... optical transmission systems* Professional supply: SFP,GBIC,BIDI SFP,XFP,SFP+,X2 and XENPAK,CWDM,DWDM. OEM&ODM service is available, ... High Quality with CE,RoHs,FCC,ISO certificate. 1.25G 1000BASE-LH SFP ... 1310nm 40km SFP fiber transceiver module 100% cisco compatible