{"id":5787,"date":"2025-07-21T00:00:00","date_gmt":"2025-07-21T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/qsfp28-100g-sr4-vs-lr4-100g-transceiver-comparison\/"},"modified":"2026-06-22T08:53:35","modified_gmt":"2026-06-22T08:53:35","slug":"qsfp28-100g-sr4-vs-lr4-100g-transceiver-comparison","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/products\/qsfp28-100g-sr4-vs-lr4-100g-transceiver-comparison","title":{"rendered":"QSFP28 100G SR4 so v\u1edbi QSFP28 100G LR4: L\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t 100G ph\u00f9 h\u1ee3p"},"content":{"rendered":"<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\/aa9910e271bb4d5983db24fcf190b1d6.webp\" alt=\"QSFP28 100G SR4 vs QSFP28 100G LR4\" class=\"wp-image-5784\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa9910e271bb4d5983db24fcf190b1d6.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa9910e271bb4d5983db24fcf190b1d6-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa9910e271bb4d5983db24fcf190b1d6-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa9910e271bb4d5983db24fcf190b1d6-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa9910e271bb4d5983db24fcf190b1d6-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: rgb(64, 64, 64);\">Deploying 100G Ethernet is essential for modern data centers and high-speed networks, but selecting the right transceiver is critical. The QSFP28 form factor dominates 100G, with SR4 and LR4 being two prevalent types. While both deliver blazing 100Gbps speeds, their underlying technology, application scenarios, and cost structures differ significantly. Understanding the distinctions between the <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/qsfp28-100g-sr4-transceivers\/\"><strong>QSFP28 100G SR4 transceiver<\/strong><\/a><span style=\"color: rgb(64, 64, 64);\"> v\u00e0 <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/100g-lr4-transceiver-long-distance-high-speed-network-guide\/\"><strong>QSFP28 100G LR4 transceiver<\/strong><\/a><span style=\"color: rgb(64, 64, 64);\"> ensures optimal network performance, cost-efficiency, and future scalability. This guide dives deep into their specs, use cases, and helps you decide which <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\"><strong>100G<\/strong><\/a><span style=\"color: rgb(64, 64, 64);\"> best fits your infrastructure needs, highlighting reliable solutions like <\/span><strong>B\u1ed9 thu ph\u00e1t LINK-PP<\/strong><span style=\"color: rgb(64, 64, 64);\">.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Hi\u1ec3u r\u00f5 c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px 0px 4px;\"><strong>QSFP28 100G SR4 Transceiver:<\/strong><\/p><ul><li><p style=\"margin: 0px;\"><strong>C\u00f4ng ngh\u1ec7:<\/strong> chuy\u1ec3n m\u1ea1ch ch\u1ecdn l\u1ecdc b\u01b0\u1edbc s\u00f3ng d\u1ef1a tr\u00ean WSS <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/overview-of-vcsel\/\">VCSEL (Laser ph\u00e1t x\u1ea1 b\u1ec1 m\u1eb7t khoang d\u1ecdc)<\/a> lasers operating at 850nm wavelength.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Lo\u1ea1i c\u00e1p quang:<\/strong> \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/om1-om2-om3-om4-om5-multimode-fiber-guide\/\"><strong>s\u1ee3i quang \u0111a mode (MMF)<\/strong><\/a>, specifically OM3 or OM4.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>K\u1ebft n\u1ed1i:<\/strong> Utilizes an MPO-12\/MTP\u00ae connector. It transmits and receives over 4 parallel lanes in each direction (4x25G).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Key Application:<\/strong> Short-reach, high-density connections within a data center or between adjacent racks (Top-of-Rack to Aggregation\/Spine switches).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>LINK-PP Model Example:<\/strong> LINK-PP <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473115.htm\">LQ-M85100-SR4C<\/a> (Compliant with QSFP28 MSA, 100m over OM4).<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px 0px 4px;\"><strong>QSFP28 100G LR4 Transceiver:<\/strong><\/p><ul><li><p style=\"margin: 0px;\"><strong>C\u00f4ng ngh\u1ec7:<\/strong> chuy\u1ec3n m\u1ea1ch ch\u1ecdn l\u1ecdc b\u01b0\u1edbc s\u00f3ng d\u1ef1a tr\u00ean WSS <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/dfb-laser-definition\/\">laser ph\u1ea3n h\u1ed3i ph\u00e2n b\u1ed1 (DFB)<\/a> operating at four LWDM wavelengths (around 1295nm, 1300nm, 1305nm, 1310nm).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Lo\u1ea1i c\u00e1p quang:<\/strong> \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-single-mode-fiber-and-how-does-it-work\/\"><strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong><\/a>, specifically OS2.