The S2112-T1 from Saluki Technology is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 0.8 m, Attenuation Dead Zone 4 m, Optical Wavelength 1310 to 1550 nm, Dynamic Range 30 to 32 dB, Pulse Width 3 to 20000 ns. More details for S2112-T1 can be seen below.