{"id":2766,"date":"2026-03-31T00:00:00","date_gmt":"2026-03-31T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/products\/40gbase-er4-reach-compatibility-and-deployment-guide-2\/"},"modified":"2026-06-22T03:41:12","modified_gmt":"2026-06-22T03:41:12","slug":"40gbase-er4-reach-compatibility-and-deployment-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/products\/40gbase-er4-reach-compatibility-and-deployment-guide","title":{"rendered":"40GBASE-ER4: H\u01b0\u1edbng d\u1eabn v\u1ec1 ph\u1ea1m vi ph\u1ee7 s\u00f3ng, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 tri\u1ec3n khai"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"536\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077-1024x536.jpg\" alt=\"40GBASE-ER4: Reach, Compatibility, and Deployment Guide\" class=\"wp-image-2755\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077-18x9.jpg 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4ce94cb40a0f4523b8ef9dd6bd22a077.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng quang t\u1ed1c \u0111\u1ed9 cao hi\u1ec7n \u0111\u1ea1i, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472716.htm\">40GBASE-ER4<\/a> l\u00e0 m\u1ed9t giao th\u1ee9c l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26153-40g-qsfp.htm\">B\u1ed9 thu ph\u00e1t quang QSFP+<\/a> ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c truy\u1ec1n d\u1eabn Ethernet 40 Gigabit t\u1ea7m xa tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF). N\u00f3 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c tri\u1ec3n khai trong c\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 c\u00e1c li\u00ean k\u1ebft m\u1ea1ng ph\u1ea3i k\u00e9o d\u00e0i t\u1edbi kho\u1ea3ng 40 km, do \u0111\u00f3 tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p then ch\u1ed1t cho c\u00e1c li\u00ean k\u1ebft n\u1ed9i b\u1ed9 trung t\u00e2m d\u1eef li\u1ec7u, t\u1ed5ng h\u1ee3p m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 m\u1ea1ng l\u00f5i doanh nghi\u1ec7p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c v\u1edbi c\u00e1c thi\u1ebft b\u1ecb quang 40G t\u1ea7m ng\u1eafn ho\u1eb7c d\u1ef1a tr\u00ean s\u1ee3i \u0111a mode, 40GBASE-ER4 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/wdm-optical-transceiver-module-applications\/\">WDM<\/a>) \u0111\u1ec3 truy\u1ec1n b\u1ed1n t\u00edn hi\u1ec7u 10G ri\u00eang bi\u1ec7t tr\u00ean s\u1ee3i quang \u0111\u01a1n mode duplex. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p n\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t b\u0103ng th\u00f4ng cao \u0111\u1ed3ng th\u1eddi duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i \u2014 m\u1ed9t y\u00eau c\u1ea7u thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac m\u1ea1ng ph\u00e2n t\u00e1n hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb g\u00f3c \u0111\u1ed9 tri\u1ec3n khai th\u1ef1c t\u1ebf, c\u00e1c nh\u00e0 cung c\u1ea5p l\u1edbn nh\u01b0 Cisco Systems v\u00e0 Arista Networks \u0111\u00e3 \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c thi\u1ebft b\u1ecb quang l\u1edbp ER4 trong h\u1ec7 sinh th\u00e1i s\u1ea3n ph\u1ea9m 40G c\u1ee7a h\u1ecd. \u0110\u1ed3ng th\u1eddi, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb quang t\u01b0\u01a1ng th\u00edch b\u00ean th\u1ee9 ba nh\u01b0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\">LINK-PP<\/a> c\u0169ng cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c nh\u1eb1m gi\u1ea3m chi ph\u00ed tri\u1ec3n khai m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c n\u1ec1n t\u1ea3ng chuy\u1ec3n m\u1ea1ch ph\u1ed5 bi\u1ebfn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u00fap k\u1ef9 s\u01b0 m\u1ea1ng, \u0111\u1ed9i ng\u0169 mua s\u1eafm v\u00e0 ki\u1ebfn tr\u00fac s\u01b0 CNTT nhanh ch\u00f3ng hi\u1ec3u r\u00f5 40GBASE-ER4 l\u00e0 g\u00ec, v\u1ecb tr\u00ed c\u1ee7a n\u00f3 trong ng\u0103n x\u1ebfp m\u1ea1ng v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn module t\u01b0\u01a1ng th\u00edch ph\u00f9 h\u1ee3p cho vi\u1ec7c tri\u1ec3n khai 40G \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 40GBASE-ER4 l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n Ethernet 40 Gigabit <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472717.htm\">c\u00e1c module QSFP+<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u1edf kho\u1ea3ng c\u00e1ch xa tr\u00ean s\u1ee3i quang \u0111\u01a1n mode, th\u01b0\u1eddng h\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft l\u00ean t\u1edbi kho\u1ea3ng 40 km.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111\u00e2y l\u00e0 m\u1ed9t module quang d\u1ea1ng c\u1eafm v\u00e0o <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473105.htm\">module quang s\u1ee3i<\/a> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao \u0111\u1ec3 truy\u1ec1n t\u00edn hi\u1ec7u Ethernet 40G gi\u1eefa hai \u0111\u1ecba \u0111i\u1ec3m c\u00e1ch xa nhau b\u1eb1ng s\u1ee3i quang \u0111\u01a1n mode duplex (SMF).<\/p>\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\/ff951fad2c904bb3945f446a905989e3.jpg\" alt=\"What Is 40GBASE-ER4?\" class=\"wp-image-2756\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff951fad2c904bb3945f446a905989e3.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff951fad2c904bb3945f446a905989e3-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff951fad2c904bb3945f446a905989e3-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff951fad2c904bb3945f446a905989e3-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ff951fad2c904bb3945f446a905989e3-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ecbnh ngh\u0129a QSFP+<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">QSFP+ (Quad Small Form-factor Pluggable Plus) l\u00e0 m\u1ed9t d\u1ea1ng thu ph\u00e1t quang nh\u1ecf g\u1ecdn, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473101.htm\">c\u00f3 th\u1ec3 thay th\u1ebf n\u00f3ng<\/a> \u0111\u01b0\u1ee3c d\u00f9ng cho m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao.<br>N\u00f3 h\u1ed7 tr\u1ee3 4 k\u00eanh d\u1eef li\u1ec7u \u0111\u1ed9c l\u1eadp, m\u1ed7i k\u00eanh th\u01b0\u1eddng mang l\u01b0u l\u01b0\u1ee3ng 10G, k\u1ebft h\u1ee3p l\u1ea1i \u0111\u1ec3 \u0111\u1ea1t t\u1ed5ng c\u00f4ng su\u1ea5t 40G.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tr\u01b0\u1eddng h\u1ee3p 40GBASE-ER4, module QSFP+ s\u1eed d\u1ee5ng b\u1ed1n b\u01b0\u1edbc s\u00f3ng (c\u00f4ng ngh\u1ec7 WDM) thay v\u00ec b\u1ed1n s\u1ee3i quang v\u1eadt l\u00fd ri\u00eang bi\u1ec7t, cho ph\u00e9p truy\u1ec1n d\u1eabn hi\u1ec7u qu\u1ea3 \u1edf kho\u1ea3ng c\u00e1ch xa tr\u00ean m\u1ed9t li\u00ean k\u1ebft SMF duplex ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n v\u1ec1 40GBASE-ER4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 hi\u1ec3u nhanh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>40GBASE<\/strong> \u2192 ti\u00eau chu\u1ea9n Ethernet 40 Gigabit<\/p><\/li>\n\n\n\n<li><p><strong>ER<\/strong> \u2192 T\u1ea7m xa m\u1edf r\u1ed9ng (truy\u1ec1n d\u1eabn \u1edf kho\u1ea3ng c\u00e1ch xa)<\/p><\/li>\n\n\n\n<li><p><strong>4<\/strong> \u2192 B\u1ed1n k\u00eanh quang s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 WDM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 v\u1eady, 40GBASE-ER4 v\u1ec1 c\u01a1 b\u1ea3n c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/www.l-p.com\/products\/472719.htm\" target=\"_self\">module quang 40G<\/a> c\u00f3 kh\u1ea3 n\u0103ng g\u1eedi d\u1eef li\u1ec7u \u1edf kho\u1ea3ng c\u00e1ch xa b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed1n t\u00edn hi\u1ec7u quang k\u1ebft h\u1ee3p tr\u00ean s\u1ee3i quang \u0111\u01a1n mode.