Auto Answer??

I have a Samsung R450 Messager

Wondering what the Auto Answer setting does? I can set it to Off, after 1 Second, 3 Seconds, or 5 Seconds.

When I set it to any of the after _ seconds, nothing different happens when I call the phone from another phone.

What is suppose to happen? It seems it would either automatically 'press send' so-to-speak and answer the call after so many seconds, OR send the call to voice mail after those many seconds.
Neither seems to happen when I have it set.

Am I not understanding the function?

And is there a way that I can set the phone to automatically send calls to voice mail after so many seconds?

Thanks

You camn use it if you are driving for instance and you want to let the phone answer without pushing a button. You have to remember to turn it off or it will answer every call even if it's in another room and people will be confused