You can have GV forward calls to a US number (landline or cell). You can call your own GV number from a phone registered to it and make additional outgoing calls from your GV number. You can use an OBi device connected to your GV number.
Didn't know that.
Not sure why I would need that, but good to know for the future.
And need to buy an OBi device one of these days and hook it up for my landline vs paying for one.
But when I said google voice I meant when you're abroad, how to use your GV number to forward to a non US number or the like.