Grandstream Networks GXV3240 Administration Manual page 92

Firmware Version 1.0.3.6
HEADSET button in two different modes:
1. Default Mode

When the phone is in idle, press HEADSET button to offhook
the phone and make calls by using headset. Headset icon will
display on the top of the call screen in dialing/talking status;

When there is an incoming call, press HEADSET button to
pick the call by using headset;

When there is an active call using headset, press HEADSET
button to hang up the call;

When Speaker/Handset is 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
previous mode.
2. Toggle Headset/Speaker

When the phone is in idle, press HEADSET button to switch to
Headset mode. The idle screen will display a Headset icon. In
this mode, if pressing Speaker button or entering digits,
headset will be used by default;

When there is an incoming call, press Answer icon on the
screen or Speaker button, headset will be used;

When there is an active call, press HEADSET button to toggle
between Headset and Speaker.
GXV3240 Administration Guide Page 90 of 105