{"id":2640,"date":"2026-03-28T00:00:00","date_gmt":"2026-03-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp-distance-real-world-range-optics-explained\/"},"modified":"2026-06-22T03:43:40","modified_gmt":"2026-06-22T03:43:40","slug":"sfp-distance-real-world-range-optics-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-distance-real-world-range-optics-explained","title":{"rendered":"SFP kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: R\u1ed9ng th\u1ef1c t\u1ebf, gi\u1edbi h\u1ea1n v\u00e0 quang h\u1ecdc"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao ng\u00e0y nay, kho\u1ea3ng c\u00e1ch SFP \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t nh\u01b0ng c\u0169ng th\u01b0\u1eddng b\u1ecb hi\u1ec3u sai nh\u1ea5t khi thi\u1ebft k\u1ebf c\u00e1c k\u1ebft n\u1ed1i quang h\u1ecdc. D\u00f9 tri\u1ec3n khai b\u1ed9 chuy\u1ec3n m\u1ea1ch doanh nghi\u1ec7p, x\u01b0\u01a1ng s\u1ed1ng vi\u1ec5n th\u00f4ng hay li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u, k\u1ef9 s\u01b0 th\u01b0\u1eddng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng t\u1ed1c \u0111\u1ed9 (<br>) x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a m\u00e0 m\u1ed9t k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c.<a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">1G<\/a>, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27040-2-5g-sfp.htm\">2,5G<\/a>, or <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">Kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/a>Tr\u00ean th\u1ef1c t\u1ebf, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn SFP \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi thi\u1ebft k\u1ebf quang h\u1ecdc\u2014ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t b\u1ed9 thu ph\u00e1t SFP (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/huong-dan-ve-bo-thu-phat-sfp-small-form-factor-pluggable\/\">Typical Medium<\/a>) m\u00f4-\u0111un truy\u1ec1n d\u1eef li\u1ec7u qua s\u1ee3i quang b\u1eb1ng c\u00e1c b\u01b0\u1edbc s\u00f3ng v\u00e0 m\u1ee9c c\u00f4ng su\u1ea5t c\u1ee5 th\u1ec3, v\u1ed1n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn kho\u1ea3ng c\u00e1ch t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 truy\u1ec1n \u0111i tr\u01b0\u1edbc khi b\u1ecb suy hao. \u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao hai m\u00f4-\u0111un c\u00f3 c\u00f9ng d\u1ea1ng h\u00ecnh h\u1ecdc l\u1ea1i c\u00f3 th\u1ec3 c\u00f3 ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t\u2014m\u1ed9t s\u1ed1 ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf v\u00e0i tr\u0103m m\u00e9t, trong khi nh\u1eefng m\u00f4-\u0111un kh\u00e1c c\u00f3 th\u1ec3 \u1ed5n \u0111\u1ecbnh \u0111\u1ea1t t\u1edbi h\u00e0ng ch\u1ee5c kil\u00f4m\u00e9t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ngu\u1ed3n g\u00e2y nh\u1ea7m l\u1eabn ph\u1ed5 bi\u1ebfn b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c kinh nghi\u1ec7m tri\u1ec3n khai th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c chia s\u1ebb r\u1ed9ng r\u00e3i trong c\u1ed9ng \u0111\u1ed3ng k\u1ef9 s\u01b0. Nhi\u1ec1u s\u1ef1 c\u1ed1 m\u1ea1ng kh\u00f4ng xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch hay gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng, m\u00e0 do nh\u1eefng gi\u1ea3 \u0111\u1ecbnh sai l\u1ea7m v\u1ec1 ph\u1ea1m vi SFP, l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng ho\u1eb7c kh\u00f4ng kh\u1edbp lo\u1ea1i s\u1ee3i quang (<br>).<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/smf-optical-transceiver-vs-mmf-optical-transceiver-guide\/\">\u0111\u01a1n mode so v\u1edbi \u0111a mode<\/a>V\u00ed d\u1ee5, s\u1eed d\u1ee5ng quang h\u1ecdc t\u1ea7m ng\u1eafn (<br>)<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\">SR 850 nm<\/a>) tr\u00ean c\u00e1c \u0111o\u1ea1n c\u00e1p quang d\u00e0i ho\u1eb7c l\u1eafp \u0111\u1eb7t sai m\u00f4-\u0111un t\u1ea7m xa tr\u00ean c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i ng\u1eafn c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh, qu\u00e1 t\u1ea3i t\u00edn hi\u1ec7u ho\u1eb7c th\u1eadm ch\u00ed m\u1ea5t ho\u00e0n to\u00e0n li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c hi\u1ec3u r\u00f5 kho\u1ea3ng c\u00e1ch SFP tr\u1edf n\u00ean thi\u1ebft y\u1ebfu kh\u00f4ng ch\u1ec9 \u0111\u1ed1i v\u1edbi thi\u1ebft k\u1ebf m\u1ea1ng m\u00e0 c\u00f2n \u0111\u1ed1i v\u1edbi hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 \u0111\u1ed9 tin c\u1eady. Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u00f4-\u0111un quang h\u1ecdc ph\u00f9 h\u1ee3p \u0111\u00f2i h\u1ecfi \u0111\u00e1nh gi\u00e1 nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m lo\u1ea1i s\u1ee3i quang, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-wavelengths-850nm-1310nm-1550nm-guide\/\">b\u01b0\u1edbc s\u00f3ng<\/a> (850nm so v\u1edbi 1310nm), ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf\u2014thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ghi tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch r\u00f5 \u201ckho\u1ea3ng c\u00e1ch SFP\u201d th\u1ef1c ch\u1ea5t ngh\u0129a l\u00e0 g\u00ec, c\u00e1ch x\u00e1c \u0111\u1ecbnh n\u00f3, l\u00fd do hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf th\u01b0\u1eddng kh\u00e1c bi\u1ec7t so v\u1edbi gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft, v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn \u0111\u00fang m\u00f4-\u0111un SFP nh\u1eb1m \u0111\u1ea3m b\u1ea3o tri\u1ec3n khai m\u1ea1ng \u1ed5n \u0111\u1ecbnh v\u00e0 m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 Kho\u1ea3ng c\u00e1ch SFP trong m\u1ea1ng quang h\u1ecdc l\u00e0 g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0.jpg\" alt=\"What Is SFP Distance in Fiber Optic Networks?