The SFP1000EXST is an MSA compliant fiber SFP transceiver that’s designed, programmed & tested to work with 1000BASE-EX compatible MSA switches & routers. The SFP transceiver module supports a maximum distance of up to 40 km (24.8 mi) & delivers dependable 1 Gb E connectivity over fiber cabling. Technical Specifications: Wavelength: 1310nm Maximum Data Transfer Rate: 1.25 Gbps Type: Single Mode Fiber Connection Type: LC Connector Maximum Transfer Distance: 40 km (24.8 mi) Power Consumption: Less than 1 Watt DDM: Yes