Create a FaceTime link on your site

I created a link to call someone using facetime using the spec provided on the Apple dev site :

<a href="facetime:user@example.com">Connect using FaceTime</a>

      

        
        
        
      

    

However, when I click the link in iOS Safari, it will prompt the user if they want to call " user@example.com ", but when you click the FaceTime link in the prompt, it just opens the FaceTime app without passing the address " user@example.com " to make a call.

What am I doing wrong?

FYI: This is on iPad iOS using 8.1.1.