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">V\u1ecb tr\u00ed th\u1ef1c t\u1ebf trong m\u1ea1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, 40GBASE-ER4 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft n\u1ed9i b\u1ed9 trung t\u00e2m d\u1eef li\u1ec7u (DCI)<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft m\u1ea1ng khu v\u1ef1c \u0111\u00f4 th\u1ecb<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng doanh nghi\u1ec7p \u1edf kho\u1ea3ng c\u00e1ch xa<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai trong c\u00e1c m\u00f4i tr\u01b0\u1eddng chuy\u1ec3n m\u1ea1ch hi\u1ec7u n\u0103ng cao t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p nh\u01b0 Cisco Systems v\u00e0 Arista Networks, n\u01a1i y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i quang \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 t\u1ea7m xa c\u1ee7a 40GBASE-ER4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c truy\u1ec1n d\u1eabn Ethernet 40G \u1edf kho\u1ea3ng c\u00e1ch xa tr\u00ean <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/single-mode-fiber-os1-vs-os2-comparison-indoor-outdoor-use\/\">s\u1ee3i quang \u0111\u01a1n mode<\/a>, v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 li\u00ean k\u1ebft gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u, n\u01a1i kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft v\u00e0 ng\u00e2n s\u00e1ch quang l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/p>\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\/eb618ef17eff43ef84a18f2b8f3a9d7c.jpg\" alt=\"40GBASE-ER4 Specifications and Reach\" class=\"wp-image-2757\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb618ef17eff43ef84a18f2b8f3a9d7c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb618ef17eff43ef84a18f2b8f3a9d7c-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb618ef17eff43ef84a18f2b8f3a9d7c-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb618ef17eff43ef84a18f2b8f3a9d7c-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/eb618ef17eff43ef84a18f2b8f3a9d7c-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ed5ng quan c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 228px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Danh m\u1ee5c<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Ti\u00eau chu\u1ea9n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40GBASE-ER4 (Ethernet 40 Gigabit)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>H\u1ec7 s\u1ed1 d\u1ea1ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>QSFP+ (B\u1ed9 n\u1ed1i nh\u1ecf d\u1ea1ng b\u1ed1n c\u1ed5ng c\u00f3 th\u1ec3 c\u1eafm th\u00e1o \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n n\u00e2ng cao)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>25Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40Gbps (4 k\u00eanh \u00d7 10Gbps)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>C\u00f4ng ngh\u1ec7 truy\u1ec1n d\u1eabn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110a h\u1ee3p ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (WDM)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111\u01a1n mode (SMF, khuy\u1ebfn ngh\u1ecb G.652)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Lo\u1ea1i \u0111\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-duplex-lc-connector-explained\/\">\u0110\u1ea7u n\u1ed1i LC hai chi\u1ec1u (Duplex LC)<br><\/a><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>B\u01b0\u1edbc s\u00f3ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 b\u01b0\u1edbc s\u00f3ng trong d\u1ea3i 1310 nm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>T\u1ea7m xa t\u1ed1i \u0111a<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean \u0111\u1ebfn 40 km<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft n\u1ed9i b\u1ed9 trung t\u00e2m d\u1eef li\u1ec7u, m\u1ea1ng \u0111\u00f4 th\u1ecb, m\u1ea1ng l\u00f5i doanh nghi\u1ec7p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>Lo\u1ea1i li\u00ean k\u1ebft<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft quang \u0111i\u1ec3m-\u0111i\u1ec3m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>\u0110\u00fap-l\u00ea\/\u0110\u01a1n c\u00f4ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Duplex (c\u1eb7p Tx\/Rx)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"228\"><p>T\u01b0\u01a1ng th\u00edch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ed5ng Ethernet 40G QSFP+ (ph\u1ee5 thu\u1ed9c nh\u00e0 cung c\u1ea5p, v\u00ed d\u1ee5: n\u1ec1n t\u1ea3ng Cisco\/Arista)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng gi\u1ea3i ph\u00e1p <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26153-40g-qsfp.htm\">QSFP+ 40G<\/a> c\u00f3 t\u1ea7m xa nh\u1ea5t \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong m\u1ea1ng doanh nghi\u1ec7p v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Lo\u1ea1i s\u1ee3i: t\u1ea1i sao b\u1eaft bu\u1ed9c ph\u1ea3i d\u00f9ng s\u1ee3i quang \u0111\u01a1n mode<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nghi\u00eam ng\u1eb7t cho m\u00f4i tr\u01b0\u1eddng s\u1ee3i quang \u0111\u01a1n mode (SMF). Kh\u00e1c v\u1edbi s\u1ee3i quang \u0111a mode (MMF), SMF c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u00f5i nh\u1ecf h\u01a1n nhi\u1ec1u, gi\u00fap gi\u1ea3m t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 v\u00e0 cho ph\u00e9p t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng truy\u1ec1n \u0111i kho\u1ea3ng c\u00e1ch r\u1ea5t xa v\u1edbi t\u1ed5n hao t\u1ed1i thi\u1ec3u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do thi\u1ebft k\u1ebf n\u00e0y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u00f3 kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean s\u1ee3i quang \u0111a mode (<a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fiber-optic-cable-om3-vs-om4\/\" target=\"_blank\" rel=\"\">OM3\/OM4<\/a>)<\/p><\/li>\n\n\n\n<li><p>N\u00f3 y\u00eau c\u1ea7u m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn quang s\u1ea1ch v\u00e0 t\u1ed5n hao th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>N\u00f3 ph\u00f9 h\u1ee3p nh\u1ea5t cho h\u1ec7 th\u1ed1ng c\u00e1p c\u00f3 c\u1ea5u tr\u00fac \u1edf kho\u1ea3ng c\u00e1ch xa ho\u1eb7c h\u1ea1 t\u1ea7ng vi\u1ec5n th\u00f4ng \u0111\u1ea1t chu\u1ea9n<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Lo\u1ea1i \u0111\u1ea7u n\u1ed1i: giao di\u1ec7n LC duplex<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Module s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i LC duplex, \u0111\u00e2y l\u00e0 ti\u00eau chu\u1ea9n ng\u00e0nh cho m\u1ea1ng quang m\u1eadt \u0111\u1ed9 cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t s\u1ee3i d\u00f9ng \u0111\u1ec3 truy\u1ec1n (Tx)<\/p><\/li>\n\n\n\n<li><p>M\u1ed9t s\u1ee3i d\u00f9ng \u0111\u1ec3 nh\u1eadn (Rx)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 s\u1eed d\u1ee5ng WDM n\u1ed9i b\u1ed9 (4 b\u01b0\u1edbc s\u00f3ng), giao di\u1ec7n b\u00ean ngo\u00e0i v\u1eabn ch\u1ec9 l\u00e0 k\u1ebft n\u1ed1i LC duplex \u0111\u01a1n gi\u1ea3n, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c tri\u1ec3n khai v\u00e0 thi\u1ebft k\u1ebf c\u00e1p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea7m xa v\u00e0 kho\u1ea3ng c\u00e1ch tri\u1ec3n khai<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a 40GBASE-ER4 l\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng t\u1ea7m xa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>T\u1ea7m xa ti\u00eau chu\u1ea9n:<\/strong> l\u00ean t\u1edbi ~40 km tr\u00ean SMF<\/p><\/li>\n\n\n\n<li><p><strong>Ph\u1ea1m vi tri\u1ec3n khai th\u1ef1c t\u1ebf \u0111i\u1ec3n h\u00ecnh:<\/strong> t\u1eeb 10 km \u0111\u1ebfn 40 km (t\u00f9y thu\u1ed9c v\u00e0o ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 suy hao)<\/p><\/li>\n\n\n\n<li><p><strong>\u0110\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho:<\/strong> c\u00e1c li\u00ean k\u1ebft \u0111i\u1ec3m-\u0111i\u1ec3m \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb m\u1ea1ng h\u00e0ng \u0111\u1ea7u nh\u01b0 Cisco Systems v\u00e0 Arista Networks nh\u1ea5t qu\u00e1n ph\u00e2n lo\u1ea1i ER4 l\u00e0 b\u1ed9 thu ph\u00e1t quang l\u1edbp 40 km, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho k\u1ebft n\u1ed1i \u0111\u00f4 th\u1ecb (metro) v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u (DCI).