Q: Does GV have 'access numbers' that you can make calls via so that it looks like the call came from your GV number?
1) Use the app on your phone which will transparently create a temporary number that your device calls that then connects you to the other party. 2) Use the website/apps/apis to do a "Callback" where your GV number calls you, and once you answer, calls the other party 3) Call your own gv number, hit a key, enter your pin, then enter the number you want to dial (no internet required)