{"product_id":"tp-link-ism311ls","title":"TP-Link ISM311LS Industrial Gigabit Single-Mode SFP Module","description":"\u003cdiv id=\"ace-tp-link-ism311ls-copy\"\u003e \u003cstyle\u003e\n#ace-tp-link-ism311ls-copy { font-family: Inter, Arial, sans-serif; color: inherit; }\n\/* Reuses the current ACE calculator FAQ disclosure treatment. Scope: this product FAQ only. *\/\n#ace-tp-link-ism311ls-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: Inter, Arial, sans-serif; }\n#ace-tp-link-ism311ls-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-tp-link-ism311ls-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-tp-link-ism311ls-copy .ace-article-faq summary::-webkit-details-marker { display: none; }\n#ace-tp-link-ism311ls-copy .ace-article-faq summary::marker { content: ''; }\n#ace-tp-link-ism311ls-copy .ace-article-faq summary::before, #ace-tp-link-ism311ls-copy .ace-article-faq summary::after { content: none; }\n#ace-tp-link-ism311ls-copy .ace-article-faq details[open] \u003e summary { border-radius: 12px 12px 0 0; border-bottom: 0; }\n#ace-tp-link-ism311ls-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: Inter, Arial, sans-serif; font-size: 16px; font-weight: 600; line-height: 1.35; letter-spacing: normal; text-transform: none; }\n#ace-tp-link-ism311ls-copy .ace-article-faq .ace-form-title-text { display: flex; flex: 1 1 auto; min-width: 0; margin: 0; overflow-wrap: anywhere; }\n#ace-tp-link-ism311ls-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-tp-link-ism311ls-copy .ace-article-faq details \u003e summary .ace-form-collapse { display: none; }\n#ace-tp-link-ism311ls-copy .ace-article-faq details[open] \u003e summary .ace-form-expand { display: none; }\n#ace-tp-link-ism311ls-copy .ace-article-faq details[open] \u003e summary .ace-form-collapse { display: inline; }\n#ace-tp-link-ism311ls-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-tp-link-ism311ls-copy .ace-article-faq details[open] \u003e summary .ace-form-chevron { transform: rotate(225deg); margin-bottom: 0; }\n#ace-tp-link-ism311ls-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-tp-link-ism311ls-copy .ace-article-faq .ace-form-body \u003e p { margin: 0; line-height: 1.65; }\n#ace-tp-link-ism311ls-copy .ace-article-faq summary:focus-visible { outline: 3px solid #24731a; outline-offset: 3px; }\n@media (max-width: 640px) {\n  #ace-tp-link-ism311ls-copy .ace-article-faq details \u003e summary { padding: 14px 16px; gap: 12px; }\n  #ace-tp-link-ism311ls-copy .ace-article-faq h3.ace-form-title { gap: 12px; }\n  #ace-tp-link-ism311ls-copy .ace-article-faq .ace-form-body { padding: 16px; }\n  #ace-tp-link-ism311ls-copy .ace-article-faq .ace-form-toggle { font-size: 11px; gap: 8px; }\n}\n@media (prefers-reduced-motion: reduce) { #ace-tp-link-ism311ls-copy .ace-article-faq .ace-form-chevron { transition: none; } }\n\n\n#ace-tp-link-ism311ls-copy .ace-article-faq { width:100%; max-width:100%; box-sizing:border-box; }\n#ace-tp-link-ism311ls-copy .ace-article-faq .ace-form-body { border:0; box-shadow:none; }\n\n#ace-tp-link-ism311ls-copy .ace-article-faq {width:100%;max-width:none;box-sizing:border-box;}\n\u003c\/style\u003e\n\u003ch2\u003eIndustrial Fibre Connectivity for a Gigabit Network\u003c\/h2\u003e\n\u003cp\u003eThe TP-Link ISM311LS brings 1000BASE-LX single-mode fibre connectivity to supported Gigabit SFP equipment. Designed for an industrial operating range of −40°C to 85°C, it suits installations where the optical module needs to work across a wider temperature range than ordinary office equipment. Its 1310nm optics, duplex LC\/UPC connection and Digital Diagnostic Monitoring provide a straightforward building block for a properly matched fibre link.\u003c\/p\u003e\n\u003ch2\u003eHighlights\u003c\/h2\u003e\n\u003ch3\u003eA Defined Fibre Connection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1000BASE-LX Gigabit Ethernet optics using 9\/125µm single-mode fibre.\u003c\/li\u003e\n\u003cli\u003eManufacturer reach up to 20KM, subject to the fibre link and optical budget.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIndustrial Module Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating range of −40°C to 85°C.