This was possible because Google supported XMPP, which enabled connectivity to the Google Voice website without logging in. This solution worked perfectly and served me well for a year and a half. Unfortunately, Google has decided to end support for XMPP on May 15, 2014.
Obihai listed some Voip alternatives on their blog that would support their adapters after the GV shutoff. I checked out most of the providers on their list. I wanted something that would be easy to configure and inexpensive.
Here are some of the listed services that I could have transitioned to and kept using my Obihai adapter:
I ended up choosing Vestalink (which is NOT listed above) and opted for the Residential Lite BYOD plan (bring your own device – since I already have the VoIP adapter). While not free, it’s pretty inexpensive at $25 a year. Compared to the $30 per month I paid Comcast, it’s still a heck of a deal. The plan includes 500 minutes of local and nationwide calling – more than enough for my usage needs. Setting up my adapter was easy as Vestalink has a utility that configures the device automatically. I was up and running in a few minutes without any fuss.
I’ve been forwarding my number for the time being rather than porting my number over from Google right away. So far the service has been perfect, so I’ll probably start the porting process soon. The porting cost is only $10 which is a bargain.
In a few months, I’ll write a follow up post / review of the Vestalink service and my ongoing experience with it .
— UPDATE – 11/21/2014 —
Vestalink is currently running a Black Friday special offering
40% off any plan using the code blackfriday!