The window shows information about active devices, and there states. You may select devices on settings window.

Device name: Device name.

Hardware sensor: shows phone hook switch state. Not all devices have build-in hardware sensor. Most modems do not have one.

Software sensor: shows whether program picked up the call or not.

Action: describes current action.

Duration: shows how much time the action lasts.

Caller number: Caller number for incoming calls. Called number for outbound calls. Not all devices support outbound phone number detection.

Caller name: Caller name for incoming calls. The name is shown exactly as it was received by hardware. phone book is not involved.