Google's SIP Tease

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!

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