So all settings are at default values except the ones that will have been configured by the portal when you used it to set up GoogleVoice on the OBi. Yes or no?
If you don't already know the local IP address of your 200, dial ***1 and listen for it. Point a web browser at that address and log in with admin and admin. On the left hand side, click on Status and then on Call History. The right hand column of that will show what, if any, number the 200 is asking GV to call. Does it match you expect, remembering that GV does not accept 7 digit numbers.