My family use Facetime to connect NZ and UK based members.

We always organise the connection ahead of time. 

But as I just bought my own i-thingy, I was wondering if it works if the other end is not expecting me to call.

I asked my family members but they dont know as we ALWAYS organise ahead.

If the receiver has their ipad closed for instance, will it still ring, or does it only ring if the device is unlocked and in use?