\" class=\"wp-image-2629\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2c558dc73da748cd9341a7953f498de0-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ecbnh ngh\u0129a kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch SFP \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ph\u1ea1m vi t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 m\u00e0 m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476091.htm\">Module quang SFP<\/a> c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u trong khi v\u1eabn duy tr\u00ec \u0111\u1ed9 to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u. Th\u00f4ng s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng kil\u00f4m\u00e9t (km) \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang ho\u1eb7c b\u1eb1ng m\u00e9t \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ebft n\u1ed1i \u0111a ch\u1ebf \u0111\u1ed9 t\u1ea7m ng\u1eafn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh c\u1ed1 \u0111\u1ecbnh c\u1ee7a khe SFP hay b\u1ed9 chuy\u1ec3n m\u1ea1ch. Thay v\u00e0o \u0111\u00f3, \u0111\u00e2y l\u00e0 th\u00f4ng s\u1ed1 do b\u1ed9 thu ph\u00e1t quang x\u00e1c \u0111\u1ecbnh, cho bi\u1ebft kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a m\u00e0 t\u00edn hi\u1ec7u quang c\u00f3 th\u1ec3 truy\u1ec1n \u0111i tr\u01b0\u1edbc khi tr\u1edf n\u00ean qu\u00e1 y\u1ebfu (suy hao) ho\u1eb7c m\u00e9o d\u1ea1ng \u0111\u1ebfn m\u1ee9c kh\u00f4ng th\u1ec3 nh\u1eadn m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t th\u1ef1c ti\u1ec5n, kho\u1ea3ng c\u00e1ch SFP bi\u1ec3u th\u1ecb ph\u1ea1m vi truy\u1ec1n d\u1eabn kh\u1ea3 d\u1ee5ng trong \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m chu\u1ea9n h\u00f3a, gi\u1ea3 \u0111\u1ecbnh lo\u1ea1i s\u1ee3i quang ph\u00f9 h\u1ee3p, \u0111\u1ea7u n\u1ed1i s\u1ea1ch v\u00e0 m\u1ee9c c\u00f4ng su\u1ea5t quang tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao kho\u1ea3ng c\u00e1ch ph\u1ee5 thu\u1ed9c v\u00e0o quang h\u1ecdc, ch\u1ee9 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 c\u1ed5ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong m\u1ea1ng m\u00e1y t\u00ednh l\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n \u0111\u1ed3ng ngh\u0129a t\u1ef1 \u0111\u1ed9ng v\u1edbi kho\u1ea3ng c\u00e1ch truy\u1ec1n ng\u1eafn h\u01a1n. Th\u1ef1c t\u1ebf, kho\u1ea3ng c\u00e1ch SFP \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi \u0111\u1eb7c t\u00ednh quang h\u1ecdc c\u1ee7a b\u1ed9 thu ph\u00e1t, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1ed1c \u0111\u1ed9 Ethernet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng quang (v\u00ed d\u1ee5: 850 nm, 1310 nm, 1550 nm)<\/p><\/li><li><p>C\u00f4ng su\u1ea5t ph\u00e1t ra c\u1ee7a b\u1ed9 ph\u00e1t<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y b\u1ed9 thu<\/p><\/li><li><p>T\u1ef7 l\u1ec7 suy hao s\u1ee3i quang (t\u1ed5n hao tr\u00ean km)<\/p><\/li><li><p>Suy hao t\u1ea1i \u0111i\u1ec3m n\u1ed1i v\u00e0 m\u1ed1i h\u00e0n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t <strong>850nm <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\"><strong>SR<\/strong><\/a> \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 v\u00e0 truy\u1ec1n d\u1eabn t\u1ea7m ng\u1eafn.<\/p><\/li><li><p>A <strong>1310nm <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\"><strong>M\u00f4-\u0111un LR<\/strong><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho s\u1ee3i quang \u0111\u01a1n ch\u1ebf \u0111\u1ed9 v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u00e0i h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi c\u1ea3 hai m\u00f4-\u0111un ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau (1G, 2,5G ho\u1eb7c 10G), gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch c\u1ee7a ch\u00fang v\u1eabn ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o v\u1eadt l\u00fd quang h\u1ecdc \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u0103ng th\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491470.htm\">M\u00f4-\u0111un SFP 2,5G<\/a> \u0111\u00f4i khi c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u1ea1m vi t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">SFP 1G<\/a>, mi\u1ec5n l\u00e0 thi\u1ebft k\u1ebf quang h\u1ecdc (b\u01b0\u1edbc s\u00f3ng v\u00e0 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t) l\u00e0 nh\u01b0 nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ed1i quan h\u1ec7 gi\u1eefa SFP, SFP+ v\u00e0 SFP 2,5G<\/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;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea1m vi kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh<br><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476091.htm\"><strong>SFP<\/strong><\/a><strong> (Ethernet 