title: PBX Call makes another call and spy
body: <p>When a user makes a call to my pbx, he needs to enter another phonenumber. Then asterisk should call that number and when the owner of that number takes the phone, asterisk should play a sound.</p>
  
  <p>The user who made the call to my pbx, can listen live to the other call, he will hear the sound played from the pbx and the sound of the user.</p>
  
  <p>What is the best way to do this?</p>