ring(To create a sound, vibration, visual cue, or any other indication that the user has an incoming call); call(To attempt to establish a voice conversation with another person or other people from a phone, computer, or mobile device)
Call(A Lync menu that opens a list of options for the selected person. In Office Communicator, a menu item that opens a list of numbers for the selected person. When the user selects a phone number, Lync or Office Communicator places the call)
