We are Geotero communications co., ltd. based in , China. We are member of Tradekey.com since October, 2011. Our business is related to Telecommunications industry and we specifically deal in sfp module. Please find our product details below: gpon module GPON Module GGU3412P-2DC Optical Transceiver for GPON ONU, 10~20km Reach Features Single fiber bi-directional data links with 1.25Gbps upstream and 2.5 Gbps downstream � sfp module SFP Module GSP3124-L2xx 1.25Gbps SFP Optical Transceiver, 20km Reach Features:Dual data-rate of 1.25Gbps/1.063Gbps operation;1310nm FP laser and PIN photodetector for 20km transmission Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.