{"product_id":"100g-qsfp28-dac-cable-cr4-qsfp28-to-qsfp28-passive-3m-reliable","title":"100G QSFP28 DAC Cable CR4 QSFP28 to QSFP28 Passive 3M - Reliable","description":"\u003cp\u003eIn this review of the 100G QSFP28 DAC Cable CR4, the bottom line is straightforward: this passive QSFP28-to-QSFP28 twinax cable is aimed at network engineers and data center operators who need a cost-effective, short-reach way to link 100G ports. The cable's single biggest reason to buy is compatibility and quality control - it is built to match Juniper 100G switches and every unit is TDR and VNA tested plus individually validated on switches before shipment, so it removes much of the uncertainty common with generic DACs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100GBASE-CR4 compatibility:\u003c\/strong\u003e Provides a straightforward 100-Gigabit copper link between QSFP28 ports for connections within racks and to adjacent racks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJuniper compatible:\u003c\/strong\u003e Designed to be 100% compatible with Juniper 100G Ethernet switches and to replace common factory 3m DAC part numbers for easy swaps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive twinax construction:\u003c\/strong\u003e Requires no additional power, offering a low-cost, low-complexity solution for very short links in dense rack environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTested for signal integrity:\u003c\/strong\u003e Each cable passes Time Domain Reflectometry (TDR) and Vector Network Analyzer (VNA) tests in the vendor lab to ensure reliable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividual switch validation:\u003c\/strong\u003e Every DAC cable is tested on switches before delivery, reducing the risk of deployment issues in production networks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftercare:\u003c\/strong\u003e Ships with a 30-day free return window, five-year warranty, and lifetime technical support for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe cable is best for data center technicians, network administrators, and systems integrators who need a dependable, short-length 100G copper interconnect that is known to work with Juniper equipment. It is ideal for top-of-rack and adjacent-rack links where optical solutions would be overkill and where cost and power savings matter.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for long-reach connections or situations that require active optical cables; buyers needing runs beyond a few meters or fiber-based flexibility should look at active optical or modular transceiver options instead.\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\u003eDirect compatibility with Juniper 100G switches simplifies deployment and replacements.\u003c\/li\u003e\n\u003cli\u003eIndividual TDR and VNA testing plus switch validation reduces the chance of DOA units.\u003c\/li\u003e\n\u003cli\u003ePassive design means no extra power draw and lower cost compared with active optical cables.\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 short links; not suitable for runs longer than a few meters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003ePassive QSFP28 to QSFP28 twinax cable (DAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed\u003c\/td\u003e\n\u003ctd\u003e100Gb\/s (100GBASE-CR4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e3 meter (9.9 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003eAWG30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eCompatible with Juniper 100G Ethernet switches, replacement for common 3m DAC parts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTesting\u003c\/td\u003e\n\u003ctd\u003eTDR \u0026amp; VNA tested; each cable validated on switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e30-day free return, 5-year warranty, lifetime tech support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor short-reach 100G interconnects inside racks or between adjacent racks, this QSFP28 passive DAC is a pragmatic, value-oriented choice because it pairs broad Juniper compatibility with lab-grade testing and per-unit validation. Organizations that prioritize predictable, low-cost connectivity and vendor-grade assurance will find it a sensible buy.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable compatible with Juniper 100G switches?\u003c\/strong\u003e\u003cbr\u003eYes, it is built to be 100% compatible with Juniper 100G Ethernet switches and intended as a replacement for common 3m DAC parts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow far can this passive DAC run reliably?\u003c\/strong\u003e\u003cbr\u003eIt is designed for very short links; the 3-meter length is suitable for within-rack and adjacent-rack connections but not for longer-distance runs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat kind of testing and warranty is included?\u003c\/strong\u003e\u003cbr\u003eEach cable undergoes TDR and VNA lab testing and is individually tested on switches; it ships with a 30-day return window, five-year warranty, and lifetime technical support.\u003c\/p\u003e","brand":"Macroreer","offers":[{"title":"Default Title","offer_id":48198612615387,"sku":"B07Y2SN345","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71SuxgTEINL._SL1500.jpg?v=1770310331","url":"https:\/\/gearmusthave.com\/products\/100g-qsfp28-dac-cable-cr4-qsfp28-to-qsfp28-passive-3m-reliable","provider":"GearMustHave","version":"1.0","type":"link"}