1G)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1000BASE-SX \/ LX \/ ZX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SR: l\u00ean t\u1edbi ~550 m (s\u1ee3i \u0111a ch\u1ebf \u0111\u1ed9 \u2013 MMF) <br\/>LR: l\u00ean t\u1edbi ~10 km (s\u1ee3i \u0111\u01a1n ch\u1ebf \u0111\u1ed9 \u2013 SMF) <br\/>ER\/ZR: 40\u201380 km tr\u1edf l\u00ean<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476064.htm\"><strong>SFP+<\/strong><\/a><strong> (Ethernet 10G)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10GBASE-SR \/ LR \/ ER<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SR: ~300\u2013400 m (MMF) <br\/>LR: ~10 km (SMF) <br\/>ER: ~40 km tr\u1edf l\u00ean<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476830.htm\"><strong>SFP 2,5G<\/strong><\/a><strong> (2,5GbE)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c bi\u1ebfn th\u1ec3 2,5GBASE<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i SR: h\u00e0ng tr\u0103m m\u00e9t (MMF) <br\/>Lo\u1ea1i LR: l\u00ean t\u1edbi ~10 km (SMF)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn th\u1ee9c c\u1ed1t l\u00f5i: \u201cL\u1edbp SFP\u201d (SFP, SFP+, SFP 2,5G) x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng t\u1ed1c \u0111\u1ed9, trong khi kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi thi\u1ebft k\u1ebf quang h\u1ecdc (SR, LR, ER) v\u00e0 lo\u1ea1i s\u1ee3i quang (MMF so v\u1edbi SMF).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1ea3i th\u00edch n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb g\u00f3c \u0111\u1ed9 k\u1ef9 thu\u1eadt, kho\u1ea3ng c\u00e1ch SFP \u0111\u01b0\u1ee3c chi ph\u1ed1i b\u1edfi l\u00fd thuy\u1ebft ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang h\u1ecdc, \u0111\u1ea3m b\u1ea3o r\u1eb1ng:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>C\u00f4ng su\u1ea5t quang ph\u00e1t \u0111i (TX) tr\u1eeb \u0111i to\u00e0n b\u1ed9 t\u1ed5n hao (suy hao s\u1ee3i quang + \u0111\u1ea7u n\u1ed1i + m\u1ed1i h\u00e0n) v\u1eabn ph\u1ea3i cao h\u01a1n ng\u01b0\u1ee1ng \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean l\u00fd n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady c\u1ee7a t\u00edn hi\u1ec7u trong c\u00e1c m\u00f4i tr\u01b0\u1eddng tri\u1ec3n khai kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t bi\u1ec3u di\u1ec5n \u0111\u01a1n gi\u1ea3n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng = C\u00f4ng su\u1ea5t TX \u2212 \u0110\u1ed9 nh\u1ea1y RX<\/strong><\/p><\/li><li><p><strong>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft = T\u1ed5n hao s\u1ee3i quang + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + \u0110\u1ec7m an to\u00e0n<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng, k\u1ebft n\u1ed1i s\u1ebd th\u1ea5t b\u1ea1i ho\u1eb7c tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh\u2014ngay c\u1ea3 khi s\u1ee3i quang v\u1ec1 m\u1eb7t v\u1eadt l\u00fd c\u00f3 chi\u1ec1u d\u00e0i ng\u1eafn h\u01a1n th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c c\u1ee7a module.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m kh\u00f4ng bao gi\u1edd ch\u1ec9 d\u1ef1a v\u00e0o nh\u00e3n kho\u1ea3ng c\u00e1ch. Thay v\u00e0o \u0111\u00f3, h\u1ecd x\u00e1c th\u1ef1c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch lo\u1ea1i s\u1ee3i quang (SMF so v\u1edbi MMF)<\/p><\/li><li><p>S\u1ef1 kh\u1edbp b\u01b0\u1edbc s\u00f3ng<\/p><\/li><li><p>\u0110\u1ec7m ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t (th\u00f4ng th\u01b0\u1eddng l\u00e0 \u0111\u1ec7m an to\u00e0n 3\u20135 dB)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng nh\u1eefng nguy\u00ean l\u00fd n\u00e0y, kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng c\u00f2n ch\u1ec9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt\u2014m\u00e0 tr\u1edf th\u00e0nh m\u1ed9t k\u1ebft qu\u1ea3 k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 d\u1ef1 b\u00e1o \u0111\u01b0\u1ee3c, d\u1ef1a tr\u00ean v\u1eadt l\u00fd quang h\u1ecdc v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 C\u00e1c d\u1ea3i kho\u1ea3ng c\u00e1ch SFP theo lo\u1ea1i quang h\u1ecdc (SR, LR, ER, ZR)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch SFP ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/blog\/knowledge-center\/types-of-sfp-modules-1g-10g-and-25g-network-guide.htm\">lo\u1ea1i b\u1ed9 thu ph\u00e1t quang<\/a>, ch\u1ee9 kh\u00f4ng ph\u1ea3i thi\u1ebft b\u1ecb hay t\u1ed1c \u0111\u1ed9 Ethernet. M\u1ed7i l\u1edbp quang h\u1ecdc\u2014SR, LR, ER v\u00e0 ZR\u2014tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf v\u1eadt l\u00fd kh\u00e1c nhau, quy \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a m\u00e0 t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 truy\u1ec1n t\u1ea3i \u0111\u00e1ng tin c\u1eady tr\u00ean s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c danh m\u1ee5c n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu, b\u1edfi hi\u1ec7u n\u0103ng m\u1ea1ng th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 quang ph\u00f9 h\u1ee3p cho kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn y\u00eau c\u1ea7u v\u00e0 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 decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7.jpg\" alt=\"SFP