Handset indicator lights
Incoming call light
A visual ringing indicator that flashes when there is an 
incoming outside call or intercom call, or the telephone base 
is paging all handsets.
Extra large lighted display
CHARGE light
On when the handset is charging in the telephone base  
or charger.
Big button lighted key pad
On when a call is coming in or a key is pressed.
 /SPEA�ER light
On when the speakerphone is in use.
Screen icons, indicator lights and alert tones
Telephone base indicator lights
Incoming call light
Flashes when there is an incoming call.
IN USE light
On when the handset is in use, when the answering system 
is answering an incoming call, when the answering system 
is being accessed remotely, or when the telephone base is 
registering a handset.
Flashes slowly when another telephone on the same line is 
in use or when the telephone is deregistering all handsets.
Flashes quickly when there is an incoming call.
/ANS ON light
On when the built-in answering system is on.