The handset includes a status lamp positioned between the power and mute buttons. During normal operation the lamp flashes twice every 5 seconds. However, the lamp is used for a range of other status indications as listed below.
Handset State
Lamp
Power on: Press the power button for 2.4 seconds.
4 flashes
Power off: Press the power button for 3.2 seconds.
3 flashes
Handset is in pairing mode: Press the power button for 10 seconds. The handset remains in pairing mode for 150 seconds.