How can I setup my Obi 110 used with a Google Voice number so that only people whose phone numbers are on a whitelist I setup can ring my phone even though I will have NO second phone number for Google Voice to forward calls to. I plan to connect all my in-house phones directly to the Obi 110 box and to nothing else.
In case this cannot be done when Google Voice is used, then I will be happy with any method, even one that does not make any use of Google Voice, that gives me a free phone number that I can use to make/receive calls in the USA, uses my OBI 110 box, and lets me setup a whitelist.
Thank you very much for any help you can provide.