{"id":5739,"date":"2026-05-14T05:51:09","date_gmt":"2026-05-14T05:51:09","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/400g-qsfp-dd-transceivers-technology-overview\/"},"modified":"2026-06-22T03:24:01","modified_gmt":"2026-06-22T03:24:01","slug":"400g-qsfp-dd-transceivers-technology-overview","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/400g-qsfp-dd-transceivers-technology-overview","title":{"rendered":"400G QSFP\u2011DD \ud2b8\ub79c\uc2a4\uc2dc\ubc84: \uae30\uc220 \uac1c\uc694"},"content":{"rendered":"<h2 class=\"wp-block-heading\" >\uc11c\ub860<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112.htm?ca=1435&amp;cv=7969\"><strong>400G QSFP-DD<\/strong><\/a> \uace0\ub300\uc5ed\ud3ed \ub124\ud2b8\uc6cc\ud0b9\uc758 \ud575\uc2ec \uae30\uc220\uc774 \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc804\ub2ec\uc744 \uc704\ud574 \uc124\uacc4\ub428 <strong>400Gbps per port<\/strong>, LQ-SW100-SR4C <strong>\ucffc\ub4dc \uc18c\ud615 \ud3fc\ud329\ud130 \ud50c\ub7ec\uadf8\uc5b4\ube14 \uc774\uc911 \ubc00\ub3c4(QSFP-DD)<\/strong> \uc778\ud130\ud398\uc774\uc2a4\ub294 \ud45c\uc900 QSFP \ubaa8\ub4c8\uc758 \ub808\uc778 \ubc00\ub3c4\ub97c 2\ubc30\ub85c \uc99d\uac00\uc2dc\ucf1c, \ucd08\uaddc\ubaa8 \ub370\uc774\ud130 \uc13c\ud130, \ud074\ub77c\uc6b0\ub4dc \ucef4\ud4e8\ud305, HPC \ubc0f AI \uae30\ubc18 \ub124\ud2b8\uc6cc\ud06c \ud328\ube0c\ub9ad\uc5d0 \uc774\uc0c1\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f.webp\" alt=\"QSFP\u2011DD 400G Transceivers\" class=\"wp-image-5735\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud3fc \ud329\ud130 \ubc0f \uc804\uae30 \uc778\ud130\ud398\uc774\uc2a4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Built upon the QSFP28 footprint, QSFP-DD incorporates an 8-lane electrical interface (each 50G using PAM4 or 25G using<strong> <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/understanding-non-return-to-zero-in-digital-communication\/\"><strong>outer OMA<\/strong><\/a>), delivering up to 400Gbps. Ascent Optics notes the dual-row 76-pin design enables backward compatibility with QSFP28\/56 devices\u2014a key trait for smooth network upgrades.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >PAM4 \ubcc0\uc870 \ubc0f \uad11\ud559 \ub808\uc778 \uad6c\uc870<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"1100\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2.webp\" alt=\"PAM4 Modulation\" class=\"wp-image-5736\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-300x275.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-1024x939.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-768x704.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-13x12.webp 13w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Modern 400G QSFP-DD optics rely on <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics\/\"><strong>PAM4<\/strong><\/a><strong> (4\ub808\ubca8 \ud384\uc2a4 \uc9c4\ud3ed \ubcc0\uc870)<\/strong>. \uc2ec\ubcfc\ub2f9 2\ube44\ud2b8\ub97c \uc778\ucf54\ub529\ud568\uc73c\ub85c\uc368, \uc2e0\ud638 \ub300\uc5ed\ud3ed\uc744 \uc99d\uac00\uc2dc\ud0a4\uc9c0 \uc54a\uace0\ub3c4 \ub370\uc774\ud130 \ucc98\ub9ac\ub7c9\uc744 2\ubc30\ub85c \ub298\ub9bd\ub2c8\ub2e4\u2014\uace0\uc18d \ub9c1\ud06c\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uad11\ud559 \ub808\uc778 \uad6c\uc131\uc740 \ubaa8\ub4c8 \uc720\ud615\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SR4\/SR8<\/strong>: 4 or 8 parallel multimode lanes (e.g., SR4 modules use 4 parallel lanes each operating at ~100Gbps PAM4 (53.125GBd), while SR8 modules utilize 8 lanes at ~50Gbps PAM4 (26.5625GBd), enabling high-density short-reach connections over multimode fiber.). Ideal for short-range (&lt;100m) interconnects in MMF backbone.