{"id":3760,"date":"2025-11-19T00:00:00","date_gmt":"2025-11-19T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/troubleshooting-optical-link-performance-issues-guide\/"},"modified":"2026-06-22T04:54:04","modified_gmt":"2026-06-22T04:54:04","slug":"troubleshooting-optical-link-performance-issues-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/troubleshooting-optical-link-performance-issues-guide","title":{"rendered":"H\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 hi\u1ec7u su\u1ea5t li\u00ean k\u1ebft quang ph\u1ed5 bi\u1ebfn"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1408\" height=\"768\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657.jpg\" alt=\"Troubleshooting Optical Link Performance Issues\" class=\"wp-image-3757\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657.jpg 1408w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657-300x164.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657-1024x559.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657-768x419.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8d1cefdcce45cdb166674fff535657-18x10.jpg 18w\" sizes=\"(max-width: 1408px) 100vw, 1408px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t k\u1ebft n\u1ed1i m\u1ea1ng ch\u1edbp t\u1eaft. Vi\u1ec7c m\u1ea5t g\u00f3i d\u1eef li\u1ec7u kh\u00f4ng r\u00f5 nguy\u00ean nh\u00e2n. T\u00ecnh tr\u1ea1ng ch\u1eadm tr\u1ec5 ng\u1eaft qu\u00e3ng v\u00e0o gi\u1edd cao \u0111i\u1ec3m. N\u1ebfu b\u1ea1n qu\u1ea3n l\u00fd m\u1ed9t m\u1ea1ng c\u00e1p quang, nh\u1eefng s\u1ef1 c\u1ed1 n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n c\u1ea3m gi\u00e1c nh\u01b0 \u0111ang truy t\u00ecm nh\u1eefng b\u00f3ng ma. Kh\u00f4ng gi\u1ed1ng nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-twisted-pair-copper-cable-and-how-does-it-work\/\"><strong>c\u00e1p \u0111\u1ed3ng<\/strong><\/a>, c\u00e1c v\u1ea5n \u0111\u1ec1 trong m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n quang kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c b\u1eb1ng m\u1eaft th\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eebng lo! H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd trang b\u1ecb cho b\u1ea1n m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn h\u1ec7 th\u1ed1ng nh\u1eb1m ch\u1ea9n \u0111o\u00e1n v\u00e0 gi\u1ea3i quy\u1ebft <strong>c\u00e1c s\u1ef1 c\u1ed1 suy gi\u1ea3m hi\u1ec7u su\u1ea5t \u0111\u01b0\u1eddng truy\u1ec1n quang ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/strong>. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ea3m b\u1ea3o m\u1ea1ng c\u1ee7a m\u00ecnh v\u1eadn h\u00e0nh \u1edf hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 Hi\u1ec3u c\u00e1c ch\u1ec9 s\u1ed1 then ch\u1ed1t: C\u00e1c \u201cd\u1ea5u hi\u1ec7u sinh t\u1ed3n\u201d c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, b\u1ea1n c\u1ea7n bi\u1ebft \u0111i\u1ec1u g\u00ec c\u1ea7n \u0111o l\u01b0\u1eddng. M\u1ed7i \u0111\u01b0\u1eddng truy\u1ec1n quang \u0111\u1ec1u c\u00f3 c\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t then ch\u1ed1t (KPI) \u0111\u00f3ng vai tr\u00f2 nh\u01b0 c\u00e1c d\u1ea5u hi\u1ec7u sinh t\u1ed3n c\u1ee7a n\u00f3. Hai ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u1ea5t l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px 0px 8px;\"><strong>M\u1ee9c c\u00f4ng su\u1ea5t quang:<\/strong> \u0110\u01b0\u1ee3c \u0111o b\u1eb1ng decibel (dBm), th\u00f4ng s\u1ed1 n\u00e0y cho bi\u1ebft \u0111\u1ed9 m\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng.