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telecommunications products, namely, telecommunications switches, multiplexers, concentrators; computer programs for managing telecommunications networks; voice and data transmitting and transceiving equipment, namely, telecommunication transceivers, central office and remote terminals, network multiplexers; data communication multiplexers and concentrators; digital loop transmitters and receivers, digital loop coders and decoders and concentrators; wired and wireless controllers for controlling the transmission and reception of telecommunications signals transmitted through wired and wireless telecommunications networks, wired and wireless transceivers, wired and wireless base stations; video teleconferencing products, namely, video transmitters and receivers, video compressors, coders and decoders, video display monitors, video cameras, loud speakers, microphones, keypads, coders, decoders, multipoint controllers, computer programs for operating the videoconferencing equipment