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t khi tri\u1ec3n khai th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 ER4 \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho kho\u1ea3ng c\u00e1ch xa, hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5ng t\u1ed5n hao quang h\u1ecdc (suy hao s\u1ee3i quang + \u0111\u1ea7u n\u1ed1i + m\u1ed1i n\u1ed1i)<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (G.652 so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 h\u01a1n)<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a khu\u1ebfch \u0111\u1ea1i quang h\u1ecdc (n\u1ebfu c\u1ea7n trong c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n m\u1edf r\u1ed9ng)<\/p><\/li>\n\n\n\n<li><p>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi n\u1ec1n t\u1ea3ng chuy\u1ec3n m\u1ea1ch v\u00e0 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang h\u1ecdc<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt, ER4 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i nh\u1eefng n\u01a1i c\u00f3 \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c \u0111i\u1ec3m, lo\u1ea1i b\u1ecf nhu c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u trung gian.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng 40GBASE-ER4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473106.htm\">40G-ER4<\/a> kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u1ed9 thu ph\u00e1t quang ng\u1eafn kho\u1ea3ng c\u00e1ch d\u00f9ng chung trong trung t\u00e2m d\u1eef li\u1ec7u. N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c k\u1ebft n\u1ed1i 40G b\u0103ng th\u00f4ng cao \u1edf kho\u1ea3ng c\u00e1ch xa, n\u01a1i \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i quang ph\u1ea3i v\u01b0\u1ee3t xa gi\u1edbi h\u1ea1n th\u00f4ng th\u01b0\u1eddng c\u1ee7a c\u00e1c module SR4 ho\u1eb7c LR4. Nh\u1edd kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 l\u00ean \u0111\u1ebfn 40 km tr\u00ean s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n, n\u00f3 \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong c\u00e1c m\u00f4i tr\u01b0\u1eddng x\u01b0\u01a1ng s\u1ed1ng c\u1ea5p nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 v\u00e0 doanh nghi\u1ec7p.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a.jpg\" alt=\" Where 40GBASE-ER4 Is Used\" class=\"wp-image-2758\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c1d194d4f354954a80c08b0477acf1a-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u (DCI)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a 40GBASE-ER4 l\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/data-center-interconnect-definition-benefits-and-role-of-optical-modules\/\">K\u1ebft n\u1ed1i li\u00ean trung t\u00e2m d\u1eef li\u1ec7u<\/a> (DCI).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c t\u00ecnh hu\u1ed1ng n\u00e0y, c\u00e1c t\u1ed5 ch\u1ee9c k\u1ebft n\u1ed1i hai trung t\u00e2m d\u1eef li\u1ec7u ri\u00eang bi\u1ec7t n\u1eb1m \u1edf c\u00e1c t\u00f2a nh\u00e0, khu\u00f4n vi\u00ean ho\u1eb7c th\u1eadm ch\u00ed c\u00e1c th\u00e0nh ph\u1ed1 kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c y\u00eau c\u1ea7u \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u0103ng th\u00f4ng cao (l\u01b0u l\u01b0\u1ee3ng t\u1ed5ng h\u1ee3p 40G)<\/p><\/li>\n\n\n\n<li><p>Truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 tr\u1ec5 th\u1ea5p <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/point-to-point-network-architecture-guide\/\" target=\"_blank\" rel=\"\">\u0110i\u1ec3m-\u0111\u1ebfn-\u0111i\u1ec3m<\/a> li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n \u0111\u00e1ng tin c\u1eady<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 r\u1ea5t ph\u00f9 h\u1ee3p \u1edf \u0111\u00e2y v\u00ec n\u00f3 c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u \u1edf kho\u1ea3ng c\u00e1ch xa m\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft b\u1ecb t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u trung gian, gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed cho k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp gi\u1eefa c\u00e1c \u0111i\u1ec3m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y \u0111\u1eb7c bi\u1ec7t ph\u1ed5 bi\u1ebfn trong c\u00e1c tri\u1ec3n khai quy m\u00f4 l\u1edbn t\u1eeb c\u00e1c h\u1ec7 sinh th\u00e1i m\u1ea1ng nh\u01b0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472717.htm\">Cisco Systems<\/a> and <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472719.htm\">Arista Networks<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng m\u1ea1ng khu\u00f4n vi\u00ean<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t t\u00ecnh hu\u1ed1ng tri\u1ec3n khai quan tr\u1ecdng kh\u00e1c l\u00e0 m\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng doanh nghi\u1ec7p quy m\u00f4 l\u1edbn trong khu\u00f4n vi\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i c\u00e1c tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc, c\u01a1 s\u1edf ch\u00ednh ph\u1ee7, b\u1ec7nh vi\u1ec7n v\u00e0 khu\u00f4n vi\u00ean doanh nghi\u1ec7p, c\u00e1c n\u00fat m\u1ea1ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 tr\u00ean nhi\u1ec1u t\u00f2a nh\u00e0 c\u00e1ch nhau t\u1eeb v\u00e0i tr\u0103m m\u00e9t \u0111\u1ebfn v\u00e0i kil\u00f4m\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c switch l\u00f5i<\/p><\/li>\n\n\n\n<li><p>X\u01b0\u01a1ng s\u1ed1ng s\u1ee3i quang gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft l\u00ean (uplinks) \u1edf l\u1edbp t\u1eadp h\u1ee3p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch xa c\u1ee7a n\u00f3 khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p cho c\u00e1c khu\u00f4n vi\u00ean n\u01a1i c\u00e1c b\u1ed9 thu ph\u00e1t quang \u0111a ch\u1ebf \u0111\u1ed9 ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 bao ph\u1ee7 kho\u1ea3ng c\u00e1ch y\u00eau c\u1ea7u m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1ea1ng v\u1eadn chuy\u1ec3n \u0111\u00f4 th\u1ecb v\u00e0 v\u00f9ng mi\u1ec1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ng Ethernet \u0111\u00f4 th\u1ecb v\u00e0 m\u1ea1ng v\u1eadn chuy\u1ec3n v\u00f9ng mi\u1ec1n, n\u01a1i c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 v\u00e0 doanh nghi\u1ec7p l\u1edbn c\u1ea7n k\u1ebft n\u1ed1i c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng tr\u00ean to\u00e0n th\u00e0nh ph\u1ed1 ho\u1eb7c khu v\u1ef1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea1ng t\u1eadp h\u1ee3p \u0111\u00f4 th\u1ecb (Metro aggregation networks)<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i bi\u00ean c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5<\/p><\/li>\n\n\n\n<li><p>Doanh nghi\u1ec7p v\u1eadn chuy\u1ec3n xa <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-wide-area-network\/\" target=\"_blank\" rel=\"\">WAN<\/a> m\u1edf r\u1ed9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec h\u1ed7 tr\u1ee3 truy\u1ec1n d\u1eabn kho\u1ea3ng c\u00e1ch xa tr\u00ean s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF), ER4 l\u00e0m gi\u1ea3m nhu c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb t\u00e1i t\u1ea1o quang h\u1ecdc \u0111\u1eaft ti\u1ec1n t\u1ea1i c\u00e1c n\u00fat trung gian.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Li\u00ean k\u1ebft WAN doanh nghi\u1ec7p v\u00e0 li\u00ean k\u1ebft ph\u1ee5c h\u1ed3i sau th\u1ea3m h\u1ecda<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u doanh nghi\u1ec7p s\u1eed d\u1ee5ng 40GBASE-ER4 cho c\u00e1c li\u00ean k\u1ebft ph\u1ee5c h\u1ed3i sau th\u1ea3m h\u1ecda (DR) v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c kinh doanh gi\u1eefa c\u00e1c \u0111\u1ecba \u0111i\u1ec3m c\u00e1ch xa nhau v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nh\u00e2n b\u1ea3n d\u1eef li\u1ec7u quan tr\u1ecdng gi\u1eefa trung t\u00e2m d\u1eef li\u1ec7u ch\u00ednh v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng<\/p><\/li>\n\n\n\n<li><p>Duy tr\u00ec \u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian th\u1ef1c ho\u1eb7c g\u1ea7n th\u1eddi gian th\u1ef1c<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o s\u1eb5n s\u00e0ng chuy\u1ec3n \u0111\u1ed5i sang h\u1ec7 th\u1ed1ng d\u1ef1 ph\u00f2ng khi x\u1ea3y ra s\u1ef1 c\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 kho\u1ea3ng c\u00e1ch xa c\u1ee7a ER4 khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng tr\u1ecdng y\u1ebfu, n\u01a1i th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng l\u00e0 kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Khi n\u00e0o n\u00ean ch\u1ecdn ER4<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n ti\u00eau chu\u1ea9n c\u1ee7a LR4<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai<\/p><\/li>\n\n\n\n<li><p>Y\u00eau