opkald(A voice session that can be conducted between two or more telephones, two or more devices (such as computers or smartphones), or between two or more such devices and telephones); ringe op(To attempt to establish a voice conversation with another person or other people from a phone, computer, or mobile device)
Opkald(An app for making video calls); Ring op(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)