<\/p><ul><li><p style=\"margin: 0px;\"><strong>C\u00f4ng su\u1ea5t nh\u1eadn (Rx):<\/strong> Qu\u00e1 cao (b\u00e3o h\u00f2a) ho\u1eb7c qu\u00e1 th\u1ea5p (t\u00edn hi\u1ec7u y\u1ebfu) \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i.<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px;\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\"><strong>T\u1ef7 l\u1ec7 L\u1ed7i Bit (BER)<\/strong><\/a><strong>:<\/strong> \u0110\u00e2y l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa s\u1ed1 bit l\u1ed7i tr\u00ean t\u1ed5ng s\u1ed1 bit \u0111\u01b0\u1ee3c truy\u1ec1n. T\u1ef7 l\u1ec7 BER cao tr\u1ef1c ti\u1ebfp d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t k\u00e9m v\u00e0 m\u1ea5t g\u00f3i d\u1eef li\u1ec7u.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n kh\u1ecfe m\u1ea1nh ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t kho\u1ea3ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/power-budget-importance-calculation-management-for-devices\/\"><strong>ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang<\/strong><\/a>, t\u1ee9c l\u00e0 ch\u00eanh l\u1ec7ch gi\u1eefa c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 ph\u00e1t v\u00e0 \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 C\u00e1c tri\u1ec7u ch\u1ee9ng ph\u1ed5 bi\u1ebfn &amp; nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a ch\u00fang<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 c\u00e1c s\u1ef1 c\u1ed1 th\u01b0\u1eddng g\u1eb7p nh\u1ea5t, c\u00e1c tri\u1ec7u ch\u1ee9ng t\u01b0\u01a1ng \u1ee9ng v\u00e0 c\u00e1c nguy\u00ean nh\u00e2n kh\u1ea3 d\u0129.<\/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>Tri\u1ec7u ch\u1ee9ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 x\u1ea3y ra<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ki\u1ec3m tra nhanh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u1ea5t k\u1ebft n\u1ed1i ng\u1eaft qu\u00e3ng \/ Nh\u1ea3y li\u00ean k\u1ebft (Link Flaps)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n ho\u1eb7c h\u01b0 h\u1ecfng, k\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo, b\u1ed9 thu ph\u00e1t l\u1ed7i.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i. C\u1eafm l\u1ea1i b\u1ed9 thu ph\u00e1t.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u1ef7 l\u1ec7 l\u1ed7i bit cao (BER)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t quang nh\u1eadn th\u1ea5p, t\u1ed5n hao \u0111\u01b0\u1eddng truy\u1ec1n cao, hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc ho\u1eb7c b\u1ed9 thu ph\u00e1t \u0111ang h\u1ecfng.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ki\u1ec3m tra m\u1ee9c c\u00f4ng su\u1ea5t Rx so v\u1edbi b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ed9 thu ph\u00e1t.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u1ea5t ho\u00e0n to\u00e0n li\u00ean k\u1ebft<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ee9t s\u1ee3i quang, t\u1ed5n hao do u\u1ed1n cong nghi\u00eam tr\u1ecdng, kh\u00f4ng t\u01b0\u01a1ng th\u00edch b\u1ed9 thu ph\u00e1t ho\u1eb7c b\u1ed9 thu ph\u00e1t ho\u00e0n to\u00e0n h\u1ecfng.