c\u1ea7u m\u1ed9t li\u00ean k\u1ebft quang h\u1ecdc \u0111i\u1ec3m-\u0111\u1ebfn-\u0111i\u1ec3m tr\u1ef1c ti\u1ebfp<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 tin c\u1eady cao tr\u00ean kho\u1ea3ng c\u00e1ch xa l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i ng\u1eafn g\u1ecdn, \u0111\u00e2y l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p 40G chuy\u00ean bi\u1ec7t cho kho\u1ea3ng c\u00e1ch xa, d\u00e0nh cho k\u1ebft n\u1ed1i c\u1ea5p x\u01b0\u01a1ng s\u1ed1ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ed9 thu ph\u00e1t quang truy c\u1eadp trung t\u00e2m d\u1eef li\u1ec7u th\u00f4ng th\u01b0\u1eddng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Danh s\u00e1ch ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a 40GBASE-ER4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi tri\u1ec3n khai m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472810.htm\">module QSFP+ ER4<\/a> vi\u1ec7c x\u00e1c minh kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch l\u00e0 r\u1ea5t quan tr\u1ecdng. Kh\u00e1c v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t quang kho\u1ea3ng c\u00e1ch ng\u1eafn, ER4 ho\u1ea1t \u0111\u1ed9ng \u1edf kho\u1ea3ng c\u00e1ch xa v\u00e0 c\u00f3 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang h\u1ecdc cao h\u01a1n, ngh\u0129a l\u00e0 vi\u1ec7c tri\u1ec3n khai sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft, qu\u00e1 t\u1ea3i b\u1ed9 thu ho\u1eb7c ho\u00e0n to\u00e0n kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u1ed5ng chuy\u1ec3n m\u1ea1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n n\u00e0y cung c\u1ea5p danh s\u00e1ch ki\u1ec3m tra th\u1ef1c t\u1ebf bao g\u1ed3m h\u1ed7 tr\u1ee3 chuy\u1ec3n m\u1ea1ch, h\u1ea1n ch\u1ebf c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\">DOM<\/a> gi\u00e1m s\u00e1t, y\u00eau c\u1ea7u suy hao v\u00e0 m\u1ee9c \u0111\u1ed9 s\u1eb5n s\u00e0ng c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6.jpg\" alt=\"40GBASE-ER4 Compatibility Checklist\" class=\"wp-image-2759\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7a1786b5cef94af3a8dc06bfb4d3e0e6-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u25c6 H\u1ed7 tr\u1ee3 chuy\u1ec3n m\u1ea1ch v\u00e0 n\u1ec1n t\u1ea3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 x\u00e1c minh xem chuy\u1ec3n m\u1ea1ch c\u1ee7a b\u1ea1n c\u00f3 h\u1ed7 tr\u1ee3 quang h\u1ecdc 40G QSFP+ <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473107.htm\">ER4 hay kh\u00f4ng<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n c\u00e2n nh\u1eafc bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u1ea3 n\u0103ng s\u1eb5n c\u00f3 c\u1ed5ng QSFP+ 40G (kh\u00f4ng ph\u1ea3i ch\u1ec9 c\u00e1c c\u1ed5ng QSFP28)<\/p><\/li>\n\n\n\n<li><p>Danh s\u00e1ch t\u01b0\u01a1ng th\u00edch quang h\u1ecdc c\u1ee5 th\u1ec3 theo nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 firmware cho quang h\u1ecdc ER4<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi 40GBASE-ER4 trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u1ec1n t\u1ea3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ea5p doanh nghi\u1ec7p nh\u01b0 Cisco Systems v\u00e0 Arista Networks th\u01b0\u1eddng duy tr\u00ec ma tr\u1eadn t\u01b0\u01a1ng th\u00edch quang h\u1ecdc nghi\u00eam ng\u1eb7t, ngh\u0129a l\u00e0 kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c module QSFP+ \u0111\u1ec1u \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn t\u1ef1 \u0111\u1ed9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25c6 Kh\u00f3a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c tri\u1ec3n khai ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 kh\u00f3a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 ba t\u00ecnh hu\u1ed1ng t\u01b0\u01a1ng th\u00edch \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u1ed5ng m\u1edf ho\u00e0n to\u00e0n:<\/strong> ch\u1ea5p nh\u1eadn h\u1ea7u h\u1ebft c\u00e1c quang h\u1ecdc QSFP+ tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n MSA<\/p><\/li>\n\n\n\n<li><p><strong>C\u1ed5ng b\u1ecb h\u1ea1n ch\u1ebf m\u1ed9t ph\u1ea7n:<\/strong> y\u00eau c\u1ea7u quang h\u1ecdc \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a ho\u1eb7c \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c<\/p><\/li>\n\n\n\n<li><p><strong>H\u1ec7 th\u1ed1ng b\u1ecb kh\u00f3a ho\u00e0n to\u00e0n:<\/strong> ch\u1ec9 ch\u1ea5p nh\u1eadn b\u1ed9 thu ph\u00e1t c\u00f3 th\u01b0\u01a1ng hi\u1ec7u OEM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi 40GBASE-ER4, vi\u1ec7c x\u00e1c minh c\u00e1c y\u1ebfu t\u1ed1 sau l\u00e0 b\u1eaft bu\u1ed9c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u01b0\u01a1ng th\u00edch OEM (Cisco \/ Arista \/ <a href=\"https:\/\/www.l-p.com\/products\/472718.htm\" target=\"_blank\" rel=\"\">Juniper<br><\/a>, v.v.)<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 b\u00ean th\u1ee9 ba (quang h\u1ecdc MSA \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a ho\u1eb7c chung chung)<\/p><\/li>\n\n\n\n<li><p>C\u00e1c h\u1ec7 qu\u1ea3 v\u1ec1 b\u1ea3o h\u00e0nh khi s\u1eed d\u1ee5ng module kh\u00f4ng ph\u1ea3i OEM<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u25c6 H\u1ed7 tr\u1ee3 DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module 40GBASE-ER4 hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng h\u1ed7 tr\u1ee3 DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1), cho ph\u00e9p theo d\u00f5i th\u1eddi gian th\u1ef1c c\u00e1c th\u00f4ng s\u1ed1 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang ph\u00e1t (Tx)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang nh\u1eadn (Rx)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p<\/p><\/li>\n\n\n\n<li><p>D\u00f2ng ph\u00e2n c\u1ef1c laser<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">DOM \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi ER4 v\u00ec:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u00fap ph\u00e1t hi\u1ec7n t\u00ecnh tr\u1ea1ng qu\u00e1 c\u00f4ng su\u1ea5t ho\u1eb7c thi\u1ebfu c\u00f4ng su\u1ea5t<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i<\/p><\/li>\n\n\n\n<li><p>\u0110\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c x\u1eed l\u00fd s\u1ef1 c\u1ed1 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111\u00f4 th\u1ecb v\u00e0 DCI<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebfu kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb DOM khi\u1ebfn vi\u1ec7c ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 quang tr\u00ean kho\u1ea3ng c\u00e1ch xa tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u25c6 Y\u00eau c\u1ea7u suy hao quang (quan tr\u1ecdng \u0111\u1ed1i v\u1edbi ER4)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c v\u1edbi c\u00e1c module quang t\u1ea7m ng\u1eafn, 40GBASE-ER4 c\u00f3 c\u00f4ng su\u1ea5t ph\u00e1t r\u1ea5t cao, c\u00f3 th\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i b\u1ed9 thu tr\u00ean c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n ng\u1eafn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo h\u01b0\u1edbng d\u1eabn tri\u1ec3n khai \u0111\u01b0\u1ee3c tr\u00edch d\u1eabn trong t\u00e0i li\u1ec7u nh\u00e0 cung c\u1ea5p t\u1eeb Arista Networks, vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 suy hao quang <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/attenuation-in-optical-transceiver-management-and-solutions\/\">suy hao<\/a> l\u00e0 b\u1eaft bu\u1ed9c trong c\u00e1c t\u00ecnh hu\u1ed1ng kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u1eb1m b\u1ea3o v\u1ec7 b\u1ed9 thu kh\u1ecfi hi\u1ec7n t\u01b0\u1ee3ng b\u00e3o h\u00f2a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>ER4 KH\u00d4NG ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n ng\u1eafn (v\u00ed d\u1ee5: &lt; 2 km) n\u1ebfu kh\u00f4ng c\u00f3 suy hao<\/p><\/li>\n\n\n\n<li><p>C\u00f3 th\u1ec3 c\u1ea7n b\u1ed9 suy hao quang n\u1ed1i ti\u1ebfp<\/p><\/li>\n\n\n\n<li><p>Ph\u1ea3i t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi tri\u1ec3n khai<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c kh\u00f4ng \u00e1p d\u1ee5ng suy hao c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Qu\u00e1 