To activate the headset mode:
Press HEADSET on the phone.
The HEADSET key LED illuminates solid green when the headset mode is activated.
Press the line key or the Answer soft key to answer a call, the call will connect to your headset automatically.
To deactivate the headset mode:
Press HEADSET again on the phone.
The HEADSET key LED turns off when the headset mode is deactivated.