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c minh c\u00f4ng su\u1ea5t Rx. N\u1ebfu gi\u00e1 tr\u1ecb b\u1eb1ng 0 ho\u1eb7c c\u1ef1c k\u1ef3 th\u1ea5p, h\u00e3y nghi ng\u1edd c\u00f3 \u0111\u1ee9t g\u00e3y v\u1eadt l\u00fd.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Xu\u1ea5t hi\u1ec7n l\u1ed7i ch\u1ec9 \u1edf t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>V\u01b0\u1ee3t gi\u1edbi h\u1ea1n t\u00e1n s\u1eafc s\u1eafc \u0111\u1ed9 ho\u1eb7c t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9, b\u1ed9 thu ph\u00e1t ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea3m b\u1ea3o b\u1ed9 thu ph\u00e1t v\u00e0 lo\u1ea1i s\u1ee3i quang c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn ph\u00f9 h\u1ee3p v\u1edbi kho\u1ea3ng c\u00e1ch v\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u y\u00eau c\u1ea7u.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 Quy tr\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1eebng b\u01b0\u1edbc<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n theo tr\u00ecnh t\u1ef1 logic n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 s\u1eeda ch\u1eefa s\u1ef1 c\u1ed1 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 1: Nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n \u2013 Ki\u1ec3m tra v\u1eadt l\u00fd<\/strong><br\/>\u0110\u1eebng \u0111\u00e1nh gi\u00e1 th\u1ea5p b\u01b0\u1edbc n\u00e0y! H\u01a1n 70% c\u00e1c s\u1ef1 c\u1ed1 \u0111\u01b0\u1eddng truy\u1ec1n quang b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c v\u1ea5n \u0111\u1ec1 \u1edf t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i:<\/strong> S\u1eed d\u1ee5ng k\u00ednh hi\u1ec3n vi ki\u1ec3m tra s\u1ee3i quang chuy\u00ean d\u1ee5ng v\u00e0 d\u1ee5ng c\u1ee5 l\u00e0m s\u1ea1ch. C\u00e1c h\u1ea1t b\u1ee5i c\u00f3 th\u1ec3 l\u00e0m t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng v\u00e0 g\u00e2y t\u1ed5n hao \u0111\u00e1ng k\u1ec3.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m tra c\u00e1c ch\u1ed7 u\u1ed1n cong:<\/strong> \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 d\u00e2y n\u1ed1i s\u1ee3i quang kh\u00f4ng b\u1ecb u\u1ed1n cong qu\u00e1 ch\u1eb7t, xo\u1eafn ho\u1eb7c k\u1eb9p. <strong>b\u00e1n k\u00ednh u\u1ed1n t\u1ed1i thi\u1ec3u<\/strong> l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m tra k\u1ebft n\u1ed1i:<\/strong> \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1p \u0111\u01b0\u1ee3c c\u1eafm ch\u1eafc ch\u1eafn v\u00e0o c\u00e1c b\u1ed9 thu ph\u00e1t v\u00e0 b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panels).<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 2: Khai th\u00e1c ph\u1ea7n c\u1ee9ng \u2013 \u0110\u1ecdc d\u1eef li\u1ec7u ch\u1ea9n \u0111o\u00e1n<\/strong><br\/>H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 thu ph\u00e1t SFP, SFP+ v\u00e0 QSFP hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\"><strong>Gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 (DDM)<\/strong><\/a>, c\u00f2n g\u1ecdi l\u00e0 DOM (Digital Optical Monitoring). Truy c\u1eadp d\u1eef li\u1ec7u n\u00e0y qua CLI ho\u1eb7c GUI c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng. C\u00e1c tham s\u1ed1 then ch\u1ed1t c\u1ea7n ki\u1ec3m tra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>C\u00f4ng su\u1ea5t ph\u00e1t (Tx Power):<\/strong> C\u00f3 n\u1eb1m trong ph\u1ea1m vi d\u1ef1 ki\u1ebfn hay kh\u00f4ng?