t\u1ea3i b\u1ed9 thu<\/p><\/li>\n\n\n\n<li><p>Cao<br> <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\" target=\"_blank\" rel=\"\">t\u1ef7 l\u1ec7 l\u1ed7i bit<br><\/a> (BER)<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c dao \u0111\u1ed9ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u25c6 Y\u00eau c\u1ea7u v\u1ec1 h\u1ec7 th\u1ed1ng c\u00e1p quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 y\u00eau c\u1ea7u c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang \u0111\u01a1n mode ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Danh s\u00e1ch ki\u1ec3m tra s\u1eb5n s\u00e0ng c\u00e1p quang:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i c\u00e1p quang \u0111\u01a1n mode: ITU-T G.652 ho\u1eb7c t\u1ed1t h\u01a1n<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i LC duplex s\u1ea1ch (\u0111\u1ed9 <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-insertion-loss-definition-impact\/\" target=\"_blank\" rel=\"\">t\u1ed5n hao ch\u00e8n<\/a>)<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n \u0111\u1ea1t chu\u1ea9n (t\u1ed5n th\u1ea5t ph\u1ea3n x\u1ea1 t\u1ed1i thi\u1ec3u)<\/p><\/li>\n\n\n\n<li><p>Ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ea7u cu\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 \u0111o\u1ea1n c\u00e1p \u0111a mode xen k\u1ebd (ER4 KH\u00d4NG t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1p \u0111a mode)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, tu\u1ed5i th\u1ecd c\u00e1p quang, t\u1ed5n th\u1ea5t do u\u1ed1n cong v\u00e0 nhi\u1ec5m b\u1ea9n \u0111\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn hi\u1ec7u n\u0103ng tr\u00ean kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi tri\u1ec3n khai, h\u00e3y x\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u2714 B\u1ed9 chuy\u1ec3n m\u1ea1ch h\u1ed7 tr\u1ee3 quang h\u1ecdc QSFP+ ER4<\/p><\/li>\n\n\n\n<li><p>\u2714 \u0110\u00e3 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch nh\u00e0 cung c\u1ea5p (OEM ho\u1eb7c MSA \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a)<\/p><\/li>\n\n\n\n<li><p>\u2714 Gi\u00e1m s\u00e1t DOM kh\u1ea3 d\u1ee5ng<\/p><\/li>\n\n\n\n<li><p>\u2714 \u0110\u00e3 s\u1eed d\u1ee5ng suy hao quang cho c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n ng\u1eafn<\/p><\/li>\n\n\n\n<li><p>\u2714 Nh\u00e0 m\u00e1y s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n l\u00e0 s\u1ea1ch v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn \u0111\u00fang c\u00e1ch<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 40GBASE-ER4 so v\u1edbi LR4 so v\u1edbi SR4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi l\u1ef1a ch\u1ecdn m\u1ed9t <strong>m\u00f4-\u0111un quang h\u1ecdc 40G QSFP+<\/strong>, m\u1ed9t trong nh\u1eefng \u0111i\u1ec3m ra quy\u1ebft \u0111\u1ecbnh ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 l\u1ef1a ch\u1ecdn gi\u1eefa <strong>SR4, LR4 v\u00e0 ER4<\/strong>. M\u1eb7c d\u00f9 c\u1ea3 ba \u0111\u1ec1u h\u1ed7 tr\u1ee3 Ethernet 40 Gigabit, ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn, lo\u1ea1i c\u00e1p quang v\u00e0 m\u00f4i tr\u01b0\u1eddng tri\u1ec3n khai r\u1ea5t kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf m\u1ea1ng hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05.jpg\" alt=\"40GBASE-ER4 vs. LR4 vs. SR4\" class=\"wp-image-2760\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/21fef26d94be4b86b0e1767423b83e05-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ed5ng quan so s\u00e1nh nhanh<\/h3>\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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482749.htm\"><strong>40GBASE-SR4<\/strong><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang \u0111a mode (OM3\/OM4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~100 m\u2013150 m<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u t\u1ea7m ng\u1eafn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482487.htm\"><strong>40GBASE-LR4<\/strong><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~10 km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft khu\u00f4n vi\u00ean v\u00e0 \u0111\u00f4 th\u1ecb<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473095.htm\"><strong>40GBASE-ER4<\/strong><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean \u0111\u1ebfn ~40 km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u (DCI) v\u00e0 m\u1ea1ng l\u00f5i t\u1ea7m xa<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">40GBASE-SR4: B\u1ed9 quang t\u1ea7m ng\u1eafn cho trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SR4 (T\u1ea7m ng\u1eafn) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u00f4i tr\u01b0\u1eddng trung t\u00e2m d\u1eef li\u1ec7u m\u1eadt \u0111\u1ed9 cao, n\u01a1i c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1eb7t g\u1ea7n nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u c\u1eb7p m\u00f4-\u0111un c\u00f3 b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u00e1p quang \u0111a mode (OM3\/OM4)<\/p><\/li>\n\n\n\n<li><p>Chi ph\u00ed r\u1ea5t th\u1ea5p tr\u00ean m\u1ed7i li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>T\u1ea7m ng\u1eafn (~100\u2013150 m\u00e9t)<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng quang h\u1ecdc song song (th\u01b0\u1eddng l\u00e0 \u0111\u1ea7u n\u1ed1i MPO\/MTP)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00f9 h\u1ee3p nh\u1ea5t cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c gi\u00e1 rack<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-tor-top-of-rack-switch\/\" target=\"_blank\" rel=\"\">Tr\u00ean c\u00f9ng m\u1ed9t rack<\/a> T\u1eeb b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ea7u t\u1ee7 (ToR) \u0111\u1ebfn b\u1ed9 chuy\u1ec3n m\u1ea1ch spine<\/p><\/li>\n\n\n\n<li><p>Chuy\u1ec3n m\u1ea1ch trung t\u00e2m d\u1eef li\u1ec7u m\u1eadt \u0111\u1ed9 cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea1n ch\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng ph\u00f9 h\u1ee3p cho truy\u1ec1n d\u1eabn t\u1ea7m xa ho\u1eb7c m\u1ea1ng khu\u00f4n vi\u00ean<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">40GBASE-LR4: Gi\u1ea3i ph\u00e1p s\u1ee3i \u0111\u01a1n t\u1ea7m trung<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LR4 (T\u1ea7m xa)<\/strong> l\u00e0 b\u1ed9 quang 40G s\u1ee3i \u0111\u01a1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t cho m\u1ea1ng doanh nghi\u1ec7p v\u00e0 m\u1ea1ng \u0111\u00f4 th\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u c\u1eb7p m\u00f4-\u0111un c\u00f3 b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u00e1p quang \u0111\u01a1n mode (SMF)<\/p><\/li>\n\n\n\n<li><p>Ph\u1ea1m vi l\u00ean \u0111\u1ebfn 10 km<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 WDM tr\u00ean \u0111\u1ea7u n\u1ed1i LC duplex<\/p><\/li>\n\n\n\n<li><p>C\u00e2n b\u1eb1ng gi\u1eefa chi ph\u00ed v\u00e0 hi\u1ec7u n\u0103ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00f9 h\u1ee3p nh\u1ea5t cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng trong khu\u00f4n vi\u00ean<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft \u0111\u00f4 th\u1ecb ng\u1eafn<\/p><\/li>\n\n\n\n<li><p>K\u1ebft n\u1ed1i gi\u1eefa c\u00e1c t\u00f2a nh\u00e0 trong doanh nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">LR4 th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh khi kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a c\u00e1p quang \u0111a mode nh\u01b0ng kh\u00f4ng y\u00eau c\u1ea7u ph\u1ea1m vi c\u1ef1c xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">40GBASE-ER4: B\u1ed9 quang l\u00f5i t\u1ea7m m\u1edf r\u1ed9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ER4 (T\u1ea7m m\u1edf r\u1ed9ng)<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7m xa \u0111\u00f2i h\u1ecfi kh\u1eaft khe nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u c\u1eb7p m\u00f4-\u0111un c\u00f3 b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u00e1p quang \u0111\u01a1n mode (SMF)<\/p><\/li>\n\n\n\n<li><p>Ph\u1ea1m vi l\u00ean \u0111\u1ebfn 40 km<\/p><\/li>\n\n\n\n<li><p>Truy\u1ec1n d\u1eabn d\u1ef1a tr\u00ean WDM (4 k\u00eanh 10G)<\/p><\/li>\n\n\n\n<li><p>Giao di\u1ec7n \u0111\u1ea7u n\u1ed1i LC