Appendix
Alert tones and lights
Lights
/ANSWER ON 
On when the answering
system is on.
IN USE
On when the handset is in use, or when the answering system is answering an incoming call.
On when a handset is being registered.
Flashes when there is an incoming call or when a handset is being deregistered.
Flashes when another telephone is in use on the same line.
CHARGE On when the
handset is charging in the telephone base or charger.
Lighted display
Lighted key pad 
/SPEAKER�
On when the speakerphone is on.
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