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Cisco P/N: GLC-LH-SM40 1000BASE-LH SFP transceiver module for MMF and SMF, 1300-nm wavelength, extended operating temperature range and DOM support, dual LC/PC connector Wave Length:1310nm Data Rate: 1Gb/s Reach: 40km Fiber Type:SMF TX Power (dBm):-10~-3 Rx Sens. (dBm):?-22 DDM/DOM: Yes Temp. Range(?):0~70 Application Catalyst Express 500 Metro Ethernet Catalyst 35XX Switches Catalyst 36XX Switches Catalyst 37XX Switches Catalyst 38XX Switches Industrial Ethernet and Smart Grid Catalyst 4500/4500X/4900 Switches Catalyst 6500/6800 Series Switches Data Center and Blade Switching Router Appliance Wireless LAN Controller