duplex<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00f9 h\u1ee3p nh\u1ea5t cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u (DCI)<\/p><\/li>\n\n\n\n<li><p>M\u1ea1ng t\u1eadp h\u1ee3p \u0111\u00f4 th\u1ecb (Metro aggregation networks)<\/p><\/li>\n\n\n\n<li><p>Li\u00ean k\u1ebft WAN doanh nghi\u1ec7p t\u1ea7m xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">So v\u1edbi LR4, ER4 cung c\u1ea5p ph\u1ea1m vi g\u1ea5p 4 l\u1ea7n, khi\u1ebfn n\u00f3 l\u00fd t\u01b0\u1edfng cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ph\u00e2n b\u1ed1 \u0111\u1ecba l\u00fd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb m\u1ea1ng doanh nghi\u1ec7p nh\u01b0 Arista Networks ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng c\u00e1c b\u1ed9 quang n\u00e0y d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch truy\u1ec1n v\u00e0 c\u1ea5p \u1ee9ng d\u1ee5ng nh\u1eb1m \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c ra quy\u1ebft \u0111\u1ecbnh tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Logic ra quy\u1ebft \u0111\u1ecbnh ch\u00ednh (c\u00e1ch ch\u1ecdn nhanh ch\u00f3ng)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu kho\u1ea3ng c\u00e1ch \u2264 150 m \u2192 <a href=\"https:\/\/www.l-p.com\/products\/482750.htm\" target=\"_self\"><strong>SR4<\/strong><\/a><\/p><\/li>\n\n\n\n<li><p>N\u1ebfu kho\u1ea3ng c\u00e1ch \u2264 10 km \u2192 <a href=\"https:\/\/www.l-p.com\/products\/482605.htm\" target=\"_self\"><strong>LR4<\/strong><\/a><\/p><\/li>\n\n\n\n<li><p>N\u1ebfu kho\u1ea3ng c\u00e1ch \u2264 40 km \u2192 <a href=\"https:\/\/www.l-p.com\/products\/473093.htm\" target=\"_self\"><strong>ER4<\/strong><\/a><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c y\u1ebfu t\u1ed1 c\u00e2n nh\u1eafc b\u1ed5 sung:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i c\u00e1p quang (<a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/smf-optical-transceiver-vs-mmf-optical-transceiver-guide\/\" target=\"_blank\" rel=\"\">MMF so v\u1edbi SMF<\/a>)<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p hi\u1ec7n c\u00f3<\/p><\/li>\n\n\n\n<li><p>Y\u00eau c\u1ea7u m\u1edf r\u1ed9ng quy m\u00f4 trong t\u01b0\u01a1ng lai<\/p><\/li>\n\n\n\n<li><p>Ng\u00e2n s\u00e1ch quang h\u1ecdc v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c suy hao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa SR4, LR4 v\u00e0 ER4 kh\u00f4ng ch\u1ec9 li\u00ean quan \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 \u2014 m\u00e0 c\u00f2n li\u00ean quan \u0111\u1ebfn kho\u1ea3ng c\u00e1ch, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang v\u00e0 thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac m\u1ea1ng.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>SR4 = t\u1ea7m ng\u1eafn, d\u00f9ng trong trung t\u00e2m d\u1eef li\u1ec7u, b\u00ean trong t\u1ee7 rack<\/p><\/li>\n\n\n\n<li><p>LR4 = x\u01b0\u01a1ng s\u1ed1ng doanh nghi\u1ec7p v\u00e0 \u0111\u00f4 th\u1ecb ti\u00eau chu\u1ea9n<\/p><\/li>\n\n\n\n<li><p>ER4 = k\u1ebft n\u1ed1i li\u00ean v\u00f9ng kho\u1ea3ng c\u00e1ch xa, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn module ph\u00f9 h\u1ee3p \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh, chi ph\u00ed v\u1eadn h\u00e0nh th\u1ea5p h\u01a1n v\u00e0 \u00edt v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch h\u01a1n trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e1ch ch\u1ecdn module 40GBASE-ER4 ph\u00f9 h\u1ee3p <\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi l\u1ef1a ch\u1ecdn module quang h\u1ecdc 40GBASE-ER4 QSFP+, b\u1ea1n kh\u00f4ng ch\u1ec9 c\u1ea7n t\u00ecm \u201cb\u1ea5t k\u1ef3 b\u1ed9 thu ph\u00e1t 40G n\u00e0o\u201d. V\u00ec c\u00e1c b\u1ed9 quang ER4 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng t\u1ea7m xa, ti\u00eau ch\u00ed mua s\u1eafm ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\">t\u01b0\u01a1ng th\u00edch<\/a>, h\u1ed7 tr\u1ee3 t\u1eeb nh\u00e0 cung c\u1ea5p v\u00e0 tri\u1ec3n khai. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn ng\u1eafn g\u1ecdn, t\u1eadp trung v\u00e0o ra quy\u1ebft \u0111\u1ecbnh \u0111\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn \u0111\u00fang module cho m\u1ea1ng c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496.jpg\" alt=\"How to Choose the Right 40GBASE-ER4 Module\" class=\"wp-image-2761\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/adc105cd8d9c4375a72512c1a18a5496-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 m\u00e3 h\u00f3a nh\u00e0 cung c\u1ea5p<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Ki\u1ec3m tra danh s\u00e1ch h\u1ed7 tr\u1ee3 switch ch\u1ee7\/nh\u00e0 cung c\u1ea5p:<\/strong> M\u1ed9t s\u1ed1 switch ch\u1ec9 ch\u1ea5p nh\u1eadn b\u1ed9 quang \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1edfi nh\u00e0 s\u1ea3n xu\u1ea5t g\u1ed1c (OEM) ho\u1eb7c y\u00eau c\u1ea7u ID nh\u00e0 cung c\u1ea5p c\u1ee5 th\u1ec3 \u0111\u1ec3 k\u00edch ho\u1ea1t c\u1ed5ng.<\/p><\/li>\n\n\n\n<li><p><strong>Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n MSA:<\/strong> \u0110\u1ea3m b\u1ea3o module tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n QSFP+ MSA \u0111\u1ec3 h\u1ed7 tr\u1ee3 \u0111\u00fang ch\u1ee9c n\u0103ng thay th\u1ebf n\u00f3ng (hot-swap) v\u00e0 gi\u00e1m s\u00e1t k\u1ef9 thu\u1eadt s\u1ed1 (DOM).<\/p><\/li>\n\n\n\n<li><p><strong>Kh\u00f3a nh\u00e0 cung c\u1ea5p (vendor lock-in):<\/strong> C\u00e1c b\u1ed9 quang OEM (v\u00ed d\u1ee5: Cisco, Juniper) th\u01b0\u1eddng c\u00f3 h\u1ed7 tr\u1ee3 \u0111\u1ea3m b\u1ea3o, trong khi c\u00e1c module b\u00ean th\u1ee9 ba th\u01b0\u1eddng y\u00eau c\u1ea7u ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch r\u00f5 r\u00e0ng trong t\u00e0i li\u1ec7u ho\u1eb7c giao di\u1ec7n d\u00f2ng l\u1ec7nh (CLI) c\u1ee7a switch.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u1eb9o:<br><\/strong> C\u00e1c module nh\u01b0 QSFPTEK 40GBASE\u2011ER4 QSFP+ v\u00e0 FiberMall 40GBASE\u2011ER4 QSFP+ cung c\u1ea5p kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch r\u1ed9ng r\u00e3i v\u1edbi nhi\u1ec1u c\u1ed5ng QSFP+ t\u01b0\u01a1ng th\u00edch Cisco v\u00e0 c\u1ed5ng QSFP+ chung.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u00f4 h\u00ecnh switch ch\u1ee7 v\u00e0 firmware<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>H\u1ed7 tr\u1ee3 n\u1ec1n t\u1ea3ng:<\/strong> X\u00e1c minh r\u1eb1ng m\u00f4 h\u00ecnh c\u00f4ng t\u1eafc c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3 c\u1ee5 th\u1ec3 c\u00e1c module quang 40GBASE-ER4, ch\u1ee9 kh\u00f4ng ch\u1ec9 c\u00e1c module QSFP+ th\u00f4ng th\u01b0\u1eddng.<\/p><\/li>\n\n\n\n<li><p><strong>Phi\u00ean b\u1ea3n firmware:<\/strong> M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng y\u00eau c\u1ea7u c\u1eadp nh\u1eadt firmware \u0111\u1ec3 k\u00edch ho\u1ea1t c\u00e1c module quang t\u1ea7m xa ho\u1eb7c s\u1eeda l\u1ed7i \u0111\u1ecdc d\u1eef li\u1ec7u DOM.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u1ea9n \u0111o\u00e1n DOM:<\/strong> C\u00e1c module h\u1ed7 tr\u1ee3 DOM cho ph\u00e9p gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c c\u00f4ng su\u1ea5t ph\u00e1t\/nh\u1eadn (Tx\/Rx), nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n \u00e1p \u2014 r\u1ea5t h\u1eefu \u00edch cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module nh\u01b0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472717.htm\"><span style=\"color: rgb(51, 51, 51);\">Cisco QSFP-40G-ER4<\/span><\/a> Module t\u01b0\u01a1ng th\u00edch v\u00e0 Module t\u01b0\u01a1ng th\u00edch QSFPER4 c\u1ee7a Allied Telesis bao g\u1ed3m h\u1ed7 tr\u1ee3 DOM, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c gi\u00e1m s\u00e1t \u0111\u1ecbnh k\u1ef3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Kho\u1ea3ng c\u00e1ch v\u00e0 suy hao:<\/strong> \u0110\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng c\u00e1p quang \u0111\u01a1n mode c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 to\u00e0n b\u1ed9 kho\u1ea3ng c\u00e1ch 40 km v\u1edbi m\u1ee9c suy hao ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c (\u0111\u1ea7u n\u1ed1i, m\u1ed1i n\u1ed1i, u\u1ed1n cong).