Profile: Advanced Fiber Solutions, Inc. concentrates on the development of complete fiber optic test equipment solutions. We develop and support fiber optic test equipment. We provide new quad wavelength micro OTDR. We offer five models, three single mode versions with different dynamic ranges, one multimode version, and our newly introduced quad multimode/single mode model. Each unit is powered via the PC USB port, and requires no batteries or external power supply. Our advanced fiber solutions power meters are the perfect tools for measuring optical power, loss (attenuation), and optical return loss in any system. All meters are calibrated at industry standard wavelengths for both single-mode and multimode transmitters.