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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
electronic measurement apparatus; namely, integrated services digital network (isdn) network termination tester; iddn signal balance ratio bridges; isdn bit error rate testers; isdn impedance bridges; computer software for use in d-channel monitors; monitors for international telegraph and telephone consultative committee (ccitt) signalling systems; level generators; digital level meters; line patch/intercoms; speech attachments and two-wire switch-overs; af (audio frequency) sweep measuring setups for various frequency ranges; level measuring sets for frequency ranges; selective level meters; balancing attachments; audio analyzers; universal networks and filters; noise generators for acoustic medical control system and telecommunications measurements; storage display units with digital image storage for use with selective level meters; transmission system analyzers; t.v. pilot level meters; milliwatt power meters, remote access switch systems for selecting coaxial test points; remote access switches for selecting coaxial test points; test point selectors for various frequency ranges; white noise measuring devices for noise and noise power ratio (npr) measurements; filter and converter plug-in units; fiber optics sources (led); fiber optics sources (laser); optical power level meters; optical attenuators; fiber optics test kits for lan (local area network) and telecommunications applications; fiber optics test adapters and cables; spectrum and network analyzers; computer software for use in measuring crystal equivalent circuit parameters; computer software for use in control and evaluation of system network architecture (sna) equipment; radio-link measuring equipment for distortion measurements on radio-link and satellite systems; data circuit test sets for measuring impulsive noise and interruptions; data line analyzers; telephone channel simulators; data network diagnostics equipment for ccitt data communications interface standards v.24, v.35, x.20/x.21 and electronic industries association (eia) rs-232 computer interfaces; analog switching units; rack cabinets; computer software for use in network management; data performance analyzers; data analyzers; interface converters; teletext testers; data testers; modem testers; interface testers; voice frequency pulse code modulation (pcm) testers; signalling testers; pcm channel measuring units for measurements on pcm coder/decoders between analog and digital interfaces; test point scanners; pcm channel generators; error ratio measuring sets for measuring bit, block, and code error ratios on data channels; digital error detectors; jitter generators; jitter meters; analyzers for comprehensive testing of network elements and digital transmission systems; jitter modulators; regenerator measuring devices for measuring noise immunity of regenerators; cable simulators; frame analyzers; ac (alternating current) power line harmonic analyzers; ac voltage stabilizers; measurement subsystems comprised of level meters, transmission system analyzers, and remote access switches for automatic measurements on frequency division multiplexing (fdm) systems; integrated measurement and surveillance systems comprised of measurement subsystems for network configuration and remote measurements on fdm systems and for centralized monitoring and measurements on fdm systems; satellite test systems comprised of a radio-link measuring setup, transmission systems analyzer, and white noise generator for semi-automatic line-up of satellite links; digital multiplexer test systems comprised of an error measuring unit, a filter generator, a filter meter, a spectrum and network analyzer, a return loss bridge, a frequency counter, a digital storage oscilloscope, and a control computer; automatic test systems comprised of a channel test set and a test point scanner for testing pcm circuit modules and systems; automatic monitoring systems; automatic monitoring systems comprised of a mainframe, an alarm collecting unit, and a multiplex analyzer for digital communications equipment; submarine cable measuring systems comprised of a selective level test unit, a level generator, a data logger, and a test point scanner for automatic monitoring of undersea fdm cable systems; functional test systems comprised of a channel measuring unit, an analog, digital and pattern generator, and a test interface for conventional telecommunications applications; functional test systems comprised of a channel measuring unit, analog mainframe, test interface, mainframe and digital oscilloscope for testing isdn applications; versa module europa bus (vmebus) extensions; universal test interfaces; systems racks; accessories; namely, barcode interfacers, probes, ac line adaptor/charger units, bridges, impedance measuring attachments, baluns, two-way splitters; power supplies; cables, change-over switches, coaxial chokes, dc (direct current) loop holding circuits, cable connectors, adapters, attenuators, terminations, standard mismatches, z-matching pads; equipment cases, storage containers and dust covers for the foregoing