ML-S31D-20-HP is 1.25G SFP module with wavelength of 1310nm and 2 LC connectors for max. length of 20km - singlemode optic fiber. SFP module supports DDM.
LC connectors in SFP has grinding of ferule type UPC.
This module is suitable for HP switches with Pro-Vision (ProCurve) and ArubaOS software.