<\/p><\/li><li><p><strong>DR4<\/strong>: 4-lane single-mode MPO-12 optics supporting ~500m over SMF.<\/p><\/li><li><p><strong>FR4<\/strong>: 4\u00d7100G CWDM lanes using duplex LC, supporting 2km on SMF.<\/p><\/li><li><p><strong>LR4<\/strong>: Similar to FR4 but engineered for longer 10km reaches at 1310nm.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\uc5f4 \uc124\uacc4 \ubc0f \uc804\ub825 \uad00\ub9ac<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\">Operating at 400G, efficient thermal management is vital. LINK-PP\u2019s <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">LQD-CW400-LR4C<\/a><span class=\"qc-p1-tag\">, for example, supports up to ~12W dissipation and employs a flat-top, SMT connector design, <\/span>\ud3c9\uba74\ud615 \ud788\ud2b8\uc2f1\ud06c\uac00 \uc7a5\ucc29\ub418\uc5b4 \uace0\ubc00\ub3c4 \ucf00\uc774\uc9c0 \ub0b4\uc5d0\uc11c \uac1c\uc120\ub41c \uacf5\uae30 \ud750\ub984 \ud638\ud658\uc131\uc744 \uc704\ud574 \uc124\uacc4\ub428<span class=\"qc-p1-tag\">. \uc774\ub7ec\ud55c \ud2b9\uc9d5\uc740 \uc911\ubd80\ud558 \uc791\uc5c5 \uc870\uac74\uc5d0\uc11c\ub3c4 \uc548\uc815\uc801\uc778 \uc131\ub2a5\uc744 \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud45c\uc900 \ubc0f \ud558\uc704 \ud638\ud658\uc131<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">QSFP-DD complies with the <strong>QSFP-DD MSA<\/strong> \ubc0f IEEE <strong>3bs<\/strong> \ubc0f <strong>3cd<\/strong> \ud45c\uc900\uc744 \uc9c0\uc6d0\ud558\uba70, <strong>400GAUI-8<\/strong> electrical interface \u2014 an 8-lane 50Gbps PAM4 signaling protocol used for 400G Ethernet framing. While offering backward compatibility with 100\/200\/400G devices via adapters or breakout cables. This flexibility simplifies deployment and stepwise upgrades.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >LINK-PP LQD-CW400 Series: Practical Implementations<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"449\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22.webp\" alt=\"400G QSFP\u2011DD Optical Modules\" class=\"wp-image-5737\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-300x112.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-1024x383.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-768x287.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-18x7.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP offers a full range of <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112-page1.htm?ca=1435,1454&amp;cv=7969,8282\">400G QSFP-DD Optical Modules<\/a> \ub2e4\uc591\ud55c \uc751\uc6a9 \ubd84\uc57c\uc5d0 \ub9de\ucda4\ud654\ub428:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>LQD-CW400-DR4C<\/strong> \u2013 QSFP-DD PAM4 500m over SMF, Support 4\u00d7100G-DR;<\/p><\/li><li><p><strong>LQD-CW400-FR4C<\/strong> \u2013 2km over SMF with duplex LC connector;<\/p><\/li><li><p><strong>LQD-CW400-LR4C<\/strong> \u2013 Up to 10km reach, 1310nm CWDM optics <\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Each unit supports CMIS 4.0, digital optical monitoring, and operates from 0\u00b0C to 70\u00b0C with &lt;10W typical power. Free samples and OEM integration support are available via LINK-PP\u2019s official store at <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">l\u2011p.com<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\uc751\uc6a9 \ubd84\uc57c \ubc0f \uc774\uc810<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Data Center &amp; Spine-Leaf<\/strong>: \uace0\ubc00\ub3c4 400\u202fG \uc5f0\uacb0\uc740 \uacf5\uac04\uacfc \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud569\ub2c8\ub2e4.<\/p><\/li><li><p><strong>HPC \ubc0f AI \ud074\ub7ec\uc2a4\ud130<\/strong>: \ud6c8\ub828 \ubc0f \uc2dc\ubbac\ub808\uc774\uc158\uc5d0 \ud544\uc218\uc801\uc778 \ub0ae\uc740 \uc9c0\uc5f0 \uc2dc\uac04\uacfc \ub192\uc740 \ucc98\ub9ac\ub7c9.