telephone and telecommunication equipment; namely, central office, local, tandem, and gateway switches; wire and wireless private automatic branch switches; data packet network switches; frame relay switches; remote switches; cellular mobile telephone switches; base site controllers, transceivers and test bays; microwave radios and transmission systems, automated attendant switches; traffic billing operator terminals; headsets; telephone jacks; line connectors; video and text terminals; maintenance administrative terminals; copper cable; patch panels; mechanical splices; cable strippers; couplers; attenuators; multiplexors; line concentrators; multiplex terminals; loop carriers; short to long haul inter-office transmission hardware; analog and digital radios; antenna; codecs; channel banks; repeaters; repeater and span lines; network local test cabinets; network remote test units; network loop reporting and test systems; network test operational support systems; digital announcers; billing media converters; paging and response systems comprising key services modules and hand free terminals; rectifiers; direct current to direct current converters; ringing machines; tone machines; telephone and transmission software; semiconductors; transformers; diodes; resistors; capacitors; transistors; tape drives; and read only memory on compact disk; computer telecommunication software for recording, storing and delivering voice messages; automatic call distribution software; intelligent networks comprising signal transfer switching point link software, and signal control point databases; optical sources and optical detectors

[installation, maintenance and repair services in the field of telecommunication equipment]