{"product_id":"d-link-dem-330t","title":"D-Link DEM-330T Gigabit BiDi Single-Mode 10 km SFP Transceiver","description":"\u003cdiv id=\"ace-d-link-dem-330t-copy\"\u003e\n\u003cstyle\u003e\n#ace-d-link-dem-330t-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-330t-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-330t-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-330t-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-330t-copy .ace-article-faq summary::-webkit-details-marker { display: none; }\n#ace-d-link-dem-330t-copy .ace-article-faq summary::marker { content: ''; }\n#ace-d-link-dem-330t-copy .ace-article-faq summary::before, #ace-d-link-dem-330t-copy .ace-article-faq summary::after { content: none; }\n#ace-d-link-dem-330t-copy .ace-article-faq details[open] \u003e summary { border-radius: 12px 12px 0 0; border-bottom: 0; }\n#ace-d-link-dem-330t-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-330t-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-330t-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-330t-copy .ace-article-faq details \u003e summary .ace-form-collapse { display: none; }\n#ace-d-link-dem-330t-copy .ace-article-faq details[open] \u003e summary .ace-form-expand { display: none; }\n#ace-d-link-dem-330t-copy .ace-article-faq details[open] \u003e summary .ace-form-collapse { display: inline; }\n#ace-d-link-dem-330t-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-330t-copy .ace-article-faq details[open] \u003e summary .ace-form-chevron { transform: rotate(225deg); margin-bottom: 0; }\n#ace-d-link-dem-330t-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-330t-copy .ace-article-faq .ace-form-body \u003e p { margin: 0; line-height: 1.65; }\n#ace-d-link-dem-330t-copy .ace-article-faq summary:focus-visible { outline: 3px solid #24731a; outline-offset: 3px; }\n@media (max-width: 640px) {\n  #ace-d-link-dem-330t-copy .ace-article-faq details \u003e summary { padding: 14px 16px; gap: 12px; }\n  #ace-d-link-dem-330t-copy .ace-article-faq h3.ace-form-title { gap: 12px; }\n  #ace-d-link-dem-330t-copy .ace-article-faq .ace-form-body { padding: 16px; }\n  #ace-d-link-dem-330t-copy .ace-article-faq .ace-form-toggle { font-size: 11px; gap: 8px; }\n}\n@media (prefers-reduced-motion: reduce) { #ace-d-link-dem-330t-copy .ace-article-faq .ace-form-chevron { transition: none; } }\n\n\n#ace-d-link-dem-330t-copy .ace-article-faq { width:100%; max-width:100%; box-sizing:border-box; }\n#ace-d-link-dem-330t-copy .ace-article-faq .ace-form-body { border:0; box-shadow:none; }\n\u003c\/style\u003e\n\u003ch2\u003eMake One Fibre Strand Work in Both Directions\u003c\/h2\u003e\n\u003cp\u003eThe DEM-330T is a 1000BASE-BX-D SFP transceiver for a compatible Gigabit switch or network interface. It connects over single-mode fibre using simplex lc connectivity, with a complementary DEM-330R at the far end.\u003c\/p\u003e\n\u003cp\u003eA single fibre carries transmit and receive traffic on different wavelengths, helping use existing fibre capacity efficiently. The rated maximum reach is 10 km, subject to compatible optics, fibre quality and the complete optical link budget.\u003c\/p\u003e\n\u003ch2\u003eHighlights\u003c\/h2\u003e\n\u003ch3\u003eOptical Connection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1000BASE-BX-D for Gigabit Ethernet over single-mode fibre.\u003c\/li\u003e\n\u003cli\u003eSimplex LC.\u003c\/li\u003e\n\u003cli\u003eComplementary DEM-330R required at the remote end.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDistance and Fibre\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e10 km.\u003c\/li\u003e\n\u003cli\u003e9\/125 µm single-mode fibre.\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-BX-D uses wavelength-division multiplexing over one single-mode fibre strand. 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 10 km rating is a maximum design reach, not a guarantee for any cable of that length. Connector loss, splices, patching, fibre condition and the remote receiver affect the result. Measure and test the commissioned link rather than relying on distance alone.\u003c\/p\u003e\n\u003ch3\u003eMatch the Remote End\u003c\/h3\u003e\n\u003cp\u003eUse DEM-330R at the opposite end of the strand. Its transmit and receive wavelengths complement this module, whereas two identical BiDi modules do not form the intended pair. Both host ports also need to support the required Ethernet speed and exact module.\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 complementary remote module 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-330T provides a replaceable single-strand BiDi 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 one 9\/125 µm single-mode fibre strand with a simplex LC connection and the complementary BiDi module at the remote end.\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 10 km. 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\u003eYes. Pair this model with DEM-330R; their transmit and receive wavelengths are complementary.\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-330T 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":41567738593339,"sku":"DEM-330T","price":58.87,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/4541\/3179\/products\/d-link-dem-330t-gigabit-wdm-bidi-single-mode-10-km-sfp-transceiver-814116.png?v=1702134710","url":"https:\/\/aceperipherals.com\/ko\/products\/d-link-dem-330t","provider":"ACE Peripherals","version":"1.0","type":"link"}