9 MODULAR PLATFORMS PROVIDING CONVERSION BETWEEN ELECTRICAL SIGNALS, RF SIGNALS, AND OPTICAL SIGNALS; OPTICAL COMMUNICATION EQUIPMENT AND SUPPLIES, NAMELY FIBER-OPTIC TRANSMITTERS, RECEIVERS FOR FIBER-OPTIC COMMUNICATIONS SYSTEMS, CABLE CONNECTORS AND RECONNECTORS, FIBER-OPTIC CABLES, AMPLIFIERS, ELECTRICAL POWER SUPPLIES, FIBER-OPTIC CABLE COUPLERS, POWER MODULES, AND OPTICAL SWITCHES FOR THE TRANSMISSION OF VOICE, VIDEO AND DATA