9 DATA COMMUNICATION PRODUCTS, NAMELY, MODEMS, MODEM ELIMINATORS, MULTIPLEXERS, MODEM SHARERS, PRINTER SHARERS, PORT SHARERS, SYNCHRONOUS INTERFACE CONVERTERS, ASYNCHRONOUS-TO-SYNCHRONOUS CONVERTERS, SERIAL/PARALLEL CONVERTERS, INTERFACE CONVERTERS, FIBER OPTIC CONVERTERS, DATA COMPRESSORS - NAMELY, DATA COMMUNICATION EQUIPMENT CONNECTED BETWEEN COMPUTERS AND MODEMS TO COMPRESS DATA, CARRIER CONTROL SIMULATORS, TERMINAL ADAPTORS, TAIL END ADAPTORS, POWER SUPPLY ADAPTORS, LIGHTNNG ARRESTORS, LOOP GENERATORS, DATA/VOICE SEPARATORS, SPOOLERS, REMOTE ACCESS SWITCHES, TRUNK ACCESSERS AND DIAGNOSTIC TESTING APPARATUSES FOR USE WITH THE ABOVE