<\/p><\/li>\n\n\n\n<li><p><strong>Ng\u00e2n s\u00e1ch quang h\u1ecdc:<\/strong> X\u00e1c nh\u1eadn c\u00f4ng su\u1ea5t ph\u00e1t\/nh\u1eadn (Tx\/Rx) v\u00e0 \u0111\u1ed9 nh\u1ea1y \u0111\u1ea7u thu c\u1ee7a module ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c t\u00ednh suy hao c\u1ee7a li\u00ean k\u1ebft.<\/p><\/li>\n\n\n\n<li><p><strong>Suy hao cho li\u00ean k\u1ebft ng\u1eafn:<\/strong> C\u00e1c module quang ER4 c\u00f3 c\u00f4ng su\u1ea5t ph\u00e1t cao v\u00e0 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u b\u1ed9 suy gi\u1ea3m n\u1ed1i ti\u1ebfp tr\u00ean c\u00e1c kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u1eb1m tr\u00e1nh qu\u00e1 t\u1ea3i \u0111\u1ea7u thu.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu li\u00ean k\u1ebft c\u1ee7a b\u1ea1n ng\u1eafn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi 40 km, h\u00e3y x\u00e1c minh xem vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 suy gi\u1ea3m hay m\u1ed9t module quang kh\u00e1c (v\u00ed d\u1ee5: LR4) c\u00f3 ph\u00f9 h\u1ee3p h\u01a1n kh\u00f4ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u00ednh s\u00e1ch h\u1ed7 tr\u1ee3 v\u00e0 b\u1ea3o h\u00e0nh<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Ph\u1ea1m vi b\u1ea3o h\u00e0nh:<\/strong> Ki\u1ec3m tra xem module c\u00f3 \u0111i k\u00e8m b\u1ea3o h\u00e0nh hay kh\u00f4ng v\u00e0 ph\u1ea1m vi b\u1ea3o h\u00e0nh bao g\u1ed3m nh\u1eefng g\u00ec (v\u00ed d\u1ee5: l\u1ed7i ngay khi nh\u1eadn h\u00e0ng \u2013 DOA, tr\u1ecdn \u0111\u1eddi).<\/p><\/li>\n\n\n\n<li><p><strong>H\u1ed7 tr\u1ee3 c\u1ee7a nh\u00e0 cung c\u1ea5p:<\/strong> C\u00e1c module c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t g\u1ed1c (OEM) ho\u1eb7c \u0111\u1ed1i t\u00e1c \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n th\u01b0\u1eddng cung c\u1ea5p k\u00eanh h\u1ed7 tr\u1ee3 t\u1ed1t h\u01a1n n\u1ebfu ph\u00e1t sinh v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch.<\/p><\/li>\n\n\n\n<li><p><strong>Ch\u00ednh s\u00e1ch ho\u00e0n tr\u1ea3:<\/strong> \u0110\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c module b\u00ean th\u1ee9 ba, ch\u00ednh s\u00e1ch ho\u00e0n tr\u1ea3 linh ho\u1ea1t gi\u00fap gi\u1ea3m thi\u1ec3u r\u1ee7i ro v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ea3n ph\u1ea9m nh\u01b0 Fortinet <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/473103.htm\">FG-TRAN-QSFP+ER<\/a> B\u1ed9 chuy\u1ec3n \u0111\u1ed5i quang t\u1eeb c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i uy t\u00edn th\u01b0\u1eddng bao g\u1ed3m c\u00e1c \u0111i\u1ec1u kho\u1ea3n b\u1ea3o h\u00e0nh r\u00f5 r\u00e0ng v\u00e0 k\u00eanh h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng v\u00e0 v\u1eadn h\u00e0nh<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>D\u1ea3i nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng:<\/strong> C\u00e1c module quang th\u01b0\u01a1ng m\u1ea1i ti\u00eau chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho d\u1ea3i nhi\u1ec7t \u0111\u1ed9 0\u201370\u00b0C. N\u1ebfu tri\u1ec3n khai trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, h\u00e3y ch\u1ecdn c\u00e1c module h\u1ed7 tr\u1ee3 d\u1ea3i nhi\u1ec7t \u0111\u1ed9 m\u1edf r\u1ed9ng.<\/p><\/li>\n\n\n\n<li><p><strong>M\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng:<\/strong> C\u00e1c module QSFP+ c\u00f3 m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n kh\u00e1c nhau; \u0111\u1ea3m b\u1ea3o c\u00f4ng t\u1eafc c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 cung c\u1ea5p \u0111\u1ee7 c\u00f4ng su\u1ea5t.<\/p><\/li>\n\n\n\n<li><p><strong>Telemetry DOM:<\/strong> Gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n th\u1eddi gian th\u1ef1c h\u1ed7 tr\u1ee3 b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Danh s\u00e1ch ki\u1ec3m tra nhanh<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 X\u00e1c nh\u1eadn nh\u00e0 s\u1ea3n xu\u1ea5t\/\u0111\u01a1n v\u1ecb cung c\u1ea5p thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 quang h\u1ecdc ER4<br>\u2714 X\u00e1c th\u1ef1c lo\u1ea1i c\u00e1p quang v\u00e0 kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n b\u1eb1ng c\u00e1c ph\u00e9p t\u00ednh suy hao<br>\u2714 Ch\u1ecdn module c\u00f3 h\u1ed7 tr\u1ee3 gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) \u0111\u1ec3 d\u1ec5 d\u00e0ng theo d\u00f5i h\u01a1n<br>\u2714 Ki\u1ec3m tra ch\u00ednh s\u00e1ch b\u1ea3o h\u00e0nh v\u00e0 ho\u00e0n tr\u1ea3<br>\u2714 \u0110\u1ea3m b\u1ea3o th\u00f4ng s\u1ed1 nhi\u1ec7t \u0111\u1ed9 v\u00e0 ho\u1ea1t \u0111\u1ed9ng ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n tri\u1ec3n khai<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 40GBASE-ER4<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a.jpg\" alt=\"FAQ About 40GBASE-ER4\" class=\"wp-image-2762\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ab941d05db0c4345bd91552211310d3a-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 1. Kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a c\u1ee7a 40GBASE-ER4 l\u00e0 bao nhi\u00eau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>40GBASE-ER4 h\u1ed7 tr\u1ee3 l\u00ean \u0111\u1ebfn kho\u1ea3ng 40 km tr\u00ean c\u00e1p quang \u0111\u01a1n mode (SMF).<\/strong><br>Trong tri\u1ec3n khai th\u1ef1c t\u1ebf, kho\u1ea3ng c\u00e1ch \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u1ee5 thu\u1ed9c v\u00e0o suy hao quang, ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p quang v\u00e0 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea7u n\u1ed1i\/n\u1ed1i s\u1ee3i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 2. 40GBASE-ER4 c\u00f3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1p quang \u0111a mode kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Kh\u00f4ng. 40GBASE-ER4 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1p quang \u0111\u01a1n mode (SMF).<\/strong><br>C\u00e1p quang \u0111a mode (OM3\/OM4) kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 do \u0111\u1ed9 t\u00e1n s\u1eafc cao h\u01a1n v\u00e0 suy hao t\u00edn hi\u1ec7u t\u0103ng tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 3. 40GBASE-ER4 s\u1eed d\u1ee5ng lo\u1ea1i \u0111\u1ea7u n\u1ed1i n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3 s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i <strong>LC k\u00e9p<\/strong>, ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t s\u1ee3i d\u00f9ng \u0111\u1ec3 ph\u00e1t (Tx)<\/p><\/li>\n\n\n\n<li><p>M\u1ed9t s\u1ee3i d\u00f9ng \u0111\u1ec3 thu (Rx)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y gi\u00fap n\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1p n\u1ed1i SMF ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 4. 40GBASE-ER4 c\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi m\u1ecdi c\u1ed5ng QSFP+ kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng v\u1eady. <strong>T\u00ednh t\u01b0\u01a1ng th\u00edch ph\u1ee5 thu\u1ed9c v\u00e0o nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch v\u00e0 ph\u1ea7n m\u1ec1m firmware.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t nh\u01b0 Cisco Systems v\u00e0 Arista Networks c\u00f3 th\u1ec3 y\u00eau c\u1ea7u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e3 h\u00f3a transceiver \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t<\/p><\/li>\n\n\n\n<li><p>Thi\u1ebft b\u1ecb quang h\u1ecdc \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn b\u1edfi nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 firmware cho quang h\u1ecdc ER4<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 5. 40GBASE-ER4 c\u00f3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f3, nh\u01b0ng ch\u1ec9 \u1edf m\u1ee9c giao th\u1ee9c \u2014 kh\u00f4ng ph\u1ea3i \u1edf m\u1ee9c lo\u1ea1i giao di\u1ec7n.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u00f3 t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n Ethernet 40G<\/p><\/li>\n\n\n\n<li><p>N\u00f3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c c\u1ed5ng 1G ho\u1eb7c 10G<\/p><\/li>\n\n\n\n<li><p>N\u00f3 y\u00eau c\u1ea7u giao di\u1ec7n QSFP+ 40G<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 6. