telecommunication services, namely, personal communication services; message relay service to deaf persons; the operation of telecommunication transmissions and telecommunications networks; satellite transmission services; paging services, cellular telephone services; providing telecommunication connection to a global computer network; facsimile transmission services; PBX dialing services; leasing and rental of telecommunications equipment and accessories; the operation of client care, information help-lines and operation services in connection with provision of telecommunications services and telecommunications equipment and accessories; and electronic store-and-forward messaging