- Unplug the power-supply unit from the socket.
- Press and hold down the paging key on the base station.
- Plug in the power-supply unit again.
- Keep the paging key on the base station pressed.
- Release the paging key after 3 seconds.
PLEASE NOTE! The entire contents of the memory will be deleted. All portable handsets will be deregistered. The system code will be reset to 0000.