{"product_id":"100g-qsfp28-cwdm4-optical-transceiver-module-reliable-2km-cwdm4","title":"100G QSFP28 CWDM4 Optical Transceiver Module - Reliable 2km CWDM4","description":"\u003cp\u003eOur review of the 100G QSFP28 CWDM4 Optical Transceiver Module finds it best suited to network engineers and data center teams who need a compact, hot-pluggable 100G link for short single-mode runs. The single biggest reason to buy is the combination of standards compliance and built-in monitoring: this module supports \u003cstrong\u003e100GBASE-CWDM4\u003c\/strong\u003e with ITU-T alignment and offers real-time digital optical monitoring (DOM) so technicians can verify link health without extra test gear. It is a pragmatic choice where 2km single-mode reach, LC connectivity and 100G-to-4x25G breakout are required.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100GBASE-CWDM4 support:\u003c\/strong\u003e Provides standardized 100G transport across four CWDM wavelengths for predictable interoperability with compliant switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 km single-mode reach:\u003c\/strong\u003e Covers common campus and data center interconnect spans without the cost of long-range optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-pluggable QSFP28 form factor:\u003c\/strong\u003e Lets engineers swap or upgrade modules without powering down equipment, minimizing downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in DOM:\u003c\/strong\u003e Real-time digital optical monitoring enables live diagnostics of transmit power, receive power and temperature to simplify troubleshooting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100G to 4x25G breakout:\u003c\/strong\u003e Supports breakout applications when converting a 100G port into four 25G lanes for flexible deployment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power and commercial temp:\u003c\/strong\u003e 3.5W power consumption and 0 to 70C operating range for typical indoor networking environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis module is aimed at IT professionals operating modern top-of-rack and aggregation switches that support QSFP28 MSA optics and require \u003cstrong\u003e100G single-mode connectivity\u003c\/strong\u003e over short campus or data center links. It is particularly useful where breakout to 4x25G is needed for server connectivity or for staged upgrades from 25G to 100G.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include sites that need extended temperature ranges, multimode fiber links, or distances beyond 2 km; in those cases consider long-reach or multimode-specific transceivers designed for those environments.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStandards compliant with IEEE and ITU-T guidance for reliable interoperability.\u003c\/li\u003e\n\u003cli\u003eHot-pluggable QSFP28 package and support for 100G to 4x25G breakout increase deployment flexibility.\u003c\/li\u003e\n\u003cli\u003eBuilt-in DOM gives practical, on-demand diagnostic data to reduce troubleshooting time.\u003c\/li\u003e\n\u003cli\u003eLow power draw (about 3.5W) helps limit cooling and power impacts in dense racks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLimited to 2 km single-mode reach, so not suitable for longer metropolitan or long-haul links.\u003c\/li\u003e\n\u003cli\u003eCommercial temperature range only, which may be restrictive for outdoor or harsh environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm factor\u003c\/td\u003e\n\u003ctd\u003eQSFP28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003e100GBASE-CWDM4, IEEE 802.3ba\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelengths\u003c\/td\u003e\n\u003ctd\u003e1271 nm, 1291 nm, 1311 nm, 1331 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum reach\u003c\/td\u003e\n\u003ctd\u003e2 km (single-mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eLC (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\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e0 to 70C (32 to 158F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eFor data center and campus networks that need an affordable, standards-based 100G single-mode module with diagnostic visibility, this QSFP28 CWDM4 is a practical choice. Its hot-pluggable design, DOM and breakout support deliver flexibility and maintainability, making it good value for installations within the 2 km reach and normal indoor temperature ranges.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this module break out to four 25G ports?\u003c\/strong\u003e\u003cbr\u003eYes. It supports 100G to 4x25G breakout applications when used with compatible switch hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it include real-time monitoring for diagnostics?\u003c\/strong\u003e\u003cbr\u003eYes. The module has built-in DOM functionality for transmit\/receive power and other status metrics.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fiber and connector type does it use?\u003c\/strong\u003e\u003cbr\u003eIt uses single-mode fiber with duplex LC connectors and operates across four CWDM wavelengths.\u003c\/p\u003e","brand":"fiber mall","offers":[{"title":"Default Title","offer_id":48638859706587,"sku":"B0DQ43CP9J","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61u4XLs6eML._SL1500_3053407d-980d-4f56-858a-41338dd6f8df.jpg?v=1778695342","url":"https:\/\/gearmusthave.com\/products\/100g-qsfp28-cwdm4-optical-transceiver-module-reliable-2km-cwdm4","provider":"GearMustHave","version":"1.0","type":"link"}