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>K\u1ebft n\u1ed1i:<\/strong> Utilizes a standard duplex LC connector. It multiplexes the four wavelengths onto a single fiber pair <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/wdm-optical-transceiver-module-applications\/\">(WDM technology)<\/a>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Key Application:<\/strong> Long-reach connections between data centers (DCI), campus backbones, service provider networks, and Metro access.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>LINK-PP Model Example:<\/strong> LINK-PP <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472118.htm\">LQ-LW100-LR4C<br><\/a> (Compliant with QSFP28 MSA, up to 10km over SMF).<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Head-to-Head Comparison: QSFP28 SR4 vs LR4<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The following table summarizes the critical differences:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1eb7c t\u00ednh<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>QSFP28 100G SR4 Transceiver<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>QSFP28 100G LR4 Transceiver<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>10km, 20km, 40km<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Up to 70m (OM3)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>L\u00ean t\u1edbi 10 km<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p\/><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Up to 100m (OM4)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><em>(Standard LR4 specification)<\/em><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Lo\u1ea1i s\u1ee3i<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>S\u1ee3i quang \u0111a mode (OM3\/OM4)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>S\u1ee3i quang \u0111\u01a1n mode (OS2)<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ea7u n\u1ed1i<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>MPO-12\/MTP\u00ae<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ea7u n\u1ed1i LC hai chi\u1ec1u (Duplex LC)<br><\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>B\u01b0\u1edbc s\u00f3ng<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>850 nm (4 k\u00eanh)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>LWDM (4 lanes: ~1295-1310nm)<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Lo\u1ea1i laser<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Laser VCSEL.<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>DFB<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110i\u1ec1u ch\u1ebf<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>NRZ<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>NRZ<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>~3,5 W<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>~3,5W \u2013 4,5W<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng c\u00e1p<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Lower<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Cao h\u01a1n<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ch\u00ednh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Data Center Inter-Rack Connectivity, High-Density Short Reach<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>Data Center Interconnect (DCI), Campus\/Metro Networks, Long Reach<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cost-effective for short distances, leverages existing MMF cabling<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Long reach over SMF, standard duplex LC compatibility<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Key Differences Explained<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>Reach &amp; Fiber Type:<\/strong> This is the most significant difference. <strong>SR4 is strictly for short distances<\/strong> within a data center using MMF. <strong>LR4 excels at distances up to 10km<\/strong> over SMF. Choosing the wrong <strong>module quang s\u1ee3i<\/strong> for your distance requirement will result in link failure.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Connector &amp; Cabling:<\/strong> SR4 requires MPO\/MTP\u00ae-terminated MMF trunks (often 8 or 12 fiber). LR4 uses standard LC duplex patch cords on SMF, offering simpler cable management and leveraging ubiquitous LC infrastructure.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Technology &amp; Cost:<\/strong> SR4 uses simpler VCSEL lasers and parallel optics over MMF, making it generally <strong>ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n<\/strong> for short reach. LR4 employs more complex WDM optics and DFB lasers on SMF, increasing its price point but enabling long reach.