Fiber optic instruments, namely, Fiber Optic Optical Time Domain Reflectometers; Measuring or testing machines and instruments, namely, Visual Fault Locator; Test equipment, namely, power meters, optical loss testers, optical switches, visual fault locator for single mode and multimode fibers, live fiber detector, variable attenuators for creating a calibrated level of optical attenuation, Optical back-reflection meters, optical time-domain reflectometers (OTDR) to fully characterize the optical link, optical spectrum analyzer for measurement of optical device, dispersion analyzers for use with fiber optics, modulation analyzers for use with fiber optics, Visual fault locator (VFL) for use with fiber optics, resistive fault locator for copper links, copper and DSL timedomain reflectometers to fully characterize the copper link, power spectrum density analyzer, digital multimeter, voice frequency and wideband noise analyzer, voice frequency and wideband longitudinal balance analyzer, DSL and internet services analyzers, internet protocol testers for Ethernet, SONET/SDH and Fiber Channel; Telecommunications equipment, namely, analyzers for Optical Transport Network (OTN), Common Public Radio Interface (CPRI), Open Base Station Architecture Initiative (OBSAI), and spectral analysis; computer hardware and software and mobile device software applications for communication network testing, troubleshooting, analyzing, monitoring, management, emulation, optimization, characterization, and analytics