<\/p><\/li><li><p><strong>5G \ud504\ub860\ud2b8\ud640 \ubc0f \uc804\uc1a1<\/strong>: FR4 \ubc0f DR4 \ubaa8\ub4c8\uc740 \ub3c4\uc2dc \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c \uacac\uace0\ud55c \ub9c1\ud06c \uae38\uc774\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/p><\/li><li><p><strong>Cloud-scale &amp; DCI<\/strong>: \ucea0\ud37c\uc2a4 \ubc0f \uba54\ud2b8\ub85c \ud658\uacbd \uc804\ubc18\uc5d0 \uac78\uccd0 \ud655\uc7a5 \uac00\ub2a5\ud55c \uc778\ud130\ud398\uc774\uc2a4.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774\ub7ec\ud55c \ubaa8\ub4c8\uc740 <strong>\uc774\uc804 \uc138\ub300\ubcf4\ub2e4 2\ubc30 \ub192\uc740 \ud3ec\ud2b8 \ubc00\ub3c4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4<\/strong>, \uc6d0\ud65c\ud55c <strong>800G migration readiness<\/strong>, \uc640 <strong>\uad11\ubc94\uc704\ud55c \ud558\uc704 \ud638\ud658\uc131<\/strong> \uc744 \uae30\uc874 100G\/200G \uc778\ud504\ub77c\uc640 \ube0c\ub808\uc774\ud06c\uc544\uc6c3 \ub610\ub294 \uc5b4\ub311\ud130 \uc194\ub8e8\uc158\uc744 \ud1b5\ud574 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\uacb0\ub860<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>400G QSFP-DD<\/strong> \uc774\uc81c \ucc28\uc138\ub300 \ub124\ud2b8\uc6cc\ud06c \uc778\ud504\ub77c\uc758 \ud45c\uc900 \uc8fc\ub3c4 \uae30\uc220\uc774 \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc18c\ud615 \ub514\uc790\uc778, PAM4 \ubcc0\uc870, \ub2e4\uc591\ud55c \uad11\ud559 \uc635\uc158, \uadf8\ub9ac\uace0 \uc5f4\uc801 \ud0c4\ub825\uc131\uc740 \ub370\uc774\ud130 \uc13c\ud130, HPC, AI \ubc0f \ud1b5\uc2e0 \uc751\uc6a9 \ubd84\uc57c \uc804\ubc18\uc5d0 \uac78\uccd0 \ub6f0\uc5b4\ub09c \uc131\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For enterprises preparing to transition to 400G networks, the <strong>LINK-PP LQD-CW400 series<\/strong> \ub2e4\uc74c\uc744 \ud3ec\ud568\ud558\ub294 \ud3ec\ud2b8\ud3f4\ub9ac\uc624\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4: <strong>\ud45c\uc900 \uc900\uc218<\/strong>, <strong>\uc0c1\ud638 \uc6b4\uc6a9\uc131 \ud14c\uc2a4\ud2b8 \uc644\ub8cc<\/strong> modules \u2014 spanning SR to LR4 \u2014 designed to integrate smoothly into existing ecosystems. Visit <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">LINK-PP\u2019s official store<\/a> \uc81c\ud488 \uc0ac\uc591\uc11c \ud655\uc778, \uacac\uc801 \uc694\uccad \ub610\ub294 \ubb34\ub8cc \ud3c9\uac00 \uc0d8\ud50c \uc694\uccad\uc744 \uc704\ud574.<\/p>","protected":false},"excerpt":{"rendered":"<p>\ud615\uc2dd \uc778\uc790, \ubcc0\uc870, \uad11\ud559 \ub808\uc778, \uc5f4 \uc124\uacc4\ub97c \ud3ec\ud568\ud55c 400\u202fG QSFP\u2011DD \ud2b8\ub79c\uc2a4\uc2dc\ubc84\uc758 \uae30\uc220\uc801 \ubc30\uacbd\uc744 \ud0d0\uc0c9\ud558\uc138\uc694. <\/p>","protected":false},"author":1,"featured_media":5738,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[17,26],"class_list":["post-5739","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-400g-optical-modules","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/5739","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/comments?post=5739"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/5739\/revisions"}],"predecessor-version":[{"id":10685,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/5739\/revisions\/10685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/media\/5738"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/media?parent=5739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/categories?post=5739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/tags?post=5739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}