... Calibration or External CalibrationCompatible with SONET OC-24-LR-1Compatible with RoHS+3.3V single power supplyOperating ... ChannelSwitch to Switch interfaceSwitched backplane applicationsRouter/Server interfaceOther optical transmission systems* Professional supply: SFP,GBIC,BIDI SFP,XFP,SFP+,X2 ... ,ISO certificate. 1.25G 1000BASE-LH SFP 1310nm 40km SFP fiber transceiver module 100% cisco compatible