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Power &amp; Heat:<\/strong> While both are within the QSFP28 power envelope, LR4 modules often consume slightly more power (especially over temperature\/distance) than SR4 modules. Consider thermal design in dense chassis.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Application Focus:<\/strong> SR4 is the workhorse for <strong>intra-data center 100G links<\/strong>. LR4 is essential for <strong>connecting geographically separate locations<\/strong> or long campus runs.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 How to Choose Between QSFP28 100G SR4 and QSFP28 100G LR4 Transceiver<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5.webp\" alt=\"QSFP28 100G SR4 vs QSFP28 100G LR4\" class=\"wp-image-5785\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fab80848a938443ab616482fc9181cc5-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to Choose QSFP28 100G SR4<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\">You need to connect switches within the same rack or adjacent racks.<\/p><\/li><li><p style=\"margin: 0px;\">Your existing cabling plant is OM3 or OM4 multimode fiber.<\/p><\/li><li><p style=\"margin: 0px;\">Your link distances are <strong>100 meters or less<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\">Cost optimization for high-density, short-reach deployments is critical.<\/p><\/li><li><p style=\"margin: 0px;\">You require compatibility with <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473115.htm\"><strong>100G SR4 optical modules<\/strong><\/a> for ToR (Top-of-Rack) aggregation.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to Choose QSFP28 100G LR4<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\">You need to connect switches between different buildings or data centers.<\/p><\/li><li><p style=\"margin: 0px;\">Your existing cabling plant is OS2 single-mode fiber.<\/p><\/li><li><p style=\"margin: 0px;\">Your link distances are <strong>between 100m and 10km<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\">You need the flexibility and future-proofing of SMF infrastructure.<\/p><\/li><li><p style=\"margin: 0px;\">You require compatibility with standard LC patch panels and cabling for <strong>long-distance 100G connectivity<\/strong>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Why Choose LINK-PP 100G Transceivers?<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5.webp\" alt=\"100G Optical Transceivers\" class=\"wp-image-5786\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5-300x169.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5-1024x576.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5-768x432.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5785e84c332e475cac61c9fee40c03a5-18x10.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LINK-PP<\/strong> cung c\u1ea5p c\u00e1c m\u00f4-\u0111un quang h\u1ecdc SFP+ hi\u1ec7u n\u0103ng cao, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n MSA, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\"><strong>m\u00f4-\u0111un 100G QSFP28<\/strong><\/a>, including both SR4 and LR4 variants, rigorously tested for interoperability and reliability. Our optics offer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong><p>The most significant benefit. Utilize existing fiber runs fully without costly new installations. Ideal for<\/p><\/strong> Ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 so v\u1edbi c\u00e1c m\u00f4-\u0111un c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb g\u1ed1c (OEM).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ea3m b\u1ea3o t\u01b0\u01a1ng th\u00edch:<\/strong> Extensive testing ensures seamless operation with major switch brands (Cisco, Juniper, Arista, Dell, HPE, etc.).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ch\u1ea5t l\u01b0\u1ee3ng &amp; \u0110\u1ed9 tin c\u1eady:<\/strong> Rigorous quality control processes ensure low failure rates and long-term performance.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>B\u1ea3o h\u00e0nh tr\u1ecdn \u0111\u1eddi v\u00e0 h\u1ed7 tr\u1ee3:<\/strong> Backed by expert technical support. <strong>Upgrade your network infrastructure cost-effectively with reliable LINK-PP optics today.