# TOPSTAR TECHNOLOGY INDUSTRIAL CO., LIMITED | QSFP 100G 40km APD Receiver,APD Receiver LWDM4 QSFP28-ER4,QSFP28-ER4 QSFP 100G 40km, 100G QSFP28 4x25G LWDM4,100G QSFP28 4x25G LWDM4 1310nm,LR4 100G QSFP28 4x25G LWDM4, SR4 100Gbs Optical Transceiver Module,qsfp28 sr4 850nm 100m,MPO Connector qsfp28 sr4, ## summary > Manufacturer, Distributor/Wholesaler, Importer, Exporter, Brands: Top-Trans, Topstar Technology Industrial Co., Ltd. is a professional sfp optical transceiver module manufacturer integrating R&D, production, sales;, Established in 2006, Employees: 200~250, Annual sales: 20000000-30000000, Export ratio: 70% - 80%, Primary markets: North America, South America, Western Europe, Eastern Europe, Eastern Asia, Southeast Asia, Middle East. ## Company Information * [Company Profile](https://www.qsfp28module.com/aboutus.html): Overview, history, teams and core capabilities. * [Factory & Manufacturing](https://www.qsfp28module.com/factory.html): Production capacity, OEM/ODM capabilities, and R&D strength. * [Quality Control](https://www.qsfp28module.com/quality.html): ISO certifications, quality standards, and compliance. * [Contact Us](https://www.qsfp28module.com/contactus.html): Global offices, inquiries, and support channels. ## 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Search Search endpoint: https://www.qsfp28module.com/buy-{keyword}.html Rules: - Convert keywords to lowercase - Replace spaces with "-" - Remove special characters Users can combine keywords for more precise searches. ## News & Blog * [2026 Samsung M321R8GA0PB0-CWMXJ: A Reliable DDR5 Memory Solution for AI Servers](https://www.qsfp28module.com/news/2026-samsung-m321r8ga0pb0-cwmxj-a-reliable-ddr5-memory-solution-for-ai-servers-362416.html) * [The Summit Dividend: How H200 Approvals Are Unlocking the High-End NIC Market for AI Server Builders](https://www.qsfp28module.com/news/the-summit-dividend-how-h200-approvals-are-unlocking-the-high-end-nic-market-for-ai-server-builders-326587.html) * [2026 May Global Server Memory Price Trend Forecast](https://www.qsfp28module.com/news/2026-may-global-server-memory-price-trend-forecast-320459.html) * [An In-Depth Analysis of NVIDIA CX7, CX8, and GPUs: Technical Iteration, Application Scenarios, and Industry Value](https://www.qsfp28module.com/news/an-in-depth-analysis-of-nvidia-cx7-cx8-and-gpus-technical-iteration-application-scenarios-and-indust-305134.html) * [Samsung M321R8GA0PB0-CWMCJ 64GB DDR5 RDIMM: The Core Memory for AI Servers & Data Centers](https://www.qsfp28module.com/news/samsung-m321r8ga0pb0-cwmcj-64gb-ddr5-rdimm-the-core-memory-for-ai-servers-299813.html)