{"product_id":"40gbase-lr4-qsfp-optical-transceiver-module-4-pack-10km-lc","title":"40GBASE-LR4 QSFP+ Optical Transceiver Module 4 Pack - 10km LC","description":"\u003cp\u003eIn this review of the 40GBASE-LR4 QSFP+ Optical Transceiver Module 4 Pack, the bottom line is straightforward: networking teams who need reliable 40G links over single-mode fiber will find a cost-effective, tested option here. The modules are built for 10km LR4 links with a \u003cstrong\u003ehot-pluggable QSFP+\u003c\/strong\u003e form factor and include real-time digital optical monitoring, making them a practical choice for rack-level aggregation and data center uplinks where compatibility and diagnostics matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40GBASE-LR4 support:\u003c\/strong\u003e Provides a standardized 40G single-mode fiber link engineered for up to 10km reach, suitable for campus and data center interconnects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in DDM:\u003c\/strong\u003e Real time digital optical monitoring helps diagnose power and signal quality without external test equipment, speeding troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power draw:\u003c\/strong\u003e With a maximum power consumption of 3.5W per module, the design supports denser deployments while limiting thermal load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility testing:\u003c\/strong\u003e Modules are validated in targeted switch devices and programmed in a compatibility lab to meet EEPROM coding expectations of leading vendors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 CWDM lanes:\u003c\/strong\u003e The MUX\/DEMUX design and up to 11.2Gbps per channel bandwidth deliver the LR4 wavelength division multiplexing required for 40G performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliant:\u003c\/strong\u003e Conforms to IEEE 802.3ba, SFF-8436 and QSFP MSA for predictable interoperability with compliant hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis four-pack is aimed at network engineers and IT managers who need to upgrade or expand 40G uplinks without replacing switch hardware, and who value modules that have been tested for EEPROM compatibility and device-specific behavior. The included DDM is helpful for teams that will actively monitor link health and perform on-site diagnostics.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for crews needing extended temperature tolerance beyond the commercial range, or for short-reach multimode environments where SR optics would be the correct choice. Buyers should also confirm switch compatibility lists, although the product is designed to meet common vendor EEPROM requirements.\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\u003eTested compatibility and EEPROM programming reduce the chance of vendor rejection in many switch models.\u003c\/li\u003e\n\u003cli\u003eBuilt-in DDM provides live monitoring for optical power and diagnostics.\u003c\/li\u003e\n\u003cli\u003eCompact QSFP+ form factor with low 3.5W power consumption supports denser deployments.\u003c\/li\u003e\n\u003cli\u003eCompliant with major standards, aiding predictable interoperability.\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 (0 to 70C) may limit use in extreme environments.\u003c\/li\u003e\n\u003cli\u003eDesigned for single-mode LR4 links only; not suitable for multimode short-reach applications.\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+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003e40GBASE-LR4, IEEE 802.3ba\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\u003eReach\u003c\/td\u003e\n\u003ctd\u003eUp to 10km over SMF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax 3.5W\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\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eDuplex LC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 40GBASE-LR4 QSFP+ 4 pack is a pragmatic choice for IT teams that need reliable 10km single-mode 40G links with useful diagnostics and proven EEPROM compatibility. It offers strong value where commercial temperature operation and LR4 single-mode performance match deployment needs, providing straightforward integration into existing QSFP+-capable switches.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these modules work with major switch brands?\u003c\/strong\u003e\u003cbr\u003eThey are programmed and tested for EEPROM compatibility with targeted switch devices, but buyers should verify their switch model list to ensure full interoperability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fiber connector do they use?\u003c\/strong\u003e\u003cbr\u003eThe modules use a duplex LC connector compatible with single-mode fiber for LR4 links up to 10km.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I monitor optical power remotely?\u003c\/strong\u003e\u003cbr\u003eYes. Built-in digital optical monitoring provides real-time metrics for power and link diagnostics.\u003c\/p\u003e","brand":"OPSTRAN","offers":[{"title":"Default Title","offer_id":48245141897435,"sku":"B09ZQFNJZN","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71L-lH7cE3L._SL1500_d274a49a-fff5-409c-9eec-6ca94c9d2d21.jpg?v=1771101944","url":"https:\/\/gearmusthave.com\/products\/40gbase-lr4-qsfp-optical-transceiver-module-4-pack-10km-lc","provider":"GearMustHave","version":"1.0","type":"link"}