system, this means that users with devices capable of SIP communication can now enjoy free unlimited calling by Google Voice - Poly Community The Google Voice/Chan Motif addon interfaces with these protocols and not the SIP technology that Google Voice was built upon. I'm not personally familiar enough with other services that bridge SIP registrations with Google Voice in order to offer much of an insight on any alternatives. With that said, I wish you well in your endeavor. XChange Voice - Apps on Google Play Dec 07, 2018
Google Voice
As the only VoIP adapter on the market that connects to Google Voice™ or dozens of other VoIP services, you can slash your phone bill but keep the features you expect from your landline phone. OBi200 2supports one physical phone or fax machine but you can configure up to 4 VoIP services, including E911, through the easy to use OBiTALK portal. Google Voice VoIP calling is rolling out now, 100% next
While there are several Voice-over-IP (VoIP) devices on the market, Obihai's offering stands out from the rest because of its nifty use of Google's GTalk protocol to make completely free outgoing calls.
Mar 14, 2011 · Our whole point, however, is that Google will soon be associating their Google Voice numbers with SIP addresses. The fact that there are alternative solutions that exist today which bridge SIP and Google Talk’s XMPP client is nice for people who still want their free (or close to free) PSTN calls.