{"product_id":"40gbase-lr4-qsfp-optical-transceiver-module-4-pack-10km-link","title":"40GBASE-LR4 QSFP+ Optical Transceiver Module 4 Pack - 10km Link","description":"\u003cp\u003eOur review of this 40GBASE-LR4 QSFP+ Optical Transceiver Module 4 Pack finds it best suited for network engineers and IT teams who need a cost-effective, hot-pluggable 40G uplink for single-mode fiber runs up to 10km. The key reason to buy is straightforward: these modules combine \u003cstrong\u003e40GBASE-LR4\u003c\/strong\u003e standard compliance with built-in digital monitoring and tested compatibility procedures, which together make installation and ongoing diagnostics simpler than many generic transceivers. The review focuses on real-world deployment characteristics, thermal and power considerations, and how well the modules integrate with modern switches when EEPROM coding is required.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40GBASE-LR4 optical interface:\u003c\/strong\u003e Provides a standard-compliant 40G connection over single-mode fiber for links up to 10km using duplex LC connectors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in high performance chip:\u003c\/strong\u003e Keeps signal integrity and supports the module's \u003cstrong\u003emax power consumption of 3.5W\u003c\/strong\u003e, which helps prolong service life under normal operating conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Time Digital Optical Monitoring:\u003c\/strong\u003e Offers live diagnostics of optical power and temperature to simplify fault finding and maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility lab tested:\u003c\/strong\u003e EEPROM coding and writing are handled to match target switch devices, improving interoperability with a variety of networking equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 CWDM lanes MUX\/DEMUX:\u003c\/strong\u003e Enables four 10G channels (up to 11.2Gbps per channel) inside the QSFP+ form factor for efficient lane aggregation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliant form factor and standards:\u003c\/strong\u003e Hot pluggable QSFP+ design meeting SFF-8436 and IEEE 802.3ba ensures physical and electrical compatibility with common 40G ports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis 4 pack is aimed at IT teams upgrading data center uplinks, service providers, or campus network operators who need multiple identical 40G transceivers for predictable performance and easier inventory management. The built-in monitoring and lab-verified EEPROM coding make it attractive for environments where compatibility and diagnostics matter.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for users who need extended temperature ranges beyond commercial operation or who require vendor-branded optical modules with official vendor warranties. Also, buyers needing multimode fiber support or distances shorter than typical LR4 deployments should consider other optical types.\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\u003eComprehensive \u003cstrong\u003edigital optical monitoring\u003c\/strong\u003e provides live diagnostic metrics for reliable maintenance.\u003c\/li\u003e\n\u003cli\u003eEEPROM compatibility testing reduces integration issues with a variety of switch vendors and models.\u003c\/li\u003e\n\u003cli\u003eHot pluggable QSFP+ form factor and standards compliance simplifies installation in 40G ports.\u003c\/li\u003e\n\u003cli\u003e4 pack option helps standardize multiple uplinks and saves procurement time.\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 be limiting for extreme environment installations.\u003c\/li\u003e\n\u003cli\u003eNo vendor-specific warranty details provided in the product information, so buyers should confirm support expectations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\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\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eQSFP+ (SFF-8436), hot pluggable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength \/ Reach\u003c\/td\u003e\n\u003ctd\u003e1310nm, up to 10km on 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\u003eCommercial 0 to 70C (32 to 158F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e4 CWDM lanes MUX\/DEMUX, up to 11.2Gbps per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMonitoring\u003c\/td\u003e\n\u003ctd\u003eBuilt-in Real Time Digital Optical Monitoring (DDM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 4 pack of 40GBASE-LR4 QSFP+ modules is a practical choice for teams that need consistent, standard-compliant 40G links with strong diagnostics and tested EEPROM compatibility. It delivers good value when deploying multiple 10km single-mode uplinks and when monitoring and interoperability are priorities.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these modules hot pluggable?\u003c\/strong\u003e\u003cbr\u003eYes. The units use the QSFP+ hot pluggable form factor compliant with SFF-8436.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they support digital optical monitoring?\u003c\/strong\u003e\u003cbr\u003eYes. Each module includes Real Time Digital Optical Monitoring for optical power, temperature and related diagnostics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range do they support?\u003c\/strong\u003e\u003cbr\u003eThey are rated for commercial operation from 0 to 70C (32 to 158F).\u003c\/p\u003e","brand":"OPSTRAN","offers":[{"title":"Default Title","offer_id":48239316730075,"sku":"B09ZQFQ98T","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71L-lH7cE3L._SL1500.jpg?v=1770967146","url":"https:\/\/gearmusthave.com\/products\/40gbase-lr4-qsfp-optical-transceiver-module-4-pack-10km-link","provider":"GearMustHave","version":"1.0","type":"link"}