Cannot hang up after receiving a call to iOS

[atsakiridis]

In this scenario I used LinkSys phone to call the iOS Application. After the App answers and the call is established, if I try to hang up it fails. Sofia shows that a bye is sent to LinkSys, but no response is received.

Notice that the reverse scenario works fine; iOS App establishes a call with LinkSys and then hangs up fine

[atsakiridis]

Fixed with cf6ef7a