Distance Ranges by Optical Type (SR, LR, ER, ZR)\" class=\"wp-image-2630\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2f6214e8eb534557bec766ff65f2d0d7-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >1000BASE-SX \/ SR (Ph\u1ea1m vi ng\u1eafn, \u0111a mode)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SR (Ph\u1ea1m vi ng\u1eafn) ho\u1eb7c <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">b\u1ed9 quang SX<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n d\u1eabn kho\u1ea3ng c\u00e1ch ng\u1eafn tr\u00ean s\u1ee3i quang \u0111a mode (MMF), s\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng 850 nm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7c \u0111i\u1ec3m \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng: 850 nm (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/overview-of-vcsel\/\">Laser VCSEL<\/a>)<\/p><\/li><li><p>Lo\u1ea1i s\u1ee3i: \u0110a mode (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/om1-om2-om3-om4-om5-multimode-fiber-guide\/\">OM1 \/ OM2 \/ OM3 \/ OM4<\/a>)<\/p><\/li><li><p>Ph\u1ea1m vi kho\u1ea3ng c\u00e1ch ph\u1ed5 bi\u1ebfn:<\/p><ul><li><p>~275 m (OM1)<\/p><\/li><li><p>~550 m (\u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u h\u00f3a OM3\/OM4)<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Trung t\u00e2m d\u1eef li\u1ec7u (k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c rack)<\/p><\/li><li><p>\u0110\u01b0\u1eddng c\u00e1p l\u00f5i LAN doanh nghi\u1ec7p trong c\u00f9ng m\u1ed9t t\u00f2a nh\u00e0<\/p><\/li><li><p>Chuy\u1ec3n m\u1ea1ch m\u1eadt \u0111\u1ed9 cao, ph\u1ea1m vi ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea1n ch\u1ebf ch\u00ednh: C\u00e1c b\u1ed9 quang SR r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p quang v\u00e0 s\u1ef1 t\u00e1n s\u1eafc mode, ngh\u0129a l\u00e0 hi\u1ec7u n\u0103ng gi\u1ea3m \u0111\u00e1ng k\u1ec3 n\u1ebfu s\u1eed d\u1ee5ng c\u00e1p quang \u0111a mode c\u0169 ho\u1eb7c c\u1ea5p th\u1ea5p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >1000BASE-LX \/ LR (\u0110\u01a1n mode t\u1ea7m xa)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 quang LR (T\u1ea7m xa) l\u00e0 lo\u1ea1i SFP ph\u1ed5 bi\u1ebfn nh\u1ea5t cho doanh nghi\u1ec7p v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-an-isp-internet-service-provider\/\">However, many beginners are confused by common questions such as:<\/a> c\u00e1c tri\u1ec3n khai y\u00eau c\u1ea7u kho\u1ea3ng c\u00e1ch truy\u1ec1n xa h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7c \u0111i\u1ec3m \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng: 1310nm<\/p><\/li><li><p>Lo\u1ea1i c\u00e1p quang: C\u00e1p quang \u0111\u01a1n mode (OS1 \/ OS2)<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch ti\u00eau chu\u1ea9n:<\/p><ul><li><p>L\u00ean \u0111\u1ebfn ~10 km (c\u00e1c phi\u00ean b\u1ea3n 1G v\u00e0 2,5G)<\/p><\/li><li><p>\u0110\u00f4i khi ng\u1eafn h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n h\u1ed7n h\u1ee3p ho\u1eb7c kh\u00f4ng l\u00fd t\u01b0\u1edfng<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea1ng khu\u00f4n vi\u00ean<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-metropolitan-area-network\/\">M\u1ea1ng khu v\u1ef1c \u0111\u00f4 th\u1ecb <\/a>(MAN)<\/p><\/li><li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u00f2a nh\u00e0 doanh nghi\u1ec7p<\/p><\/li><li><p>M\u1ea1ng truy nh\u1eadp c\u1ee7a ISP<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u01afu \u0111i\u1ec3m ch\u00ednh: C\u00e1p quang \u0111\u01a1n mode l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 s\u1ef1 t\u00e1n s\u1eafc t\u00edn hi\u1ec7u, cho ph\u00e9p truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa v\u1edbi suy hao th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111a mode.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 quang t\u1ea7m xa m\u1edf r\u1ed9ng (ER \/ ZR)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi truy\u1ec1n th\u00f4ng \u0111\u01b0\u1eddng d\u00e0i,<strong> <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475852.htm\">ER<\/a> (T\u1ea7m xa m\u1edf r\u1ed9ng) v\u00e0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476089.htm\">ZR <\/a>(T\u1ea7m xa zettabyte) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng x\u01b0\u01a1ng s\u1ed1ng hi\u1ec7u n\u0103ng cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1eb7c \u0111i\u1ec3m \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng: 1550 nm (ph\u1ed5 bi\u1ebfn cho truy\u1ec1n th\u00f4ng \u0111\u01b0\u1eddng d\u00e0i)<\/p><\/li><li><p>Lo\u1ea1i c\u00e1p quang: \u0110\u01a1n mode (OS2 ch\u1ea5t l\u01b0\u1ee3ng cao)<\/p><\/li><li><p>Ph\u1ea1m vi kho\u1ea3ng c\u00e1ch:<\/p><ul><li><p>ER: ~40 km<\/p><\/li><li><p>ZR: ~80 km tr\u1edf l\u00ean (t\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng)<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c m\u1ea1ng l\u00f5i vi\u1ec5n th\u00f4ng<\/p><\/li><li><p>M\u1ea1ng v\u00f2ng li\u00ean th\u00e0nh ph\u1ed1 ho\u1eb7c khu v\u1ef1c \u0111\u00f4 th\u1ecb<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ISP quy m\u00f4 l\u1edbn<\/p><\/li><li><p>K\u1ebft n\u1ed1i trung t\u00e2m d\u1eef li\u1ec7u (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/data-center-interconnect-definition-benefits-and-role-of-optical-modules\/\">DCI<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u01b0u \u00fd quan tr\u1ecdng: C\u00e1c b\u1ed9 quang n\u00e0y th\u01b0\u1eddng y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t nghi\u00eam ng\u1eb7t h\u01a1n v\u1ec1 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang, bao g\u1ed3m l\u1eadp k\u1ebf ho\u1ea1ch suy hao \u0111\u1ec3 tr\u00e1nh qu\u00e1 t\u1ea3i b\u1ed9 thu tr\u00ean c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n ng\u1eafn h\u01a1n d\u1ef1 ki\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf trong th\u1ebf gi\u1edbi th\u1ef1c so v\u1edbi kho\u1ea3ng c\u00e1ch l\u00fd thuy\u1ebft<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 b\u1ea3ng d\u1eef li\u1ec7u x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a l\u00fd thuy\u1ebft, hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf c\u1ee7a SFP th\u01b0\u1eddng kh\u00e1c bi\u1ec7t do \u0111i\u1ec1u ki\u1ec7n tri\u1ec3n khai.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd thuy\u1ebft (\u0110i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p quang s\u1ea1ch v\u1edbi t\u1ed5n hao t\u1ed1i thi\u1ec3u<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i l\u00fd t\u01b0\u1edfng<\/p><\/li><li><p>M\u1ee9c c\u00f4ng su\u1ea5t ti\u00eau chu\u1ea9n h\u00f3a<\/p><\/li><li><p>Kh\u00f4ng c\u00f3 nhi\u1ec5u m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u00e3o h\u00f3a v\u00e0 nhi\u1ec5m b\u1ea9n c\u00e1p quang<\/p><\/li><li><p>T\u1ed5n hao t\u1ea1i b\u1ea3ng \u0111\u1ea5u n\u1ed1i v\u00e0 \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>B\u00e1n k\u00ednh u\u1ed1n c\u00e1p kh\u00f4ng \u0111\u00fang quy c\u00e1ch<\/p><\/li><li><p>Tr\u1ed9n l\u1eabn c\u00e1c lo\u1ea1i c\u00e1p quang ho\u1eb7c c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u0169<\/p><\/li><li><p>S\u1ef1 sai l\u1ec7ch trong dung sai s\u1ea3n xu\u1ea5t b\u1ed9 thu ph\u00e1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong> K\u1ebft qu\u1ea3 l\u00e0:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t module LR \u201c10 km\u201d c\u00f3 th\u1ec3 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch 6\u20138 km trong c\u00e1c l\u1eafp \u0111\u1eb7t k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng<\/p><\/li><li><p>M\u1ed9t li\u00ean k\u1ebft SR t\u1ea7m ng\u1eafn c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i d\u01b0\u1edbi kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c n\u1ebfu ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p quang b\u1ecb suy gi\u1ea3m<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1nh gi\u00e1 kho\u1ea3ng c\u00e1ch SFP l\u00e0 c\u00e1c m\u1ed1c k\u1ef9 thu\u1eadt, kh\u00f4ng ph\u1ea3i l\u00e0 cam k\u1ebft \u0111\u1ea3m b\u1ea3o. Vi\u1ec7c tri\u1ec3n khai th\u00e0nh c\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c kh\u1edbp c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i quang h\u1ecdc (SR \/ LR \/ ER \/ ZR)<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang<\/p><\/li><li><p>D\u1ef1 ph\u00f2ng ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n<\/p><\/li><li><p>\u0110i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao c\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m lu\u00f4n thi\u1ebft k\u1ebf v\u1edbi m\u1ed9t <strong>d\u1ef1 ph\u00f2ng an to\u00e0n (th\u01b0\u1eddng l\u00e0 3\u20135 dB)<\/strong> thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o th\u00f4ng s\u1ed1 kho\u1ea3ng c\u00e1ch do nh\u00e0 s\u1ea3n xu\u1ea5t cung c\u1ea5p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 So s\u00e1nh SFP 850nm v\u00e0 1310nm: B\u01b0\u1edbc s\u00f3ng \u1ea3nh h\u01b0\u1edfng th\u1ebf n\u00e0o \u0111\u1ebfn kho\u1ea3ng c\u00e1ch?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng kho\u1ea3ng c\u00e1ch c\u1ee7a SFP. Ngay c\u1ea3 khi hai module c\u00f3 c\u00f9ng t\u1ed1c \u0111\u1ed9 (1G, 2,5G ho\u1eb7c 10G), vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa quang h\u1ecdc 850nm v\u00e0 1310nm s\u1ebd l\u00e0m thay \u0111\u1ed5i c\u0103n b\u1ea3n kho\u1ea3ng c\u00e1ch t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 truy\u1ec1n \u0111i v\u00e0 m\u1ee9c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a li\u00ean k\u1ebft trong tri\u1ec3n khai th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 tr\u00e1nh th\u1ea5t b\u1ea1i li\u00ean k\u1ebft, m\u1ea5t \u1ed5n \u0111\u1ecbnh ho\u1eb7c chi ph\u00ed kh\u00f4ng c\u1ea7n thi\u1ebft trong thi\u1ebft k\u1ebf m\u1ea1ng c\u00e1p quang.<\/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\/48111bebc22d4a5da3c67399963e60a8.jpg\" alt=\"850nm vs. 1310nm SFP: How Wavelength Impacts Distance\" class=\"wp-image-2631\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/48111bebc22d4a5da3c67399963e60a8.