Cisco GLC-LH-SM Compatible 1.25G SFP Optical Transceiver 20KM ITEM NO.:ES3112-3LCD20 DATA RATE:1.25G DISTANCE:20KM CONNECTOR:LC PRODUCT ORIGIN:Made in China SHIPPING PORT:ShenZhen Package type: Individual package or 10pcs/package Features 1.Data-rate of 1.25Gbps operation 2.1310nm FP laser and PIN photodetector for 20KM transmission 3.Compliant with SFP MSA and SFF-8472 with duplex LC receptacle 4.Digital Diagnostic Monitoring:Internal Calibration or External Calibration 5.Compatible with SONET OC-24-LR-1 6.Compatible with RoHS 7.+3.3V single power supply 8.Operating case temperature:Standard : 0 to +70ï¼? Extended : -20 to +85ï¼?Industrial : -40 to +85 Applications 1.Gigabit Ethernet 2.Fiber Channel 3.Switch to Switch interface 4.Switched backplane applications 5.Router/Server interface 5.Other optical transmission systems