{"product_id":"d-link-dem-312gt2","title":"D-Link DEM-312GT2 Gigabit Multimode 2 km SFP Transceiver","description":"\u003cdiv id=\"ace-d-link-dem-312gt2-copy\"\u003e\n\u003cstyle\u003e\n#ace-d-link-dem-312gt2-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-312gt2-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-312gt2-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-312gt2-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-312gt2-copy .ace-article-faq summary::-webkit-details-marker { display: none; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq summary::marker { content: ''; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq summary::before, #ace-d-link-dem-312gt2-copy .ace-article-faq summary::after { content: none; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq details[open] \u003e summary { border-radius: 12px 12px 0 0; border-bottom: 0; }\n#ace-d-link-dem-312gt2-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-312gt2-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-312gt2-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-312gt2-copy .ace-article-faq details \u003e summary .ace-form-collapse { display: none; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq details[open] \u003e summary .ace-form-expand { display: none; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq details[open] \u003e summary .ace-form-collapse { display: inline; }\n#ace-d-link-dem-312gt2-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-312gt2-copy .ace-article-faq details[open] \u003e summary .ace-form-chevron { transform: rotate(225deg); margin-bottom: 0; }\n#ace-d-link-dem-312gt2-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-312gt2-copy .ace-article-faq .ace-form-body \u003e p { margin: 0; line-height: 1.65; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq summary:focus-visible { outline: 3px solid #24731a; outline-offset: 3px; }\n@media (max-width: 640px) {\n  #ace-d-link-dem-312gt2-copy .ace-article-faq details \u003e summary { padding: 14px 16px; gap: 12px; }\n  #ace-d-link-dem-312gt2-copy .ace-article-faq h3.ace-form-title { gap: 12px; }\n  #ace-d-link-dem-312gt2-copy .ace-article-faq .ace-form-body { padding: 16px; }\n  #ace-d-link-dem-312gt2-copy .ace-article-faq .ace-form-toggle { font-size: 11px; gap: 8px; }\n}\n@media (prefers-reduced-motion: reduce) { #ace-d-link-dem-312gt2-copy .ace-article-faq .ace-form-chevron { transition: none; } }\n\n\n#ace-d-link-dem-312gt2-copy .ace-article-faq { width:100%; max-width:100%; box-sizing:border-box; }\n#ace-d-link-dem-312gt2-copy .ace-article-faq .ace-form-body { border:0; box-shadow:none; }\n\u003c\/style\u003e\n\u003ch2\u003eExtend a Managed Network Over the Right Fibre\u003c\/h2\u003e\n\u003cp\u003eThe DEM-312GT2 is a 1000BASE-SX SFP transceiver for a compatible Gigabit switch or network interface. It connects over multimode fibre using a duplex lc interface.\u003c\/p\u003e\n\u003cp\u003eIts compact hot-pluggable design makes the optical connection replaceable without treating the whole switch as a fixed fibre interface. Reach depends on the fibre core: up to 2 km on 50\/125 µm or 1 km on 62.5\/125 µm.\u003c\/p\u003e\n\u003ch2\u003eHighlights\u003c\/h2\u003e\n\u003ch3\u003eOptical Connection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1000BASE-SX for Gigabit Ethernet over multimode fibre.\u003c\/li\u003e\n\u003cli\u003eDuplex LC.\u003c\/li\u003e\n\u003cli\u003eMatching host and remote optical interfaces are required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDistance and Fibre\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 2 km on 50\/125 µm; up to 1 km on 62.5\/125 µm.\u003c\/li\u003e\n\u003cli\u003e50\/125 µm or 62.5\/125 µm multimode fibre; reach varies by grade.\u003c\/li\u003e\n\u003cli\u003eCalculate optical loss and receiver limits before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHot-pluggable SFP form factor.\u003c\/li\u003e\n\u003cli\u003e3.3 V power supplied by a compatible host slot.\u003c\/li\u003e\n\u003cli\u003eCheck host support, firmware and operating limits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003ch3\u003eChoose the Optical Link for the Site\u003c\/h3\u003e\n\u003cp\u003e1000BASE-SX connects a suitable Gigabit interface to multimode fibre. The connector, wavelength, speed and fibre type must all match the complete link. A mechanically fitting module is not proof that a switch or network card supports its optical mode.