The S2106 from Saluki Technology is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 0.8 to 1 m, Attenuation Dead Zone 6 m, Optical Wavelength 850 to 1625 nm, Dynamic Range 26 to 45 dB, Pulse Width 3 to 20000 ns. More details for S2106 can be seen below.