It can be done by simply hitting redial, this will cause the phone to go offhook and dial the previous number. It is possible for the called party to terminate the call, however the calling party (home phone) would eventually disconnect and reorder tone would be played. I don't know what the disconnect cause code would indicate for the home phone. So it is possible to do this with a mechanical device by depressing the redial button.
Believe it or not, I have a Vtech phone in my lap (I set it down to type). I have no idea if it is the same model, but it is a Vtech 5.8ghz phone. When I hit redial on it (redial is the bottom right key on the phone) and then hit redial again, the phone beeps at me. It does not dial the number. I have to hit the Talk button before it will dial the call. When I hit redial, the screen says "Redial" and the number it is to dial. But it will not dial by hitting it twice.
ETA: Model number is CS5111 (I found it on the base).