Electronic instruments namely, signal generators and analyzers, pulse and data generators, arbitrary waveform generators; spectrum analyzers, logic analyzers, waveform analyzers and oscilloscopes, network/spectrum analyzers, modulation-domain and time-interval analyzers, testing meters, digital multimeters, power meters, voltage meters, electric current meters, impedance meters, inductance meters, capacitance meters, and resistance meters, electronic frequency counters, atomic clocks, cesium clocks; software for monitoring telephone and network traffic; bar code readers; power supplies; interferometers, vibration transducers; electronic design automation simulation software, DC electronic loads; lasers not for medical use, all the aforementioned goods for use in testing, measuring, installing, troubleshooting and maintaining communications products, networks and systems; transmitters, frequency shifters, optical filters, optical beam splitters, fiber optical cables and cable connectors, fiber optical power meters and and test sets; digital transmission test sets; communication network test sets; computer test instruments, namely, protocol, network and signal analyzers; electronic voice quality cable, and fiber optic cable testers; computer and communications hardware and software for use in network management, network security, data acquisition, testing, and signaling in the the field of telecommunications