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/48111bebc22d4a5da3c67399963e60a8-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/48111bebc22d4a5da3c67399963e60a8-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/48111bebc22d4a5da3c67399963e60a8-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/48111bebc22d4a5da3c67399963e60a8-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >850nm (\u0110a mode, d\u1ef1a tr\u00ean VCSEL, t\u1ea7m ng\u1eafn)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476073.htm\">Module SFP 850nm<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n th\u00f4ng t\u1ea7m ng\u1eafn tr\u00ean c\u00e1p quang \u0111a mode (MMF) b\u1eb1ng c\u00f4ng ngh\u1ec7 laser ph\u00e1t x\u1ea1 b\u1ec1 m\u1eb7t h\u1ed1c \u0111\u1ee9ng (VCSEL).<\/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>B\u01b0\u1edbc s\u00f3ng: 850nm<\/p><\/li><li><p>Lo\u1ea1i c\u00e1p: \u0110a mode (OM1 \/ OM2 \/ OM3 \/ OM4)<\/p><\/li><li><p>Ph\u1ea1m vi truy\u1ec1n d\u1eabn:<\/p><ul><li><p>Th\u00f4ng th\u01b0\u1eddng t\u1ed1i \u0111a kho\u1ea3ng ~300m\u2013550m t\u00f9y theo c\u1ea5p \u0111\u1ed9 c\u00e1p<\/p><\/li><\/ul><\/li><li><p>\u0110\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho:<\/p><ul><li><p>M\u00f4i tr\u01b0\u1eddng kho\u1ea3ng c\u00e1ch ng\u1eafn, m\u1eadt \u0111\u1ed9 cao<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i gi\u1eefa c\u00e1c t\u1ee7 m\u00e1y trong trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/li><li><p>C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch LAN doanh nghi\u1ec7p trong c\u00f9ng m\u1ed9t t\u00f2a nh\u00e0<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft truy c\u1eadp m\u00e1y ch\u1ee7 t\u1ed1c \u0111\u1ed9 cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea1n ch\u1ebf ch\u00ednh: C\u00e1p quang \u0111a mode g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc mode, khi c\u00e1c t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng lan truy\u1ec1n theo nhi\u1ec1u \u0111\u01b0\u1eddng kh\u00e1c nhau, d\u1eabn \u0111\u1ebfn gi\u00e3n n\u1edf t\u00edn hi\u1ec7u theo kho\u1ea3ng c\u00e1ch. \u0110i\u1ec1u n\u00e0y gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady c\u1ee7a quang h\u1ecdc 850nm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >1310nm (\u0110\u01a1n mode, t\u1ea7m xa, truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP 1310nm \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n th\u00f4ng t\u1ea7m trung \u0111\u1ebfn t\u1ea7m xa s\u1eed d\u1ee5ng c\u00e1p quang \u0111\u01a1n mode (SMF).<\/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>B\u01b0\u1edbc s\u00f3ng: 1310nm<\/p><\/li><li><p>Lo\u1ea1i c\u00e1p: \u0110\u01a1n mode (OS1 \/ OS2)<\/p><\/li><li><p>Ph\u1ea1m vi truy\u1ec1n d\u1eabn:<\/p><ul><li><p>Th\u00f4ng th\u01b0\u1eddng l\u00ean t\u1edbi ~10 km (quang h\u1ecdc LR ti\u00eau chu\u1ea9n)<\/p><\/li><li><p>C\u00f3 th\u1ec3 m\u1edf r\u1ed9ng xa h\u01a1n v\u1edbi c\u00e1c bi\u1ebfn th\u1ec3 ER\/ZR<\/p><\/li><\/ul><\/li><li><p>\u0110\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho:<\/p><ul><li><p>Truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch d\u00e0i<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft n\u1ed9i khu v\u1ef1c (campus)<\/p><\/li><li><p>M\u1ea1ng \u0111\u00f4 th\u1ecb<\/p><\/li><li><p>M\u1ea1ng truy nh\u1eadp c\u1ee7a ISP<\/p><\/li><li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt: C\u00e1p quang \u0111\u01a1n mode cho ph\u00e9p \u00e1nh s\u00e1ng lan truy\u1ec1n theo m\u1ed9t \u0111\u01b0\u1eddng duy nh\u1ea5t, gi\u1ea3m \u0111\u00e1ng k\u1ec3 hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc v\u00e0 cho ph\u00e9p \u0111\u1ea1t kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i h\u01a1n nhi\u1ec1u c\u0169ng nh\u01b0 \u1ed5n \u0111\u1ecbnh h\u01a1n so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111a mode.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ea1i sao b\u01b0\u1edbc s\u00f3ng x\u00e1c \u0111\u1ecbnh h\u00e0nh vi suy hao<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c \u0111\u1ed9ng c\u1ee7a b\u01b0\u1edbc s\u00f3ng \u0111\u1ed1i v\u1edbi kho\u1ea3ng c\u00e1ch SFP g\u1eafn tr\u1ef1c ti\u1ebfp v\u1edbi c\u00e1ch \u00e1nh s\u00e1ng h\u00e0nh x\u1eed trong c\u00e1p quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd ch\u00ednh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>T\u1ed5n hao suy hao thay \u0111\u1ed5i theo b\u01b0\u1edbc s\u00f3ng<\/strong><\/p><ul><li><p>850nm: suy hao cao h\u01a1n trong s\u1ee3i quang theo kho\u1ea3ng c\u00e1ch<\/p><\/li><li><p>1310nm: suy hao th\u1ea5p h\u01a1n, hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n tr\u00ean kho\u1ea3ng c\u00e1ch xa<\/p><\/li><\/ul><\/li><li><p><strong>S\u1ef1 kh\u00e1c bi\u1ec7t trong t\u01b0\u01a1ng t\u00e1c v\u1edbi s\u1ee3i quang<\/strong><\/p><ul><li><p>S\u1ee3i \u0111a mode \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho c\u00e1c b\u01b0\u1edbc s\u00f3ng ng\u1eafn h\u01a1n (850nm)<\/p><\/li><li><p>S\u1ee3i \u0111\u01a1n mode \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho c\u00e1c b\u01b0\u1edbc s\u00f3ng d\u00e0i h\u01a1n (1310nm \/ 1550nm)<\/p><\/li><\/ul><\/li><li><p><strong>H\u00e0nh vi t\u00e1n s\u1eafc t\u00edn hi\u1ec7u<\/strong><\/p><ul><li><p>850nm: t\u00e1n s\u1eafc mode cao h\u01a1n \u2192 gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch<\/p><\/li><li><p>1310nm: t\u00e1n s\u1eafc t\u1ed1i thi\u1ec3u \u2192 h\u1ed7 tr\u1ee3 t\u1ea7m xa h\u01a1n<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n: 850nm \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho t\u1ed1c \u0111\u1ed9 tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn, trong khi 1310nm \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng sai l\u1ea7m tri\u1ec3n khai ph\u1ed5 bi\u1ebfn m\u00e0 ng\u01b0\u1eddi d\u00f9ng m\u1eafc ph\u1ea3i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 c\u00f3 c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt r\u00f5 r\u00e0ng, nh\u01b0ng c\u00e1c l\u1ed7i tri\u1ec3n khai li\u00ean quan \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng v\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u274c Sai l\u1ea7m 1: S\u1eed d\u1ee5ng quang h\u1ecdc 850nm tr\u00ean s\u1ee3i \u0111\u01a1n mode<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Th\u01b0\u1eddng b\u1ecb nh\u1ea7m t\u01b0\u1edfng l\u00e0 c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau<\/p><\/li><li><p>K\u1ebft qu\u1ea3: t\u00edn hi\u1ec7u y\u1ebfu ho\u1eb7c kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u do kh\u00f4ng kh\u1edbp s\u1ee3i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u274c Sai l\u1ea7m 2: S\u1eed d\u1ee5ng quang h\u1ecdc 1310nm cho c\u00e1c li\u00ean k\u1ebft \u0111a mode ng\u1eafn<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u<\/p><\/li><li><p>G\u00e2y hi\u1ec7u su\u1ea5t k\u00e9m ho\u1eb7c m\u1ea5t \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u274c Sai l\u1ea7m 3: B\u1ecf qua ho\u00e0n to\u00e0n lo\u1ea1i s\u1ee3i quang<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u01b0\u1eddi d\u00f9ng t\u1eadp trung v\u00e0o \u201c2,5G hay 10G\u201d nh\u01b0ng b\u1ecf qua s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MMF v\u00e0 SMF<\/p><\/li><li><p>D\u1eabn \u0111\u1ebfn l\u1ed7i li\u00ean k\u1ebft b\u1ea5t ng\u1edd<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u274c Sai l\u1ea7m 4: Gi\u1ea3 \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kho\u1ea3ng c\u00e1ch<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn \u1edf ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/p><\/li><li><p>D\u1eabn \u0111\u1ebfn l\u1ef1a ch\u1ecdn module sai v\u00e0 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa module SFP 850nm v\u00e0 1310nm kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u2014 n\u00f3 tr\u1ef1c ti\u1ebfp quy\u1ebft \u0111\u1ecbnh li\u1ec7u m\u1ed9t li\u00ean k\u1ebft c\u00f3 kh\u1ea3 n\u0103ng v\u1ec1 m\u1eb7t v\u1eadt l\u00fd \u0111\u1ea1t \u0111\u01b0\u1ee3c kho\u1ea3ng c\u00e1ch y\u00eau c\u1ea7u hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tri\u1ec3n khai \u0111\u00e1ng tin c\u1eady:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <strong>850 nm (SR)<\/strong> d\u00e0nh cho m\u00f4i tr\u01b0\u1eddng \u0111a mode c\u1ef1 ly ng\u1eafn<\/p><\/li><li><p>S\u1eed d\u1ee5ng <strong>1310 nm (LR)<\/strong> d\u00e0nh cho m\u1ea1ng \u0111\u01a1n mode \u1ed5n \u0111\u1ecbnh c\u1ef1 ly xa<\/p><\/li><li><p>Lu\u00f4n gh\u00e9p b\u01b0\u1edbc s\u00f3ng ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i s\u1ee3i v\u00e0 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft d\u1ef1 ki\u1ebfn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u0111\u1ed3ng b\u1ed9 n\u00e0y l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t kho\u1ea3ng c\u00e1ch SFP c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c trong c\u00e1c m\u1ea1ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 T\u1ea1i sao kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf c\u1ee7a SFP th\u01b0\u1eddng kh\u00e1c bi\u1ec7t so v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">C\u00e1c m\u00f4-\u0111un SFP<\/a> \u0111\u01b0\u1ee3c g\u1eafn nh\u00e3n v\u1edbi c\u00e1c x\u1ebfp h\u1ea1ng kho\u1ea3ng c\u00e1ch r\u00f5 r\u00e0ng nh\u01b0 550 m, 10 km ho\u1eb7c 40 km, nh\u01b0ng trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf th\u01b0\u1eddng cho th\u1ea5y k\u1ebft qu\u1ea3 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3. Tr\u00ean th\u1ef1c t\u1ebf, kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn th\u1ef1c t\u1ebf c\u1ee7a SFP b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c bi\u1ebfn s\u1ed1 m\u00f4i tr\u01b0\u1eddng, v\u1eadt l\u00fd v\u00e0 k\u1ef9 thu\u1eadt kh\u00f4ng \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh \u0111\u1ea7y \u0111\u1ee7 trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng kho\u1ea3ng ch\u00eanh l\u1ec7ch n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft, s\u1ef1 c\u1ed1 b\u1ea5t ng\u1edd v\u00e0 c\u00e1c m\u1ea1ng c\u00e1p quang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c ho\u1eb7c hi\u1ec7u su\u1ea5t k\u00e9m.<\/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\/732d6dfbc63f4a64bafc5bf849db988b.jpg\" alt=\"Why Real SFP Distance Often Differs from Specifications\" class=\"wp-image-2632\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/732d6dfbc63f4a64bafc5bf849db988b.