203. Call functions■ Make and answer a callTo make a call, enter the phone number, including thecountry code and area code, if necessary, and press thecall key. Press the volume key to adjust the volume of theearpiece or headset during the call.To answer a call, press the call key. To end a call or toreject an incoming call, press the end key.■ Conference callingConference calling (network service) allows you to takepart in a conference call with another two participants. Tocall a third party during a call, select Options > New call.Enter the number you want, and press the call key. Whenthe new call is answered, press the call key to connect thecalls. To end the conference call, select Options > End allcalls, or press the end key.