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20
Base
Find Phone
Press to ring all registered handsets, 
helpful for finding a missing handset, 
see page 25.
Also used during the registration 
process, see page 50.
ChargingPower / In use
Phone
Power In use light
On when there is  
power to the base. 
Flashes when the line 
is in use or registration is 
taking place.
Red charging light
Battery charging light. 
On when the handset is 
in the base charging.
1662 BT4000 UG [3].indd   20 09/04/2013   15:03