DATA PROCESSING APPARATUS; COMPUTER HARDWARE, NAMELY, FIREWALLS; COMMUNICATION SOFTWARE FOR PROVIDING ACCESS TO THE INTERNET; INTERNET SERVERS; SOUND TRANSMITTING APPARATUS; APPARATUS FOR TRANSMITTING AND REPRODUCING SOUND OR IMAGES; ELECTRONIC AND OPTICAL COMMUNICATIONS INSTRUMENTS AND COMPONENTS, NAMELY, DIGITAL TRANSMITTERS; TELECOMMUNICATIONS EQUIPMENT, NAMELY, FIBER-OPTIC TRANSCEIVERS, FIBER OPTIC REPEATERS, CONVERTERS AND OPTIMIZERS, WAVE DIVISION MULTIPLEXERS, FREE-SPACE OPTICS TRANSMI...