Ending a call depends on the mode you used to answer the call; however, all calls may be ended by using the “Drop” soft key to end the currently highlighted call.
If you are using the handset, place it back in the receiver to end the call.
If the call is on speakerphone, pressing the lit “Speakerphone” button will end the call.
If the call is on the headset, you can press the lit “Headset” button on the phone or press the “Hook Switch” button on the headset to end the call.