\u003c\/li\u003e\n\u003cli\u003eHot-pluggable SFP module with Digital Diagnostic Monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eClear Host Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor compatible TP-Link switches with Gigabit SFP slots.\u003c\/li\u003e\n\u003cli\u003eManufacturer installation guide also lists MC220L and MC420L media converters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003ch3\u003eChoose the Right Fibre Type\u003c\/h3\u003e\n\u003cp\u003eThis model uses single-mode fibre at 1310nm. Its single-mode optical link supports a manufacturer maximum of 20KM. The actual path must remain within the supported loss budget, including patch panels, joints and connectors. It is not interchangeable with a module intended for another fibre type simply because both use an LC connector.\u003c\/p\u003e\n\u003ch3\u003eMatch Both Ends of the Link\u003c\/h3\u003e\n\u003cp\u003eThe manufacturer recommends using the same transceiver model at each end, so a matching ISM311LS is the straightforward partner for this module. Use a correctly terminated duplex LC\/UPC fibre pair. Unlike a bidirectional WDM module, this design uses separate transmit and receive fibres.\u003c\/p\u003e\n\u003ch3\u003eUse a Supporting Gigabit Host\u003c\/h3\u003e\n\u003cp\u003eThe installation guide identifies TP-Link switches with Gigabit SFP slots and MC220L or MC420L media converters as compatible host categories. Check the exact device revision and supported module list. A module’s industrial temperature rating does not extend the temperature rating of its switch, converter, power supply or enclosure.\u003c\/p\u003e\n\u003ch3\u003eKeep the Link Maintainable\u003c\/h3\u003e\n\u003cp\u003eHot-pluggable installation and Digital Diagnostic Monitoring support planned maintenance and fault investigation. A compatible host can display supported module readings alongside its interface status. Protect connectors from contamination, respect fibre bend limits and use normal ESD precautions when handling the module.\u003c\/p\u003e\n\u003ch2\u003eSummary\u003c\/h2\u003e\n\u003cp\u003eThe ISM311LS is a practical industrial SFP option when single-mode fibre, Gigabit host support and the required link distance match the installation. Select matching remote optics and a suitable fibre path to build a dependable connection.\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\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eIs 1.25Gbps the Ethernet speed?\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 module is for Gigabit Ethernet. The published 1.25Gbps figure is the encoded optical line rate, not a 1.25GbE host connection.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\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 or two?\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 uses a duplex LC\/UPC connection with separate transmit and receive fibres. It is not a single-fibre bidirectional WDM module.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eWhich module should be used 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 manufacturer recommends the same transceiver model at each end. Use a matching ISM311LS and the correct fibre type and termination.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eCan I put it in any SFP or SFP+ 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. The host must support the module at Gigabit speed. The guide lists TP-Link switches with Gigabit SFP slots and MC220L or MC420L media converters; confirm the exact revision and software support.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"ace-form-disclosure\"\u003e\u003csummary\u003e\u003ch3 class=\"ace-form-title\"\u003e\n\u003cspan class=\"ace-form-title-text\"\u003eDoes the industrial rating apply to the whole network?\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 −40°C to 85°C figure applies to this module. The host, power supply and other installed equipment have their own operating limits.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"TP-Link","offers":[{"title":"Default Title","offer_id":44934593544251,"sku":"ISM311LS","price":86.29,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/4541\/3179\/files\/tp-link-ism311ls-industrial-gigabit-single-mode-sfp-module-8511831.jpg?v=1794474134","url":"https:\/\/aceperipherals.com\/fil\/products\/tp-link-ism311ls","provider":"ACE Peripherals","version":"1.0","type":"link"}