{"product_id":"100gbase-er4-qsfp28-module-1310nm-40km-lc-reliable-long-reach-100g","title":"100GBASE-ER4 QSFP28 Module 1310nm 40km LC - Reliable Long-Reach 100G","description":"\u003cp\u003eIn this review the QSFPTEK 100GBASE-ER4 QSFP28 module is evaluated for network engineers and data center operators who need a reliable 100G link across single-mode fiber. The bottom line is that this transceiver delivers practical long-reach performance and monitoring features in a compact QSFP form factor, making it a solid choice for rack-to-rack and client-side 100G interconnections where up to 40km reach and low power draw matter. It is not an exotic optics solution, but it is straightforward to deploy and maintain.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-channel QSFP28:\u003c\/strong\u003e Packs four full-duplex lanes into a single QSFP form factor to deliver up to 103.1Gb\/s aggregate throughput for high-density 100G links.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40km reach with FEC:\u003c\/strong\u003e Supports up to 40km on G.652 single-mode fiber with FEC enabled, enabling long-reach links between data center sites.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1310nm LAN-WDM transmitters:\u003c\/strong\u003e Four DFB-based LAN-WDM cooled transmitters provide stable optical performance across all channels for consistent signaling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated monitoring (DDM):\u003c\/strong\u003e Digital diagnostics allow real-time monitoring of optical power, temperature, and other parameters to simplify troubleshooting and maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power and wide temperature range:\u003c\/strong\u003e Operates from 0 to 70C with a single 3.3V supply and consumes under 3.8W, which helps control operating costs in dense deployments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-pluggable convenience:\u003c\/strong\u003e The QSFP form factor and plug-and-play design make it easy to swap or upgrade transceivers without lengthy downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe module is aimed at network engineers running medium to large data centers, colocation facilities, or enterprise campus links that require 100G connectivity over single-mode fiber up to tens of kilometers. It is especially suitable for rack-to-rack aggregation and client-side interconnections that need a low-power, monitored transceiver.\u003c\/p\u003e\n\n\u003cp\u003eThose who should look elsewhere include teams that need extreme longer than 40km reach without FEC, custom wavelength planning beyond LAN-WDM, or specialized optics with novel connector formats - in those cases other ZR-class or DWDM solutions may be a better fit.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers 100G connectivity in a compact QSFP28 module with low power consumption under 3.8W.\u003c\/li\u003e\n\u003cli\u003eSupports up to 40km on standard G.652 SMF with FEC, covering most metro and inter-data-center links.\u003c\/li\u003e\n\u003cli\u003eBuilt-in DDM simplifies monitoring and proactive maintenance of optical links.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature and hot-pluggable design make it practical for dense installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWithout FEC the practical reach is limited to around 30km, so very long spans may require alternative optics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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\u003eData rate\u003c\/td\u003e\n\u003ctd\u003eUp to 103.1Gb\/s aggregate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e1310nm LAN-WDM (4 channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReach\u003c\/td\u003e\n\u003ctd\u003eUp to 30km without FEC; up to 40km with FEC on G.652 SMF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eDuplex LC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eSingle 3.3V, \u0026lt;3.8W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating case temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 70C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe QSFPTEK 100GBASE-ER4 QSFP28 module is a pragmatic choice for teams that need dependable 100G links over single-mode fiber with built-in monitoring and low power draw. It offers strong value for rack-to-rack and client-side interconnections up to 40km with FEC, and its hot-pluggable QSFP form factor keeps deployments and replacements simple.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module support monitoring?\u003c\/strong\u003e\u003cbr\u003eYes. It includes DDM support so administrators can monitor optical power, temperature, and other diagnostics in real time.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat reach can I expect on standard SMF?\u003c\/strong\u003e\u003cbr\u003eExpect up to 30km without FEC and up to 40km with FEC on G.652 single-mode fiber according to the product specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it compatible with common 100G QSFP ports?\u003c\/strong\u003e\u003cbr\u003eYes. It uses the QSFP28 form factor and is designed for standard QSFP-compatible 100G ports and typical client-side interconnections.\u003c\/p\u003e","brand":"QSFPTEK","offers":[{"title":"Default Title","offer_id":48233946480859,"sku":"B0915Y3W8V","price":899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61fbk_RPa5S._AC_SL1500.jpg?v=1770915121","url":"https:\/\/gearmusthave.com\/products\/100gbase-er4-qsfp28-module-1310nm-40km-lc-reliable-long-reach-100g","provider":"GearMustHave","version":"1.0","type":"link"}