The S2106-S2 from Saluki Technology is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 0.8 m, Attenuation Dead Zone 6 m, Optical Wavelength 1310 to 1550 nm, Dynamic Range 36 to 38 dB, Pulse Width 3 to 20000 ns. More details for S2106-S2 can be seen below.