Alert tones and lights, Handset alert tones, Telephone base alert tones – AT&T TL86109 User Manual
Page 134: Handset indicator lights

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Appendix
Alert tones and lights
Handset alert tones
Two short beeps
You are pressing
or
when the volume is already at its
highest or lowest setting.
-OR-
You have reached the end of the caller ID history.
Three short beeps
The handset is out of range while on a call.
Three short rising beeps
The telephone has completed the command successfully.
Four short beeps
The cordless handset battery is low.
Telephone base alert tones
Beeps once every 10 seconds
You have new message(s) in the answering system.
Handset indicator lights
CELL
On when the cell line is in use.
Flashes quickly when there is an incoming cell call.
Flashes slowly when a cell call is on hold.
CHARGE light
On when the handset is charging in the charger.
1 LINE/FLASH or 2 LINE/FLASH
Flashes quickly when there is an incoming line 1 or line 2 call.
Flashes slowly when a line 1 or line 2 call is on hold.
Backlight (lighted display and dial pad)
On when a key is pressed.
/SPEAKER
On when the speakerphone is in use.