<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u00f4ng su\u1ea5t nh\u1eadn (Rx Power):<\/strong> C\u00f3 n\u1eb1m trong ph\u1ea1m vi \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu hay kh\u00f4ng? \u0110\u00e2y l\u00e0 ch\u1ec9 s\u1ed1 mang t\u00ednh ch\u1ec9 b\u00e1o m\u1ea1nh nh\u1ea5t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nhi\u1ec7t \u0111\u1ed9 &amp; \u0110i\u1ec7n \u00e1p c\u1ea5p:<\/strong> C\u00e1c gi\u00e1 tr\u1ecb b\u1ea5t th\u01b0\u1eddng c\u00f3 th\u1ec3 cho th\u1ea5y module \u0111ang h\u1ecfng.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 3: \u0110o l\u01b0\u1eddng ch\u00ednh x\u00e1c \u2013 S\u1eed d\u1ee5ng m\u00e1y \u0111o c\u00f4ng su\u1ea5t quang &amp; ngu\u1ed3n s\u00e1ng<\/strong><br\/>N\u1ebfu d\u1eef li\u1ec7u DDM cho th\u1ea5y c\u00f3 v\u1ea5n \u0111\u1ec1, h\u00e3y x\u00e1c nh\u1eadn b\u1eb1ng thi\u1ebft b\u1ecb ki\u1ec3m tra chuy\u00ean d\u1ee5ng.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\">S\u1eed d\u1ee5ng m\u1ed9t <strong>B\u1ed9 ki\u1ec3m tra t\u1ed5n hao quang (OLTS)<\/strong> ho\u1eb7c b\u1ed9 k\u1ebft h\u1ee3p m\u00e1y \u0111o c\u00f4ng su\u1ea5t\/nh\u00f3m laser \u0111\u1ec3 \u0111o t\u1ed5n hao <strong>t\u1ed5n hao \u0111\u01b0\u1eddng truy\u1ec1n<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\">So s\u00e1nh t\u1ed5n hao \u0111o \u0111\u01b0\u1ee3c v\u1edbi t\u1ed5n hao <strong>t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/strong>. \u0111\u00e3 t\u00ednh to\u00e1n tr\u01b0\u1edbc \u0111\u00f3. N\u1ebfu t\u1ed5n hao \u0111o \u0111\u01b0\u1ee3c cao h\u01a1n, ngh\u0129a l\u00e0 c\u00f3 v\u1ea5n \u0111\u1ec1 \u1edf \u0111\u01b0\u1eddng d\u1eabn v\u1eadt l\u00fd.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 4: C\u00f4 l\u1eadp \u0111o\u1ea1n m\u1ea1ch \u2013 Ki\u1ec3m tra b\u1eb1ng OTDR<\/strong><br\/>\u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n d\u00e0i ho\u1eb7c khi nghi ng\u1edd \u0111\u1ee9t s\u1ee3i quang ho\u1eb7c m\u1ed1i n\u1ed1i k\u00e9m, m\u1ed9t thi\u1ebft b\u1ecb <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-time-domain-reflectometer-fiber-fault-detection-guide\/\"><strong>M\u00e1y \u0111o ph\u1ea3n x\u1ea1 th\u1eddi gian quang (OTDR)<\/strong><\/a> l\u00e0 tr\u1ee3 th\u1ee7 \u0111\u1eafc l\u1ef1c nh\u1ea5t. Thi\u1ebft b\u1ecb n\u00e0y cung c\u1ea5p m\u1ed9t \u201cb\u1ea3n \u0111\u1ed3\u201d d\u1ea1ng \u0111\u1ed3 h\u1ecda c\u1ee7a s\u1ee3i quang, cho th\u1ea5y v\u1ecb tr\u00ed v\u00e0 m\u1ee9c \u0111\u1ed9 c\u1ee7a c\u00e1c s\u1ef1 ki\u1ec7n nh\u01b0 m\u1ed1i n\u1ed1i, \u0111\u1ea7u n\u1ed1i v\u00e0 \u0111\u1ee9t g\u00e3y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 L\u00f5i c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n: \u0110\u1eebng b\u1ecf qua b\u1ed9 thu ph\u00e1t quang c\u1ee7a b\u1ea1n<\/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\/5469abfde65b4d248f2de8e37d28da56.webp\" alt=\"optical transceiver\" class=\"wp-image-3758\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5469abfde65b4d248f2de8e37d28da56.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5469abfde65b4d248f2de8e37d28da56-300x169.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5469abfde65b4d248f2de8e37d28da56-1024x576.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5469abfde65b4d248f2de8e37d28da56-768x432.