A device equipped with a camera and microphone includes the capability to send and receive video calls through a delivery system or other communications networks. The receiver includes an analog pre-filter that removes distortions and intersymbol interference from a predetermined transmission channel. The compression molding method being characterized by using the core punch in which the difference between the smallest diameter of the core punch at the protion for forming the center opening of the cylindrical tablet and the reference diameter of the portion in design is within 0.