Disables the voice packet transmission to the phone's network interface.
To enable/disable MUTE, press the MUTE button during a call.
Flash to transfer the call.
To transfer the call, simply press the FLASH button.
Press the HOLD button to hold a call and press it again to release.
Use to dial or talk without picking up the handset.
To take advantage of the speakerphone, first press the Speaker Phone
button and make sure the IN USE LED lights up.
Next, enter the destination phone number via the dialing pad.
Press the Speaker Phone button again when finished with the call.