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5469abfde65b4d248f2de8e37d28da56-18x10.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>b\u1ed9 thu ph\u00e1t quang<\/strong><\/a> l\u00e0 th\u00e0nh ph\u1ea7n then ch\u1ed1t th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n sang \u00e1nh s\u00e1ng v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Th\u00e0nh ph\u1ea7n n\u00e0y th\u01b0\u1eddng l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra \u2014 ho\u1eb7c gi\u1ea3i ph\u00e1p cho \u2014 c\u00e1c v\u1ea5n \u0111\u1ec1 hi\u1ec7u su\u1ea5t. Khi l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t, t\u00ednh t\u01b0\u01a1ng th\u00edch, ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1eb7c t\u00ednh k\u1ef9 thu\u1eadt l\u00e0 y\u1ebfu t\u1ed1 h\u00e0ng \u0111\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac vi\u1ec7c ch\u1ecdn nh\u00e0 cung c\u1ea5p \u0111\u00e1ng tin c\u1eady t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn. Ch\u1eb3ng h\u1ea1n, s\u1eed d\u1ee5ng c\u00e1c module hi\u1ec7u su\u1ea5t cao v\u00e0 t\u01b0\u01a1ng th\u00edch nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>LINK-PP SFP28-25G-LR<\/strong><\/a> cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7m xa 25G gi\u00fap \u0111\u1ea3m b\u1ea3o c\u00f4ng su\u1ea5t \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 nh\u1ea1y \u0111\u1ea7u v\u00e0o v\u01b0\u1ee3t tr\u1ed9i. \u0110i\u1ec1u n\u00e0y tr\u1ef1c ti\u1ebfp g\u00f3p ph\u1ea7n t\u1ea1o n\u00ean m\u1ed9t <strong>ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang<\/strong> kh\u1ecfe m\u1ea1nh h\u01a1n v\u00e0 m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n b\u1ec1n b\u1ec9 h\u01a1n, gi\u1ea3m thi\u1ec3u nguy c\u01a1 ph\u00e1t sinh s\u1ef1 c\u1ed1 do hi\u1ec7u su\u1ea5t \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n. M\u1ed9t b\u1ed9 thu ph\u00e1t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a> ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nghi\u00eam ng\u1eb7t c\u00e1c <strong>gi\u1edbi h\u1ea1n t\u00e1n s\u1eafc<\/strong>, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng nh\u1eb1m duy tr\u00ec t\u1ef7 l\u1ec7 l\u1ed7i th\u1ea5p tr\u00ean c\u00e1c kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Khi n\u00e0o n\u00ean nghi ng\u1edd b\u1ed9 thu ph\u00e1t b\u1ecb l\u1ed7i:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\">C\u00e1c gi\u00e1 tr\u1ecb DDM li\u00ean t\u1ee5c n\u1eb1m ngo\u00e0i ph\u1ea1m vi cho ph\u00e9p.<\/p><\/li><li><p style=\"margin: 0px;\">\u0110\u01b0\u1eddng truy\u1ec1n ho\u1ea1t \u0111\u1ed9ng v\u1edbi m\u1ed9t b\u1ed9 thu ph\u00e1t nh\u01b0ng kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng v\u1edbi b\u1ed9 thu ph\u00e1t kh\u00e1c (sau khi lo\u1ea1i tr\u1eeb c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 c\u1ef1c t\u00ednh v\u00e0 b\u01b0\u1edbc s\u00f3ng).<\/p><\/li><li><p style=\"margin: 0px;\">B\u1ea1n th\u1ea5y s\u1ed1 l\u01b0\u1ee3ng l\u1ed7i CRC cao tr\u00ean c\u1ed5ng chuy\u1ec3n m\u1ea1ch.