\u003c\/p\u003e\n\u003ch3\u003eUse the Rated Reach as a Design Limit\u003c\/h3\u003e\n\u003cp\u003eThe same module reaches up to 2 km on 50\/125 µm multimode fibre and up to 1 km on 62.5\/125 µm. Fibre core size matters; a maximum 2 km figure does not apply to every multimode installation.\u003c\/p\u003e\n\u003ch3\u003eMatch the Remote End\u003c\/h3\u003e\n\u003cp\u003eUse a remote optical interface with the corresponding speed, fibre type and compatible wavelength. Duplex optical connections use separate transmit and receive strands; preserve the correct polarity through the patching. Check the manufacturer’s host support information for each end.\u003c\/p\u003e\n\u003ch3\u003eKeep Maintenance Modular\u003c\/h3\u003e\n\u003cp\u003eThe hot-pluggable SFP design allows replacement at the supported host port without restarting the entire switch. Removing the module still interrupts the traffic on that link. Follow the host’s installation procedure, handle the unit with appropriate ESD precautions and protect the optical connector from dust.\u003c\/p\u003e\n\u003ch3\u003eRespect Optical and Environmental Limits\u003c\/h3\u003e\n\u003cp\u003eConfirm the host and module operating conditions before installation. Long-reach optics may require attenuation on a short or low-loss link to avoid exceeding the receiver’s maximum input. Use an optical power meter and the documented transmit\/receive limits to validate the installation.\u003c\/p\u003e\n\u003ch3\u003eComplete the Link With the Correct Equipment\u003c\/h3\u003e\n\u003cp\u003eThis offer is one SFP transceiver. The host, fibre cable, patch panels and remote optical interface are separate. Select those parts as one link design, retaining a record of the installed module identity and optical measurements for future maintenance.\u003c\/p\u003e\n\u003ch2\u003eSummary\u003c\/h2\u003e\n\u003cp\u003eThe DEM-312GT2 provides a replaceable Gigabit fibre connection when its optical mode, cabling and supported host are selected together. Plan the remote end and optical budget before ordering, then verify the completed link so the installation has a clear, maintainable specification.\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\"\u003eWill It Work in Any SFP Slot?\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. The host must explicitly support this module, its SFP form factor, Ethernet speed and optical mode. An SFP-shaped socket or the same brand name alone does not establish 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\"\u003eWhich Fibre Cable Does It Need?\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 or 62.5\/125 µm multimode fibre and compatible duplex LC patching. Keep connector polarity and cleanliness under control.\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 the Maximum Distance Guaranteed?\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. The documented reach is Up to 2 km on 50\/125 µm; up to 1 km on 62.5\/125 µm. It depends on the complete optical path, fibre type and condition, connector\/splice losses and receiver limits. Validate the installed link.\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\"\u003eDo I Need a Different Module at the Other End?\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\u003eThe remote interface must match the optical mode, speed, fibre and wavelength. It can be a supported matching transceiver or another explicitly compatible interface; confirm both ends of the link.\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 a Long-Reach Module Be Used on a Short Cable?\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\u003eOnly if the resulting optical power is within the receiver’s permitted range. Some short links require an appropriate attenuator. Check the exact transmit\/receive specifications and measure the link before use.\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\"\u003eWhat Is 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\u003eOne DEM-312GT2 transceiver. The host switch or interface, fibre cable, remote module and any required attenuation are separate. Keep the supplied module identification and host compatibility information with the installation record.\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":41567738429499,"sku":"DEM-312GT2","price":58.87,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/4541\/3179\/products\/d-link-dem-312gt2-1000base-sx-multi-mode-2-km-lc-sfp-transceiver-472141.png?v=1702134710","url":"https:\/\/aceperipherals.com\/products\/d-link-dem-312gt2","provider":"ACE Peripherals","version":"1.0","type":"link"}