A communication device and a method for transmitting data in wireless local area networks is provided. The method includes forming a workpiece of boron nitride having a wurtzite crystal structure, and optionally combining boron nitride having a cubical crystal structure with the wBN material. When the dial key signals of the dial device are inputted and the dial device is not connected, that is, a user is pressing a phone number, the values corresponding to the inputted dial key signals are sequentially stored in a first memory. The invention also provides methods of treating such diseases and conditions, and compositions etc. The encoder provides timestamp information to the data packet stream generator and the data packet stream generator synchronizes annotation data from the annotation source with a video signal from the video source in response to the timestamp information. The present invention uses at least one ultrasonic transducer coupled to a component of the optical fiber draw tower, such as the coating die, curing stage device or sheath, to emit ultrasound to the coating of the fiber.