{"product_id":"d-link-dem-330t-dem-330r-1-25g-bidi-sfp-module-10-20km-compatible","title":"D-Link DEM-330T\/DEM-330R 1.25G BIDI SFP Module - 10-20KM Compatible","description":"\u003cp\u003eIn this review the Jeirdus-compatible SFP BIDI transceiver is presented for network engineers and small data center operators who need a simple, cost-effective way to extend Gigabit links over single-fiber runs. The bottom line: this module delivers the core capability expected from a replacement 1.25Gb\/s bidirectional SFP - single LC simplex operation with TX\/RX wavelengths of 1310\/1550nm and a reach up to 20km - and it is useful where vendor compatibility and tested reliability matter. Our review found it straightforward to deploy and clearly aimed at users replacing D-Link DEM-330T\/DEM-330R parts or upgrading mixed-brand networks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Built to be compatible with D-LINK DEM-330T and DEM-330R modules, making it a direct replacement for existing infrastructure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBidirectional Single-Fiber:\u003c\/strong\u003e Uses 1000BASE-BX-U and 1000BASE-BX-D bidirectional SFP optics to carry transmit and receive on a single LC simplex strand, simplifying fiber runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e Rated for operation up to 10-20km over single-mode fiber, suitable for campus links and remote closet connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInteroperability:\u003c\/strong\u003e Jeirdus reports compatibility with Cisco and other brands through a compatibility lab that meets coding requirements for multiple switch and router vendors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality and Warranty:\u003c\/strong\u003e Each transceiver is individually tested before delivery and is supplied with CE and FCC compliance plus a three year replacement and lifetime warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Details:\u003c\/strong\u003e Operates at 1.25Gb\/s with wavelength pairs TX1310nm\/RX1550nm or TX1550nm\/RX1310nm for upstream and downstream configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe module suits network administrators who need a drop-in replacement for D-Link DEM-330T or DEM-330R SFPs, or integrators working with mixed-brand environments that include Cisco equipment. It is a practical option for campus backbone links, building-to-building fiber runs, and point-to-point connections where single-fiber simplicity and a 10-20km reach are required.\u003c\/p\u003e\u003cp\u003eIt is less appropriate for users who need multi-rate fiber optics beyond 1.25Gb\/s, multimode fiber environments, or specialized features such as DWDM channelized systems. Organizations requiring vendor-certified optics from the original manufacturer should evaluate their policy before switching to third-party modules.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect compatibility with D-LINK DEM-330T\/DEM-330R makes swap-outs simple and predictable.\u003c\/li\u003e\n\u003cli\u003eSingle LC bidirectional design reduces fiber cabling complexity for long runs up to 20km.\u003c\/li\u003e\n\u003cli\u003eEach unit is individually tested and backed by CE, FCC compliance and a three year replacement plus lifetime warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLimited to 1.25Gb\/s operation, so it will not future-proof links that will move to 10Gb\/s or higher.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003eSFP 1.25Gb\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Type\u003c\/td\u003e\n\u003ctd\u003eSingle-mode, simplex LC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003eTX1310nm\/RX1550nm or TX1550nm\/RX1310nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003e1000BASE-BX-U and 1000BASE-BX-D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistance\u003c\/td\u003e\n\u003ctd\u003eUp to 10-20km\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eD-LINK DEM-330T\/DEM-330R and compatible with Cisco\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\/Warranty\u003c\/td\u003e\n\u003ctd\u003eCE, FCC; 3 year replacement and lifetime warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Jeirdus-compatible DEM-330T\/DEM-330R BIDI SFP is a solid, cost-effective replacement for networks that require single-fiber Gigabit links and vendor interoperability. It is good value for administrators who need reliable, tested replacement optics with a clear warranty, but it is not intended as a future-proof upgrade path beyond 1.25Gb\/s.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this module work in Cisco switches?\u003c\/strong\u003e\u003cbr\u003eYes. Jeirdus states the module is compatible with Cisco and other brands after compatibility lab testing to meet coding requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fiber connector does it use?\u003c\/strong\u003e\u003cbr\u003eIt uses a single LC simplex connector for bidirectional single-fiber operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow far can the transceiver reach?\u003c\/strong\u003e\u003cbr\u003eIt is rated to operate up to 10-20km over single-mode fiber depending on link conditions.\u003c\/p\u003e","brand":"Jeirdus","offers":[{"title":"Default Title","offer_id":48185215320283,"sku":"B07D5F2HZM","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51jXZElYNkL._AC.jpg?v=1769445738","url":"https:\/\/gearmusthave.com\/products\/d-link-dem-330t-dem-330r-1-25g-bidi-sfp-module-10-20km-compatible","provider":"GearMustHave","version":"1.0","type":"link"}