As has been reported everywhere, last week Gizmo5 users learned that Google will soon be hanging up on this open-source softphone. Acquired by Google in 2009, the SIP-based Gizmo5 service will do its last “INVITE” in early April.
Now some fleeting good news: Over at OnSIP, the cloud-based PBX company, there’s an interesting post about a SIP door that opened over the weekend and then just as mysteriously closed.
For a shining moment, Google Voice numbers had associated with it a SIP address of the form: +1GVnumber@sip.voice.google.com.
In other words, it was possible for a few days to make free calls on any device that supported a SIP stack!