{"product_id":"qsfp-40g-for-cisco-qsfp-40g-sr4-40gbase-sr4-qsfp-transceiver-module","title":"QSFP 40G for Cisco QSFP-40G-SR4 40GBASE-SR4 QSFP+ Transceiver Module","description":"\u003cp\u003eIn this review the QSFP 40G for Cisco QSFP-40G-SR4 is judged on real deployment value for networking engineers and data center teams. It is aimed at anyone needing a cost-conscious, standards-compatible 40Gbps short-range optics option for multimode fiber. The single biggest reason to buy is straightforward: it delivers native \u003cstrong\u003e40Gbps 40GBASE-SR4\u003c\/strong\u003e connectivity with an MTP\/MPO interface and DOM support, making it a practical replacement or spare for Cisco-compatible 40G links up to 150m.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40Gbps QSFP+ form factor:\u003c\/strong\u003e Provides full 40 Gigabit Ethernet throughput for aggregation or server uplinks without changing switch line cards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e850nm multimode optics:\u003c\/strong\u003e Uses VCSEL transmitters tuned for common multimode fiber runs, giving predictable performance to 150m.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTP\/MPO connector:\u003c\/strong\u003e Simplifies ribbon fiber terminations and supports breakout to four 10G channels when required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDOM and CDR support:\u003c\/strong\u003e Digital optical monitoring and clock-data recovery enable basic remote diagnostics and stable channel performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-pluggable:\u003c\/strong\u003e Allows replacing or adding modules without powering down equipment, reducing maintenance windows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliant:\u003c\/strong\u003e Built to the QSFP+ MSA and IEEE 802.3ba 40GBASE-SR4 profiles so it interoperates with many Cisco-class systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis transceiver suits network administrators and data center technicians who need a budget-friendly, compatible 40G short-reach module for multimode fiber links and breakout scenarios. It fits well where teams require DOM telemetry and standard MTP\/MPO connectivity for fiber panels and modular patching.\u003c\/p\u003e\n\u003cp\u003eThose looking for very long-reach optics, single-mode links, or specialized SFP form factors should look elsewhere; this module is optimized for \u003cstrong\u003emultimode 40GBASE-SR4\u003c\/strong\u003e runs up to 150m rather than long-haul or CWDM\/DWDM applications.\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\u003eCost-effective alternative for 40G multimode links while retaining IEEE and MSA compatibility.\u003c\/li\u003e\n\u003cli\u003eHot-pluggable and supports DOM for simple remote monitoring of power and temperature.\u003c\/li\u003e\n\u003cli\u003eMTP\/MPO interface and breakout capability to 4x10G make it flexible for mixed 10G\/40G environments.\u003c\/li\u003e\n\u003cli\u003eIndustrial temperature rating and CDR support help maintain stable operation in common rack environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimited to multimode 850nm, so it is not suitable for single-mode or long-reach requirements beyond 150m.\u003c\/li\u003e\n\u003cli\u003eBranding and vendor listing indicate generic sourcing, so buyers wanting OEM labeling may need custom ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Type\u003c\/td\u003e\n\u003ctd\u003eQSFP+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Data Rate\u003c\/td\u003e\n\u003ctd\u003e40Gbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e850nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Cable Distance\u003c\/td\u003e\n\u003ctd\u003e150m (multimode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eMTP\/MPO, hot-pluggable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDOM Support\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Components\u003c\/td\u003e\n\u003ctd\u003eVCSEL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe QSFP 40G QSFP-40G-SR4 is a practical, affordable choice for teams needing standards-compliant 40G multimode connectivity and simple breakout to 10G. It delivers essential features like DOM, CDR, and hot-plug convenience at a strong value for short-reach links, though organizations needing single-mode or extended distances should select a different transceiver.\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 designed to be compatible with Cisco equipment supporting QSFP-40G-SR4 profiles and IEEE 802.3ba 40GBASE-SR4.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fiber and connector type does it use?\u003c\/strong\u003e\u003cbr\u003eIt uses multimode fiber with an MTP\/MPO connector and VCSEL optics at 850nm, rated to 150m.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it support remote monitoring?\u003c\/strong\u003e\u003cbr\u003eYes, the module supports DOM so you can read transmit and receive power, temperature, and related diagnostics remotely.\u003c\/p\u003e","brand":"China","offers":[{"title":"Default Title","offer_id":48256300843227,"sku":"B081319MQQ","price":36.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/514CEL71HTL._AC_SL1000.jpg?v=1778238659","url":"https:\/\/gearmusthave.com\/products\/qsfp-40g-for-cisco-qsfp-40g-sr4-40gbase-sr4-qsfp-transceiver-module","provider":"GearMustHave","version":"1.0","type":"link"}