All you need to do is to go to your OBiTALK dashboard page, click on your OBi 202, then get into Expert configuration mode. In Expert mode, click on Voice Services, then click on the SPx that is using Google Voice. Find the parameter on the right side of the page, "X_AcceptSIPFromRegistrarOnly", and enable it by adding a check mark. You must remove both check marks to the right of the parameter to be able to edit it. After check-marking it, scroll down and click the "Submit" button. See the attached screenshot.
Note that this setting has been updated in the OBiTALK XML template for Google Voice, so that all new Google Voice configurations should already have this setting enabled. Only users who configured Google Voice before the template was changed may need to manually fix it.
