{"product_id":"100g-qsfp28-cwdm4-optical-transceiver-module-reliable-2km","title":"100G QSFP28 CWDM4 Optical Transceiver Module - Reliable 2km","description":"\u003cp\u003eIn this review the focus is on a practical 100G QSFP28 CWDM4 optical transceiver module that targets network engineers and data center teams needing a cost-effective single-mode 100G link. The reviewer found it delivers the expected 100GBASE-CWDM4 performance over up to 2km with a standard LC connector and hot-pluggable QSFP28 form factor. For anyone deploying 100G to 4x25G breakout applications or replacing modules in mixed-vendor environments, this module stands out for compatibility, low power draw and a sensible commercial temperature range.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e100GBASE-CWDM4:\u003c\/strong\u003e Provides four wavelengths (1271nm, 1291nm, 1311nm, 1331nm) for reliable 100G single-mode links up to 2km, minimizing fiber changes.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eQSFP28 MSA Form Factor:\u003c\/strong\u003e Hot-pluggable design simplifies installation and maintenance in rack environments without powering down switches or servers.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Typical power around 3.5W helps keep module heat and rack power budgets manageable for dense installations.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDOM Support:\u003c\/strong\u003e Digital optical monitoring lets technicians check real-time optical parameters for faster troubleshooting and preventative maintenance.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eBreakout Capability:\u003c\/strong\u003e Supports 100G to 4x25G breakout use cases, offering flexibility when connecting to 25G-capable equipment.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStandards Compliance:\u003c\/strong\u003e Built to IEEE 802.3ba and ITU-T G.694.2 conventions for predictable interoperability with other CWDM4 equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis module is best for network administrators and systems integrators building or expanding 100G single-mode links within campuses or data centers that require up to 2km reach. It is particularly useful when a low-power, hot-pluggable transceiver with DOM and breakout support is needed to simplify mixed-rate deployments.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing multimode optics, longer than 2km single-mode reach, or modules specified for extended temperature ranges beyond the commercial 0 to 70C window. If you require vendor-specific firmware identification guarantees, verify compatibility with your switch vendor first.\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\u003eSupports CWDM4 wavelengths and 2km single-mode reach, enabling straightforward 100G links over existing fiber.\u003c\/li\u003e\n \u003cli\u003eHot-pluggable QSFP28 design with low 3.5W power consumption reduces downtime and thermal load in dense racks.\u003c\/li\u003e\n \u003cli\u003eDOM support and standards compliance aid monitoring and interoperability across equipment from different vendors.\u003c\/li\u003e\n \u003cli\u003eBreakout to 4x25G adds practical flexibility for mixed-rate networks.\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 rating (0 to 70C) may not suit outdoor enclosures or harsh environments.\u003c\/li\u003e\n \u003cli\u003eNot intended for multimode or longer than 2km applications, limiting use to single-mode short reach links.\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\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e100GBASE-CWDM4\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eWavelengths\u003c\/td\u003e\n\u003ctd\u003e1271nm, 1291nm, 1311nm, 1331nm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMaximum Reach\u003c\/td\u003e\n\u003ctd\u003e2km (single-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eLC, full-duplex\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eApproximately 3.5W\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 70C (32 to 158F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 100G QSFP28 CWDM4 transceiver is a practical choice for data center and enterprise teams needing a reliable 100G single-mode link with breakout support and low power consumption. It represents good value when the deployment fits within the 2km reach and commercial temperature limits, offering straightforward interoperability and monitoring features that reduce maintenance time.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module support 100G to 4x25G breakout?\u003c\/strong\u003e\u003cbr\u003eYes, the transceiver supports 100G to 4x25G breakout applications, enabling connections to 25G-capable ports where needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat form factor and connector does it use?\u003c\/strong\u003e\u003cbr\u003eIt uses a QSFP28 MSA hot-pluggable form factor with LC full-duplex connectors for single-mode fiber.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the operating temperature range?\u003c\/strong\u003e\u003cbr\u003eThe module is rated for a commercial operating range of 0 to 70C (32 to 158F), suitable for typical indoor rack environments.\u003c\/p\u003e","brand":"fiber mall","offers":[{"title":"Default Title","offer_id":48608989282523,"sku":"B08LQ7FWYX","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61u4XLs6eML._SL1500.jpg?v=1778413952","url":"https:\/\/gearmusthave.com\/products\/100g-qsfp28-cwdm4-optical-transceiver-module-reliable-2km","provider":"GearMustHave","version":"1.0","type":"link"}