Google now requires a PIN. Period. They don't explain themselves, they just do things.
Simply program your home number into your phone, insert two pauses after the number, then your pin. When you call you'll automatically get connected. Very simple.
For those that don't know how to insert a pause into the dialing of your phone, check your manual. Often it's as simple as finding the pause key on your phone and sometimes holding it for 3 seconds. You need about 6 seconds of pause, 3 won't do it.