AT&T TL7610 ユーザーズマニュアル

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Operation
Headset base light status
NO LIFTER MODE
On when 
NO LIFTER MODE is 
selected (default mode).
Flashes quickly when there is an 
incoming call.
Flashes when the headset is in use 
or another telephone is in use on the 
same line.
LIFTER MODE
On when 
LIFTER MODE is selected. 
Flashes quickly when there is an
quickly when there is an 
incoming call.
Flashes when the headset is in use.

MUTE
On when a call is muted or you are 
registering a headset. 
Flashes when you are de-registering 
headset(s) or a dial pad from the 
headset base.
NO LIFTER MODE
LIFTER MODE
MUTE
Headset base
Indicator lights
Indicator lights