{"product_id":"d-link-dem-s2801sr","title":"D-Link DEM-S2801SR 25GbE Multi-Mode SFP28 Transceiver","description":"\u003cdiv id=\"ace-d-link-dem-s2801sr-copy\"\u003e\n\u003cstyle\u003e\n#ace-d-link-dem-s2801sr-copy { font-family: inherit; color: inherit; }\n\/* Reuses the current ACE calculator FAQ disclosure treatment. Scope: this product FAQ only. *\/\n#ace-d-link-dem-s2801sr-copy .ace-article-faq { --ace-family-ink: #21352b; --ace-family-muted: #5b6961; --ace-family-line: #d3d9d5; --ace-family-soft: #f4f7f4; margin: 24px 0; padding: 0; background: transparent; font-family: inherit; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details.ace-form-disclosure { margin: 0 0 12px; padding: 0; border: 1px solid var(--ace-family-line); border-radius: 12px; background: #fff; overflow: visible; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details \u003e summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 56px; margin: 0; padding: 16px 20px; border-radius: 12px; background: var(--ace-family-soft); color: var(--ace-family-ink); font: inherit; font-size: 16px; font-weight: 600; line-height: 1.4; list-style: none; cursor: pointer; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq summary::-webkit-details-marker { display: none; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq summary::marker { content: ''; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq summary::before, #ace-d-link-dem-s2801sr-copy .ace-article-faq summary::after { content: none; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details[open] \u003e summary { border-radius: 12px 12px 0 0; border-bottom: 0; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq h3.ace-form-title { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; min-width: 0; margin: 0 !important; padding: 0; color: var(--ace-family-ink); font-family: inherit; font-size: 16px; font-weight: 600; line-height: 1.35; letter-spacing: normal; text-transform: none; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-title-text { display: flex; flex: 1 1 auto; min-width: 0; margin: 0; overflow-wrap: anywhere; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-toggle { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; margin: 0 0 0 auto; padding: 0; color: #55605a; font-size: 12px; line-height: 1.4; font-weight: 500; white-space: nowrap; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details \u003e summary .ace-form-collapse { display: none; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details[open] \u003e summary .ace-form-expand { display: none; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details[open] \u003e summary .ace-form-collapse { display: inline; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-chevron { display: inline-block; width: 8px; height: 8px; margin: 0 2px 4px; border-bottom: 2px solid currentColor; border-right: 2px solid currentColor; transform: rotate(45deg); transition: transform .15s ease; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq details[open] \u003e summary .ace-form-chevron { transform: rotate(225deg); margin-bottom: 0; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-body { margin: 0; padding: 20px; min-width: 0; color: var(--ace-family-ink); font-size: 15px; line-height: 1.65; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-body \u003e p { margin: 0; line-height: 1.65; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq summary:focus-visible { outline: 3px solid #24731a; outline-offset: 3px; }\n@media (max-width: 640px) {\n  #ace-d-link-dem-s2801sr-copy .ace-article-faq details \u003e summary { padding: 14px 16px; gap: 12px; }\n  #ace-d-link-dem-s2801sr-copy .ace-article-faq h3.ace-form-title { gap: 12px; }\n  #ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-body { padding: 16px; }\n  #ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-toggle { font-size: 11px; gap: 8px; }\n}\n@media (prefers-reduced-motion: reduce) { #ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-chevron { transition: none; } }\n\n\n#ace-d-link-dem-s2801sr-copy .ace-article-faq { width:100%; max-width:100%; box-sizing:border-box; }\n#ace-d-link-dem-s2801sr-copy .ace-article-faq .ace-form-body { border:0; box-shadow:none; }\n\u003c\/style\u003e\n\u003ch2\u003eFibre Connectivity Specified for the Link\u003c\/h2\u003e\n\u003cp\u003eThe DEM-S2801SR is a 25GbE SFP28 optical transceiver for compatible network equipment. It uses a duplex LC connection and 50\/125 µm OM3\/OM4 multimode fibre to support up to 70 m on OM3 or 100 m on OM4. It provides an optical connection choice for supported switches, servers and aggregation equipment.\u003c\/p\u003e\n\u003cp\u003eMatch the module to the host’s supported SFP28 port, fibre type and optical standard at both ends. The 0°C to 70°C operating range applies to the module; the whole installation must also stay within the ratings of the switch, cables and enclosure. A pluggable form factor does not by itself guarantee interoperability with every vendor or every port.\u003c\/p\u003e\n\u003ch2\u003eHighlights\u003c\/h2\u003e\n\u003ch3\u003eOptical Connection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e25GbE networking using an SFP28 module.\u003c\/li\u003e\n\u003cli\u003eDuplex LC fibre connection.\u003c\/li\u003e\n\u003cli\u003eMulti-Mode fibre; 70 m OM3 \/ 100 m OM4 maximum reach.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLink Specification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e850 nm optical wavelength.