The term direct calling is not clearly defined in the cloud telephony field. A direct call typically refers to establishing a connection to a previously defined subscriber, triggered by a specific action. Depending on the technology the phone uses and how the function is implemented, the action to be executed for direct calling can vary. This can for example be picking up the receiver or pushing any key on the phone. Other actions may be putting the receiver up to the ear or touching a specific icon on a touchscreen.