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 B\u1ea3o tr\u00ec ch\u1ee7 \u0111\u1ed9ng: Ng\u0103n ng\u1eeba s\u1ef1 c\u1ed1 tr\u01b0\u1edbc khi ch\u00fang x\u1ea3y ra<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ed1t nh\u1ea5t l\u00e0 lo\u1ea1i m\u00e0 b\u1ea1n ch\u01b0a bao gi\u1edd ph\u1ea3i th\u1ef1c hi\u1ec7n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>L\u01b0u tr\u1eef h\u1ed3 s\u01a1 c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n:<\/strong> Ghi ch\u00e9p l\u1ea1i t\u1ed5n hao \u0111\u00e3 t\u00ednh to\u00e1n v\u00e0 t\u1ed5n hao \u0111o \u0111\u01b0\u1ee3c cho t\u1eebng \u0111\u01b0\u1eddng truy\u1ec1n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Thi\u1ebft l\u1eadp quy tr\u00ecnh l\u00e0m s\u1ea1ch:<\/strong> Y\u00eau c\u1ea7u \u201cki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch\u201d tr\u01b0\u1edbc m\u1ed7i l\u1ea7n k\u1ebft n\u1ed1i.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Gi\u00e1m s\u00e1t c\u00e1c xu h\u01b0\u1edbng DDM:<\/strong> S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd m\u1ea1ng \u0111\u1ec3 gi\u00e1m s\u00e1t t\u00ecnh tr\u1ea1ng s\u1ee9c kh\u1ecfe c\u1ee7a b\u1ed9 thu ph\u00e1t theo th\u1eddi gian v\u00e0 nh\u1eadn c\u1ea3nh b\u00e1o tr\u01b0\u1edbc khi m\u1ed9t sai l\u1ec7ch nh\u1ecf tr\u1edf th\u00e0nh s\u1ef1 c\u1ed1 l\u1edbn.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Mua t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p uy t\u00edn:<\/strong> \u0110\u1ea3m b\u1ea3o r\u1eb1ng <strong>B\u1ed9 thu ph\u00e1t quang t\u01b0\u01a1ng th\u00edch<\/strong> b\u1ea1n mua t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p cam k\u1ebft tu\u00e2n th\u1ee7 \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n MSA v\u00e0 cung c\u1ea5p h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u1eefng ch\u1eafc. Vi\u1ec7c \u0111\u1ea7u t\u01b0 v\u00e0o c\u00e1c linh ki\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng ngay t\u1eeb \u0111\u1ea7u, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1eefng s\u1ea3n ph\u1ea9m t\u1eeb <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\"><strong>LINK-PP<\/strong><\/a>, l\u00e0 n\u1ec1n t\u1ea3ng then ch\u1ed1t c\u1ee7a <strong>t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng c\u00e1p quang<\/strong> v\u00e0 tr\u00e1nh th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng t\u1ed1n k\u00e9m.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n t\u1eeb vi\u1ec7c x\u1eed l\u00fd s\u1ef1 c\u1ed1 mang t\u00ednh ph\u1ea3n \u1ee9ng sang qu\u1ea3n l\u00fd m\u1ea1ng mang t\u00ednh ch\u1ee7 \u0111\u1ed9ng, \u0111\u1ea3m b\u1ea3o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quang h\u1ecdc c\u1ee7a b\u1ea1n kh\u00f4ng ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c m\u00e0 c\u00f2n th\u1ef1c s\u1ef1 b\u1ec1n b\u1ec9 v\u00e0 hi\u1ec7u n\u0103ng cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ea1n n\u00ean l\u00e0m g\u00ec \u0111\u1ea7u ti\u00ean khi li\u00ean k\u1ebft quang c\u1ee7a b\u1ea1n ng\u1eebng ho\u1ea1t \u0111\u1ed9ng?<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra c\u00e1c k\u1ebft n\u1ed1i v\u1eadt l\u00fd. \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1p v\u00e0 \u0111\u1ea7u n\u1ed1i \u0111\u1ec1u \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t. Ki\u1ec3m tra xem c\u00f3 b\u1ee5i b\u1ea9n hay h\u01b0 h\u1ecfng tr\u00ean ch\u00fang hay kh\u00f4ng. Vi\u1ec7c l\u00e0m s\u1ea1ch v\u00e0 l\u1eafp l\u1ea1i c\u00e1c \u0111\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ed9t c\u00e1ch nhanh ch\u00f3ng.