\u003c\/li\u003e\n\u003cli\u003eIEEE 802.3by; MSA and RoHS compliant.\u003c\/li\u003e\n\u003cli\u003eHot-pluggable module for supported equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePhysical Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating temperature 0°C to 70°C.\u003c\/li\u003e\n\u003cli\u003e25 g module weight.\u003c\/li\u003e\n\u003cli\u003e5-year warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003ch3\u003eChoose the Right Optical Medium\u003c\/h3\u003e\n\u003cp\u003eThis module is designed for 50\/125 µm OM3\/OM4 multimode fibre. The link needs the correct cable, connectors and a matching optical specification at the other end. The two reach figures depend on the multimode fibre grade; choose the cable before treating the headline distance as achievable.\u003c\/p\u003e\n\u003ch3\u003eMatch the Host Port\u003c\/h3\u003e\n\u003cp\u003eThe SFP28 form factor is intended for supported 25GbE equipment. Check the exact switch or adapter model, supported firmware, port mode and compatibility list. A 25G SFP28 module is not automatically supported by a similarly shaped 10G SFP+ slot.\u003c\/p\u003e\n\u003ch3\u003eA Defined Fibre Link\u003c\/h3\u003e\n\u003cp\u003eThe optical interface uses 850 nm light with duplex LC connectors. Two fibre paths carry transmit and receive traffic. Match the optical standard and link budget at both ends; this is not a single-fibre bidirectional module, a copper adapter or a cable that converts incompatible Ethernet standards.\u003c\/p\u003e\n\u003ch3\u003eTemperature Rating Where It Matters\u003c\/h3\u003e\n\u003cp\u003eThe module operates from 0°C to 70°C. This is the module’s commercial operating range, so check cabinet airflow and the host’s thermal requirements. It should not be treated as a hardened outdoor transceiver just because it is metal.\u003c\/p\u003e\n\u003ch3\u003eService a Supported Port\u003c\/h3\u003e\n\u003cp\u003eHot-pluggable construction allows insertion or replacement in equipment that supports the feature. Work on the affected link still interrupts that connection, so plan a maintenance window or a tested redundant path where necessary. Keep fibre end faces clean and use the protective caps when the module is not connected.\u003c\/p\u003e\n\u003ch3\u003ePlan the Complete Optical Connection\u003c\/h3\u003e\n\u003cp\u003eThe offer is an optical module. Fibre patch leads, a second compatible endpoint and any required switch or adapter are separate. Before deployment, confirm connector type, optical loss, fibre grade and the host compatibility matrix so the complete connection is specified rather than relying on the module’s headline distance alone.\u003c\/p\u003e\n\u003ch2\u003eSummary\u003c\/h2\u003e\n\u003cp\u003eThe DEM-S2801SR gives supported 25GbE equipment a defined multi-mode fibre connection. Select the correct host port, matching optical endpoint and fibre cable for a reliable installation.\u003c\/p\u003e\n\u003csection class=\"ace-article-faq\" aria-label=\"Frequently asked questions\"\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails class=\"ace-form-disclosure\" open\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eWhich Fibre Type Does It Use?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eUse 50\/125 µm OM3\/OM4 multimode fibre with duplex LC connectors. Reach depends on the fibre grade: up to 70 m on OM3 and 100 m on OM4.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eWill It Work in Any Pluggable Port?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eNo. Confirm the host explicitly supports this 25GbE SFP28 module and the required port mode. A physically similar socket does not guarantee compatibility.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eDoes It Use One Fibre Strand?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eNo. It uses a duplex LC connection with separate transmit and receive fibre paths. It is not a single-fibre bidirectional module.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eIs It an Industrial-Temperature Module?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eNo industrial-temperature claim is made for this module. Its specified operating range is 0°C to 70°C.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eCan It Be Replaced While the Switch Is Powered?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eIt is hot pluggable when used in supported equipment. The affected link disconnects during replacement; plan maintenance or a redundant path if interruption matters.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eAre Fibre Cables Included?\u003c\/span\u003e\u003cspan class=\"ace-form-toggle\" aria-hidden=\"true\"\u003e\u003cspan class=\"ace-form-expand\"\u003eExpand\u003c\/span\u003e\u003cspan class=\"ace-form-collapse\"\u003eCollapse\u003c\/span\u003e\u003cspan class=\"ace-form-chevron\"\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\u003c\/summary\u003e\u003cdiv class=\"ace-form-body\"\u003e\u003cp\u003eNo. Fibre patch leads and the matching equipment or module at the other end are selected separately.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"D-Link","offers":[{"title":"Default Title","offer_id":44849072504891,"sku":"DEM-S2801SR","price":286.7,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/4541\/3179\/files\/d-link-dem-s2801sr-25gbe-multi-mode-sfp28-transceiver-8032595.png?v=1793693899","url":"https:\/\/aceperipherals.com\/ja\/products\/d-link-dem-s2801sr","provider":"ACE Peripherals","version":"1.0","type":"link"}