Topstar, are one of the leading manufacturers of Fiber Optical transceivers. Our excellent Research an Development ability combined with our strong Manufacturing capacity, create the One-Stop souring of high Quality Product platform for our customers. Topstar believers in Innovation, we attracted a pool of "the Best of Best" Engineering experts in the market to create our high-end brand products so called "Top-trans". We continuously invest in our R&D in order to maintain our leading position in the Market. Topstar proudly owns 3,000 Square Meters complete Dust-Free workshop and together with 30 dedicated engineering experts in the R&D! Applying the industrial best Management Practice combined with full arrange of test equipment, we stand to be the expect in Optical Transceiver filed. These expertise enables us the ability to supply almost full series of High Quality products, including: 1*9,SFF, GBIC, X2, XENPAK,SFP, SFP+, EPON, GPON, XGPON, BIDI, CWDM, DWDM, CSFP, 40G QSFP+, 100G CFP.We provide not only solution, but also Value Added services Besides O EM transceivers. We also have rich sources and significant stock for our Branded Optical Module products namely: Finisar, Cisco, AvaGo, Juniper, Sources, etc. We guarantee 100% original and all come with one year warranty to satisfy your one-stand purchasing. 1.More than 10 years experience in the field of Optical Fiber Modules. 2.More than 20% year-on-year growth in sales during the past 8 years. 3.Excellent track records with 8 years continuously no single major quality problem. 4.500+ customers installed based globally including major operators.5.OEM & OD M capability for major Telecom Equipment Vendors. 6.ISO9001, CE, FC, 3C, ROHS, etc. Certified. 7.Stock holds more than 200,000 transceiver modules at any one time for immediate delivery. 8.100% in production testing equipment capable.