{"product_id":"40gbase-lr4-qsfp-optical-transceiver-module-reliable-10km-link","title":"40GBASE-LR4 QSFP+ Optical Transceiver Module - Reliable 10km Link","description":"\u003cp\u003eOur review of the 40GBASE-LR4 QSFP+ Optical Transceiver Module finds it best suited for network engineers and IT teams who need a dependable 40G single-mode fiber link up to 10km. The module delivers consistent performance thanks to a built-in high performance chip and \u003cstrong\u003ereal time digital optical monitoring\u003c\/strong\u003e, which makes diagnostics straightforward in production switches. Tested in targeted switch devices and written with compatible EEPROM coding, it provides a practical, low-power (3.5W max) option for data center uplinks and aggregation switches where standards compliance matters.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40GBASE-LR4 QSFP+:\u003c\/strong\u003e Provides a standardized 40G optical interface for single-mode fiber networks up to 10km.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in high performance chip:\u003c\/strong\u003e Ensures stable signal processing and contributes to prolonged service life under normal operating conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Time Digital Optical Monitoring:\u003c\/strong\u003e Offers diagnostic visibility into optical power and link health to simplify troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power consumption:\u003c\/strong\u003e With a maximum power draw of 3.5W, it limits heat and reduces power needs in dense QSFP+ deployments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance:\u003c\/strong\u003e Hot-pluggable QSFP+ form factor and compliance with SFF-8436, QSFP MSA and 40GBASE-LR4 give broad interoperability with modern switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 CWDM lanes:\u003c\/strong\u003e MUX\/DEMUX design supporting up to 11.2Gbps per channel for consistent multi-lane transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe module is aimed at network administrators, data center operators, and integrators who require a \u003cstrong\u003e40G single-mode link\u003c\/strong\u003e for aggregation, spine-leaf interconnects, or uplinks between switches and routers. It is especially relevant where diagnostic monitoring and EEPROM compatibility with leading switch vendors are required for reliable deployment.\u003c\/p\u003e\n\u003cp\u003eSmaller home users or offices without single-mode infrastructure should look elsewhere for lower-speed or multimode transceivers, and operators needing extended commercial temperature ranges beyond 0 to 70C should consider industrial-grade alternatives.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandards-compliant QSFP+ form factor enables easy hot-pluggable installation in compatible switches.\u003c\/li\u003e\n\u003cli\u003eBuilt-in real time digital optical monitoring provides useful diagnostics for maintenance and troubleshooting.\u003c\/li\u003e\n\u003cli\u003eLow maximum power consumption of 3.5W reduces thermal load in dense deployments.\u003c\/li\u003e\n\u003cli\u003eCompatibility lab testing for EEPROM coding improves interoperability with major switch brands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCommercial temperature range of 0 to 70C may not suit extreme environmental deployments.\u003c\/li\u003e\n\u003cli\u003eDesigned for single-mode fiber only, so it is not suitable for multimode fiber links without appropriate conversion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eQSFP+ (hot pluggable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e40GBASE-LR4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e1310nm (4 CWDM lanes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLink Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 10km on single-mode fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Power Consumption\u003c\/td\u003e\n\u003ctd\u003e3.5W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0 to 70C (32 to 158F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eSFF-8436, QSFP MSA, ROHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor IT teams needing a standards-compliant \u003cstrong\u003e40GBASE-LR4\u003c\/strong\u003e transceiver with good diagnostic features and verified EEPROM compatibility, this module represents a pragmatic, cost-effective choice. Its low power draw and tested interoperability make it a solid option for data center uplinks and enterprise aggregation where environmental extremes are not a concern.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this transceiver hot-pluggable?\u003c\/strong\u003e\u003cbr\u003eYes, it uses the QSFP+ hot-pluggable form factor for easy insertion and removal from compatible ports.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fiber and distance does it support?\u003c\/strong\u003e\u003cbr\u003eIt is designed for single-mode fiber with LC duplex connectors and supports links up to 10km.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it support diagnostic monitoring?\u003c\/strong\u003e\u003cbr\u003eYes, it includes real time digital optical monitoring for optical power and link diagnostics.\u003c\/p\u003e","brand":"OPSTRAN","offers":[{"title":"Default Title","offer_id":48195371729115,"sku":"B09RZHB5B9","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/6187UgcrgqL._SL1500.jpg?v=1770211983","url":"https:\/\/gearmusthave.com\/products\/40gbase-lr4-qsfp-optical-transceiver-module-reliable-10km-link","provider":"GearMustHave","version":"1.0","type":"link"}