Grandstream Networks GXP2120 User Manual User Manual page 55

Call Waiting Tone Gain
Settings -> Audio Control
Headset Key Mode
Always Ring Speaker
Headset TX gain
Headset RX gain
Handset TX gain
Settings -> LCD Display
Backlight Brightness: Active
FIRMWARE VERSION 1.0.5.24
Configures the call waiting tone gain to adjust call waiting tone volume.
The default setting is "Low".
When headset is connected to the phone, users could use the HEADSET
button in "Default Mode" or "Toggle Headset/Speaker".

Default Mode:
 When the phone is in idle, press HEADSET button to off hook
the phone and make calls by using headset. Headset icon will
display on the screen in dialing/talking status.
 When there is an incoming call, press HEADSET button to pick
up the call using headset.
 When there is an active call using headset, press HEADSET
button to hang up the call.
 When Speaker/Handset is being used in dialing/talking status,
press HEADSET button to switch to headset. Press it again to
hang up the call. Or press speaker/Handset to switch back to the
previous mode.

Toggle Headst/Speaker:
 When the phone is in idle, press HEADSET button to switch to
Headset mode. The headset icon will display on the left side of
the screen. In this mode, if pressing Speaker button or Line key
to off hook the phone, headset will be used.
 When there is an active call, press HEADSET button to toggle
between Headset and Speaker.
Configures to enable or disable the speaker to ring when headset is used
on "Toggle Headset/Speaker" mode. If set to "Yes", when the phone is in
Headset "Toggle Headset/Speaker" mode, both headset and speaker will
ring on incoming call. The default setting is "No".
Configures the transmission gain of the headset. The default value is
0dB.
Configures the receiving gain of the headset. The default value is 0dB.
Configures the transmission gain of the handset. The default value is 0
dB.
Configures the LCD backlight brightness level (from 0 to 8) for phone's
active status. The default value is 6.
GXP2120/GXP2110/GXP2100/GXP14xx USER MANUAL Page 55 of 77