{"product_id":"100gbase-cwdm4-qsfp28-1310nm-2km-module-compatible-for-cisco","title":"100GBASE-CWDM4 QSFP28 1310nm 2km Module - Compatible for Cisco","description":"\u003cp\u003eIn this review of the 100GBASE-CWDM4 QSFP28 1310nm 2km module, the bottom line is straightforward: network engineers and data center technicians who need a compact, standards-compatible 100 Gigabit optical transceiver for single mode fiber will find it a practical, cost-effective choice. The reviewer found the module excels at providing reliable 100GbE links up to 2km with forward error correction (FEC) and integrated digital diagnostics, making it useful for campus aggregation and short metro links where Cisco compatibility and predictable behavior matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works as a replacement for Cisco QSFP-100G-CWDM4-S to provide 100 Gigabit Ethernet interoperability without vendor lock-in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh per-lane rate:\u003c\/strong\u003e Supports an aggregate 103.1Gb\/s with each lane running at about 25.78Gb\/s, enabling full QSFP28 performance for high-throughput links.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2km SMF range:\u003c\/strong\u003e Designed for up to 2km transmission over single mode fiber with FEC, suitable for campus backbones and short metro circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated diagnostics:\u003c\/strong\u003e I2C interface with Digital Diagnostic Monitoring gives real-time telemetry on optical power and temperature for easier troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry compliance:\u003c\/strong\u003e Conforms to IEEE 802.3ba\/802.3bm and relevant MSA and SFF specs, easing deployment in mixed-vendor environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power footprint:\u003c\/strong\u003e Single +3.3V supply and modest maximum power consumption around 3.5W keep heat and rack power manageable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis module is aimed at IT professionals operating Cisco-compatible switches and routers who need a plug-in 100G CWDM4 transceiver for short single mode links. It suits network refreshes, cross-connects between data halls, and service provider handoffs where compliance with the 100G CWDM4 MSA and IEEE standards is required.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include teams needing longer haul DWDM optics, multimode fiber systems, or vendor-branded modules with direct manufacturer support contracts. It is not intended for links beyond the specified 2km single mode range or for environments requiring extended temperature ranges below 0C.\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-based QSFP28 form factor with duplex LC connector supports broad switch compatibility.\u003c\/li\u003e\n\u003cli\u003eSupports FEC and 2km SMF range, making it practical for many campus and metro links.\u003c\/li\u003e\n\u003cli\u003eIntegrated Digital Diagnostic Monitoring via I2C helps with proactive maintenance and troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperating case temperature is 0 to +70C, so it may not be suitable for extreme temperature environments.\u003c\/li\u003e\n\u003cli\u003eNot designed for distances beyond 2km, so longer metro or long-haul applications require different optics.\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\u003eQSFP28 MSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e1310nm (CWDM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Reach\u003c\/td\u003e\n\u003ctd\u003eUp to 2km on Single Mode Fiber with FEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eSingle +3.3V\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\u003eOperating Case Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +70C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocols \u0026amp; Specs\u003c\/td\u003e\n\u003ctd\u003eIEEE 802.3ba, IEEE 802.3bm, 100G CWDM4 MSA, SFF-8636\/8665\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 100GBASE-CWDM4 QSFP28 1310nm 2km module is a sensible, standards-compliant option for teams needing a Cisco-compatible 100GbE transceiver for short single mode links. It delivers the expected QSFP28 performance, useful diagnostics, and conservative power draw, making it good value for data center and campus deployments that fit the 2km distance and 0 to +70C operating range.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this module compatible with Cisco switches?\u003c\/strong\u003e\u003cbr\u003eYes, it is sold as compatible for Cisco QSFP-100G-CWDM4-S and implements the QSFP28 MSA and related SFF specs to work with many Cisco platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum supported distance?\u003c\/strong\u003e\u003cbr\u003eThe transceiver supports up to 2km over single mode fiber when used with FEC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it provide diagnostic monitoring?\u003c\/strong\u003e\u003cbr\u003eYes, it includes an I2C interface with integrated Digital Diagnostic Monitoring for real-time telemetry.\u003c\/p\u003e","brand":"QSFPTEK","offers":[{"title":"Default Title","offer_id":48189440884955,"sku":"B0B45HQ3TW","price":168.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51qmgJ1FXIL._AC_SL1500.jpg?v=1769399129","url":"https:\/\/gearmusthave.com\/products\/100gbase-cwdm4-qsfp28-1310nm-2km-module-compatible-for-cisco","provider":"GearMustHave","version":"1.0","type":"link"}