[saclark11]

Pretty much, yes. If you imagine “Bob” has a policy that he can only converse with numbers in his address book, then you could think of it as:

  1. -> Alice calls Bob

    1.a. Bob does not pick up the call, but adds the number shown from caller ID to his address book

  2. <- Bob calls the number (Alice) back
  3. -> Alice picks up and they talk happily