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ea1n n\u00ean l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i c\u00e1p quang bao l\u00e2u m\u1ed9t l\u1ea7n?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i m\u1ed7i l\u1ea7n b\u1ea1n r\u00fat ho\u1eb7c c\u1eafm ch\u00fang v\u00e0o. \u0110\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 t\u1ed1t nh\u1ea5t, h\u00e3y ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ea7u n\u1ed1i m\u1ed9t l\u1ea7n m\u1ed7i th\u00e1ng. Vi\u1ec7c l\u00e0m s\u1ea1ch th\u01b0\u1eddng xuy\u00ean gi\u00fap ng\u0103n ng\u1eeba t\u1ed5n hao t\u00edn hi\u1ec7u v\u00e0 duy tr\u00ec \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cho m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 c\u00e1p quang n\u00e0o v\u1edbi b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb n\u00e0o kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng, b\u1ea1n kh\u00f4ng th\u1ec3 l\u00e0m nh\u01b0 v\u1eady. Lo\u1ea1i c\u00e1p v\u00e0 \u0111\u1ea7u n\u1ed1i ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb v\u00e0 b\u1ed9 thu ph\u00e1t c\u1ee7a b\u1ea1n. Lu\u00f4n ki\u1ec3m tra xem ch\u00fang c\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi nhau tr\u01b0\u1edbc khi k\u1ebft n\u1ed1i. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 g\u00e2y ra l\u1ed7i ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y h\u01b0 h\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0o gi\u00fap b\u1ea1n ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1 tr\u00ean c\u00e1p quang?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e1y ph\u1ea3n x\u1ea1 quang th\u1eddi gian (OTDR)<\/p><\/li><li><p>Thi\u1ebft b\u1ecb x\u00e1c \u0111\u1ecbnh l\u1ed7i b\u1eb1ng \u00e1nh s\u00e1ng nh\u00ecn th\u1ea5y (VFL)<\/p><\/li><li><p>K\u00ednh soi s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y gi\u00fap b\u1ea1n ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m \u0111\u1ee9t, u\u1ed1n cong ho\u1eb7c b\u1ee5i b\u1ea9n tr\u00ean c\u00e1p. Ch\u00fang gi\u00fap vi\u1ec7c t\u00ecm ki\u1ebfm v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 tr\u1edf n\u00ean d\u1ec5 d\u00e0ng v\u00e0 nhanh ch\u00f3ng h\u01a1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110ang kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 li\u00ean k\u1ebft quang? X\u00e1c \u0111\u1ecbnh v\u00e0 s\u1eeda ch\u1eefa nhanh ch\u00f3ng c\u00e1c v\u1ea5n \u0111\u1ec1 s\u1ee3i quang ph\u1ed5 bi\u1ebfn b\u1eb1ng c\u00e1c gi\u1ea3i ph\u00e1p t\u1eebng b\u01b0\u1edbc nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t m\u1ea1ng \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":1,"featured_media":3759,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[13,14,15,18,24,26],"class_list":["post-3760","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-100g-modules","tag-10g-sfp-transceivers","tag-link-pp-1g-sfp-modules","tag-40g-qsfp-transceivers","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3760","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=3760"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3760\/revisions"}],"predecessor-version":[{"id":10861,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3760\/revisions\/10861"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3759"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}