... time, extension number, call status, conversation time, information of incoming calls, program status can be displayed. 2.Incoming Call Light: Adopting ... ringing, whenever you are under noise environment or far from the phone. 3.Mute Key: For muting (including handset talking, earphone ... , handset, earphone and ring. 10.SPK Key: For hand free talking. 11.CONF Key: For making a conference call. 12 ...