<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 K\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ef1a ch\u1ecdn gi\u1eefa m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473115.htm\"><strong>QSFP28 100G SR4<\/strong><\/a> v\u00e0 m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472118.htm\"><strong>QSFP28 100G LR4 transceiver<\/strong><\/a> boils down to two fundamental factors: <strong>required transmission distance<\/strong> and <strong>existing fiber optic cabling type<\/strong>. For cost-effective, high-density connections within 100 meters leveraging multimode fiber, the <strong>SR4 optical module<\/strong> is the clear choice. For versatile, long-reach connectivity up to 10 kilometers over single-mode fiber, the <strong>LR4 transceiver<\/strong> is indispensable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding these differences ensures you invest in the right <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\"><strong>100G fiber optic transceiver<\/strong><\/a> technology, optimizing both performance and budget. Don&#8217;t compromise on reliability for your critical 100G links.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ready to deploy reliable, high-performance 100G connectivity?<\/strong><br\/><strong>Explore LINK-PP&#8217;s extensive range of MSA-compliant QSFP28 100G SR4 and LR4 transceivers today. <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/message.htm\"><strong>Get a quote \u279e<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/support.htm\"><strong>H\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt \u279e<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 FAQ: QSFP28 100G SR4 vs LR4<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Q: Can I use an SR4 transceiver over single-mode fiber?<\/strong><br\/><strong>A: No, absolutely not.<\/strong> SR4 is designed <em>ch\u1ec9<\/em> for multimode fiber (OM3\/OM4). Attempting to use it over SMF will fail immediately or cause severe errors. Always match the <strong>lo\u1ea1i m\u00f4-\u0111un quang<\/strong> to the fiber type.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Q: Can I use an LR4 transceiver over multimode fiber?<\/strong><br\/><strong>\u0110: Kh\u00f4ng.<\/strong> LR4 requires single-mode fiber (OS2). Using it over MMF will not achieve the required distance or performance.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Q: What is the maximum distance for QSFP28 LR4?<\/strong><br\/><strong>A:<\/strong> The standard specification for QSFP28 100G LR4 is <strong>up to 10 kilometers<\/strong> over OS2 single-mode fiber. Ensure your optical budget (link loss) supports the required distance.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Q: Are SR4 and LR4 transceivers interoperable?<\/strong><br\/><strong>A:<\/strong> No, they are not directly interoperable with each other. An SR4 module must connect to another SR4 module over MMF. An LR4 module must connect to another LR4 module over SMF. They use fundamentally different optical technologies and fiber paths.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Q: What about ER4 or ZR4 modules?<\/strong><br\/><strong>A:<\/strong> These are variants for even longer distances than LR4. ER4 typically reaches ~40km, and ZR4 reaches ~80km. They consume significantly more power and cost more than LR4. LR4 (10km) covers the vast majority of campus and metro DCI needs.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Xem th\u00eam<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/100g-lr4-transceiver-long-distance-high-speed-network-guide\/\">Hi\u1ec3u r\u00f5 b\u1ed9 thu ph\u00e1t 100G LR4 cho c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/qsfp28-100g-sr4-transceivers\/\">M\u1edf kh\u00f3a transceiver QSFP28 100G SR4 t\u1ed1c \u0111\u1ed9 cao c\u1ee7a LINK-PP \u2013 LQ-M85100-SR4C<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/100g-optical-transceiver-form-factors-guide\/\">H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 c\u00e1c d\u1ea1ng module b\u1ed9 thu ph\u00e1t quang 100G<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/link-pp-100g-transceivers-connectivity\/\">T\u1ea1i sao n\u00ean ch\u1ecdn b\u1ed9 thu ph\u00e1t 100G LINK-PP cho k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao?<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>So s\u00e1nh QSFP28 100G SR4 v\u00e0 LR4 \u0111\u1ec3 l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t 100G ph\u00f9 h\u1ee3p cho m\u1ea1ng c\u1ee7a b\u1ea1n d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch, lo\u1ea1i c\u00e1p quang, \u0111\u1ea7u n\u1ed1i v\u00e0 ng\u00e2n s\u00e1ch.<\/p>","protected":false},"author":1,"featured_media":5784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[13],"class_list":["post-5787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products","tag-100g-modules"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=5787"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5787\/revisions"}],"predecessor-version":[{"id":11316,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5787\/revisions\/11316"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5784"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}