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng 40GBASE-ER4 cho kho\u1ea3ng c\u00e1ch ng\u1eafn kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt th\u00ec c\u00f3, nh\u01b0ng <strong>kh\u00f4ng khuy\u1ebfn ngh\u1ecb n\u1ebfu kh\u00f4ng s\u1eed d\u1ee5ng b\u1ed9 suy gi\u1ea3m quang<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec ER4 c\u00f3 c\u00f4ng su\u1ea5t ph\u00e1t cao:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n ng\u1eafn c\u00f3 th\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i b\u1ed9 thu<\/p><\/li>\n\n\n\n<li><p>C\u00f3 th\u1ec3 c\u1ea7n b\u1ed9 suy gi\u1ea3m n\u1ed1i ti\u1ebfp \u0111\u1ec3 v\u1eadn h\u00e0nh an to\u00e0n<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 7. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ER4 v\u00e0 LR4 l\u00e0 g\u00ec, n\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>LR4:<\/strong> l\u00ean \u0111\u1ebfn 10 km (c\u00e1c li\u00ean k\u1ebft ti\u00eau chu\u1ea9n trong doanh nghi\u1ec7p\/khu\u00f4n vi\u00ean)<\/p><\/li>\n\n\n\n<li><p><strong>ER4:<\/strong> l\u00ean \u0111\u1ebfn 40 km (c\u00e1c li\u00ean k\u1ebft \u0111\u00f4 th\u1ecb v\u00e0 li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u \u2013 DCI \u1edf kho\u1ea3ng c\u00e1ch xa)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">ER4 v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 phi\u00ean b\u1ea3n ER4 c\u00f3 t\u1ea7m ho\u1ea1t \u0111\u1ed9ng xa h\u01a1n c\u1ee7a LR4 v\u1edbi y\u00eau c\u1ea7u ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n cao h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 8. 40GBASE-ER4 c\u00f3 h\u1ed7 tr\u1ee3 Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f3. H\u1ea7u h\u1ebft c\u00e1c m\u00f4-\u0111un ER4 \u0111\u1ec1u h\u1ed7 tr\u1ee3 DOM.<\/strong><br>\u0110i\u1ec1u n\u00e0y cho ph\u00e9p gi\u00e1m s\u00e1t theo th\u1eddi gian th\u1ef1c c\u00e1c th\u00f4ng s\u1ed1 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang (Tx\/Rx)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p<\/p><\/li>\n\n\n\n<li><p>D\u00f2ng ph\u00e2n c\u1ef1c laser<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">DOM r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh trong c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C9. Khi n\u00e0o t\u00f4i n\u00ean ch\u1ecdn ER4 thay v\u00ec SR4 ho\u1eb7c LR4?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ecdn ER4 khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 10 km<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (single-mode fiber) \u0111\u00e3 s\u1eb5n c\u00f3<\/p><\/li>\n\n\n\n<li><p>C\u1ea7n m\u1ed9t li\u00ean k\u1ebft \u0111i\u1ec3m-\u0111i\u1ec3m tr\u1ef1c ti\u1ebfp v\u1edbi t\u1ea7m xa<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C10. 40GBASE-ER4 c\u00f2n ph\u00f9 h\u1ee3p trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3. M\u1eb7c d\u00f9 t\u1ed1c \u0111\u1ed9 100G v\u00e0 400G \u0111ang gia t\u0103ng, 40GBASE-ER4 v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng c\u0169, c\u00e1c li\u00ean k\u1ebft \u0111\u00f4 th\u1ecb (metro), v\u00e0 c\u00e1c tri\u1ec3n khai x\u01b0\u01a1ng s\u1ed1ng (backbone) nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed\u2014n\u01a1i c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng 40G hi\u1ec7n h\u1eefu v\u1eabn \u0111\u01b0\u1ee3c duy tr\u00ec.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 K\u1ebft lu\u1eadn: Li\u1ec7u 40GBASE-ER4 c\u00f3 ph\u1ea3i l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-ER4 v\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady nh\u1ea5t d\u00e0nh cho k\u1ebft n\u1ed1i Ethernet 40G t\u1ea7m xa tr\u00ean c\u00e1p s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng y\u00eau c\u1ea7u hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh tr\u00ean kho\u1ea3ng c\u00e1ch m\u1edf r\u1ed9ng. V\u1edbi kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eabn l\u00ean \u0111\u1ebfn 40 km, gi\u1ea3i ph\u00e1p n\u00e0y l\u1ea5p \u0111\u1ea7y kho\u1ea3ng tr\u1ed1ng quan tr\u1ecdng gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb quang ti\u00eau chu\u1ea9n d\u00e0nh cho doanh nghi\u1ec7p v\u00e0 c\u00e1c y\u00eau c\u1ea7u th\u1ef1c s\u1ef1 v\u1ec1 m\u1ea1ng \u0111\u00f4 th\u1ecb (metro) ho\u1eb7c li\u00ean k\u1ebft gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u (DCI).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a.jpg\" alt=\"40GBASE-ER4 Is the Right Choice\" class=\"wp-image-2763\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0e51c767a87c4d42ba102e3ac4ec321a-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 g\u00f3c \u0111\u1ed9 thi\u1ebft k\u1ebf m\u1ea1ng, ER4 l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn khi tri\u1ec3n khai c\u1ee7a b\u1ea1n \u0111\u00e1p \u1ee9ng ba \u0111i\u1ec1u ki\u1ec7n then ch\u1ed1t sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a LR4 ti\u00eau chu\u1ea9n (tr\u00ean ~10 km)<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF) duplex \u0111\u00e3 s\u1eb5n c\u00f3<\/p><\/li>\n\n\n\n<li><p>C\u1ea7n m\u1ed9t k\u1ebft n\u1ed1i \u0111i\u1ec3m-\u0111i\u1ec3m \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa m\u00e0 kh\u00f4ng c\u1ea7n t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u trung gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, vi\u1ec7c tri\u1ec3n khai th\u00e0nh c\u00f4ng ph\u1ee5 thu\u1ed9c r\u1ea5t l\u1edbn v\u00e0o vi\u1ec7c x\u00e1c th\u1ef1c t\u00ednh t\u01b0\u01a1ng th\u00edch \u0111\u00fang c\u00e1ch v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch ng\u00e2n s\u00e1ch quang h\u1ecdc. Vi\u1ec7c h\u1ed7 tr\u1ee3 t\u1eeb switch, c\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 y\u00eau c\u1ea7u suy hao (attenuation) \u0111\u1ec1u ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t nh\u1eb1m \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 tr\u00e1nh t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i b\u1ed9 thu ho\u1eb7c m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, 40GBASE-ER4 kh\u00f4ng ph\u1ea3i l\u00e0 thi\u1ebft b\u1ecb quang \u0111a n\u0103ng\u2014m\u00e0 l\u00e0 gi\u1ea3i ph\u00e1p chuy\u00ean bi\u1ec7t cho k\u1ebft n\u1ed1i t\u1ea7m xa, ph\u00f9 h\u1ee3p cho c\u00e1c li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng (backbone-grade), do \u0111\u00f3 l\u00fd t\u01b0\u1edfng cho c\u00e1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u, m\u1ea1ng \u0111\u00f4 th\u1ecb (metro) v\u00e0 c\u00e1c li\u00ean k\u1ebft v\u1eadn chuy\u1ec3n quy m\u00f4 doanh nghi\u1ec7p\u2014n\u01a1i \u0111\u1ed9 tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang l\u00ean k\u1ebf ho\u1ea1ch tri\u1ec3n khai h\u1ec7 th\u1ed1ng 40G v\u00e0 c\u1ea7n c\u00e1c t\u00f9y ch\u1ecdn t\u01b0\u01a1ng th\u00edch \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng, hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh c\u0169ng nh\u01b0 chi ph\u00ed hi\u1ec7u qu\u1ea3, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c b\u1ed9 thu ph\u00e1t t\u01b0\u01a1ng th\u00edch ch\u1ea5t l\u01b0\u1ee3ng cao t\u1ea1i <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a>, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 h\u1ed7 tr\u1ee3 nhi\u1ec1u n\u1ec1n t\u1ea3ng m\u1ea1ng doanh nghi\u1ec7p v\u1edbi hi\u1ec7u n\u0103ng quang h\u1ecdc nh\u1ea5t qu\u00e1n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c t\u1ed1t.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u 40GBASE-ER4 l\u00e0 g\u00ec, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn t\u1ed1i \u0111a tr\u00ean s\u1ee3i quang \u0111\u01a1n mode duplex, c\u00e1c thi\u1ebft b\u1ecb m\u00e0 n\u00f3 h\u1ed7 tr\u1ee3 v\u00e0 c\u00e1ch ch\u1ecdn module quang QSFP+ ph\u00f9 h\u1ee3p.<\/p>","protected":false},"author":1,"featured_media":2764,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[18],"class_list":["post-2766","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products","tag-40g-qsfp-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2766","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=2766"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2766\/revisions"}],"predecessor-version":[{"id":10719,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2766\/revisions\/10719"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2764"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}