The SFPG1320C is a Cisco GLC-LH-SMD compatible fiber transceiver module that has been designed, programmed & tested to work with Cisco brand switches & routers. It delivers dependable 1 Gb E connectivity over fiber cable, for 1000BASE-LH compliant networks, with a maximum distance of up to 20 km (12.4 mi). Technical Specifications: Wavelength: 1310nm Maximum Data Transfer Rate: 1.25 Gbps Type: Single Mode Fiber Connection Type: LC Connector Maximum Transfer Distance: 20 km (12.4 mi) MTBF: 2, 722, 277 hours Power Consumption: Less than 1 Watt Digital Diagnostics Monitoring (DDM): Yes