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/732d6dfbc63f4a64bafc5bf849db988b-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/732d6dfbc63f4a64bafc5bf849db988b-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/732d6dfbc63f4a64bafc5bf849db988b-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/732d6dfbc63f4a64bafc5bf849db988b-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang v\u00e0 t\u1ed5n hao ch\u00e8n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf c\u1ee7a SFP l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi lo\u1ea1i s\u1ee3i quang (\u0111\u01a1n mode ho\u1eb7c \u0111a mode) l\u00e0 \u0111\u00fang, hi\u1ec7u n\u0103ng v\u1eabn c\u00f3 th\u1ec3 thay \u0111\u1ed5i do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang gi\u00e0 c\u1ed7i ho\u1eb7c suy gi\u1ea3m<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t k\u00e9m \u1edf c\u00e1c c\u00e1p c\u1ea5p th\u1ea5p<\/p><\/li><li><p>U\u1ed1n cong qu\u00e1 m\u1ee9c ho\u1eb7c ch\u1ecbu \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc tr\u00ean \u0111\u01b0\u1eddng \u0111i c\u1ee7a s\u1ee3i quang<\/p><\/li><li><p>C\u00e1c \u0111i\u1ec3m n\u1ed1i g\u00e2y th\u00eam t\u1ed5n hao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ec1u g\u00f3p ph\u1ea7n v\u00e0o <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-insertion-loss-definition-impact\/\">t\u1ed5n hao ch\u00e8n<\/a>, l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang khi n\u00f3 lan truy\u1ec1n d\u1ecdc theo li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c \u0111\u1ed9ng ch\u00ednh: T\u1ed5n hao ch\u00e8n cao h\u01a1n l\u00e0m gi\u1ea3m kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c, ngay c\u1ea3 khi m\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho ho\u1ea1t \u0111\u1ed9ng t\u1ea7m xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nhi\u1ec5m b\u1ea9n \u0111\u1ea7u n\u1ed1i v\u00e0 suy hao<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, \u0111\u1ea7u n\u1ed1i s\u1ee3i quang l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y suy gi\u1ea3m hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ee5i, d\u1ea7u ho\u1eb7c c\u00e1c m\u1ea3nh v\u1ee5n vi m\u00f4 tr\u00ean \u0111\u1ea7u n\u1ed1i LC\/SC c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u0103ng ph\u1ea3n x\u1ea1 t\u00edn hi\u1ec7u (ph\u1ea3n t\u00e1n ng\u01b0\u1ee3c)<\/p><\/li><li><p>C\u00e1c \u0111\u1ec9nh suy hao b\u1ea5t ng\u1edd<\/p><\/li><li><p>Hi\u1ec7u n\u0103ng li\u00ean k\u1ebft gi\u00e1n \u0111o\u1ea1n ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf nhi\u1ec5m b\u1ea9n c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t c\u00f4ng su\u1ea5t quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh ng\u00e0nh: C\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m th\u01b0\u1eddng coi vi\u1ec7c l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i l\u00e0 b\u01b0\u1edbc ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 h\u00e0ng \u0111\u1ea7u tr\u01b0\u1edbc khi thay th\u1ebf b\u1ea5t k\u1ef3 ph\u1ea7n c\u1ee9ng n\u00e0o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Sai s\u00f3t trong t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t nguy\u00ean nh\u00e2n l\u1edbn g\u00e2y th\u1ea5t b\u1ea1i v\u1ec1 kho\u1ea3ng c\u00e1ch SFP l\u00e0 vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u00fang ph\u1ea3i t\u00ednh \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (TX) c\u1ee7a b\u1ed9 thu ph\u00e1t<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y b\u1ed9 thu<\/p><\/li><li><p>\u0110\u1ed9 suy hao s\u1ee3i quang tr\u00ean m\u1ed7i kil\u00f4m\u00e9t<\/p><\/li><li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i<\/p><\/li><li><p>D\u1ef1 ph\u00f2ng an to\u00e0n (th\u01b0\u1eddng l\u00e0 3\u20135 dB)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ecf qua t\u1ed5ng t\u1ed5n hao h\u1ec7 th\u1ed1ng<\/p><\/li><li><p>Gi\u1ea3 \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ghi tr\u00ean th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi hi\u1ec7u n\u0103ng \u0111\u1ea3m b\u1ea3o<\/p><\/li><li><p>Kh\u00f4ng t\u00ednh \u0111\u1ebfn t\u1ed5n hao t\u1ea1i b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel) ho\u1eb7c c\u00e1c \u0111i\u1ec3m n\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 qu\u1ea3: Ngay c\u1ea3 m\u1ed9t m\u00f4-\u0111un SFP \u201c<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491654.htm\">10 km\u201d<\/a>\u201d c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i \u1edf kho\u1ea3ng c\u00e1ch 6\u20138 km n\u1ebfu t\u1ed5ng t\u1ed5n hao quang v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u1ea5n \u0111\u1ec1 ch\u00eanh l\u1ec7ch c\u00f4ng su\u1ea5t b\u1ed9 thu ph\u00e1t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn kh\u00e1c l\u00e0 s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng c\u00f4ng su\u1ea5t quang gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t TX qu\u00e1 cao \u2192 qu\u00e1 t\u1ea3i b\u1ed9 thu (\u0111\u1eb7c bi\u1ec7t tr\u00ean c\u00e1c li\u00ean k\u1ebft ng\u1eafn)<\/p><\/li><li><p>C\u00f4ng su\u1ea5t TX qu\u00e1 th\u1ea5p \u2192 t\u00edn hi\u1ec7u kh\u00f4ng th\u1ec3 \u0111\u1ea1t ng\u01b0\u1ee1ng nh\u1eadn c\u1ee7a b\u1ed9 thu<\/p><\/li><li><p>S\u1eed d\u1ee5ng \u0111\u1ed3ng th\u1eddi c\u00e1c module c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t g\u1ed1c (OEM) ho\u1eb7c b\u00ean th\u1ee9 ba kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c tri\u1ec3n khai hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c switch t\u1eeb nhi\u1ec1u nh\u00e0 cung c\u1ea5p kh\u00e1c nhau<\/p><\/li><li><p>M\u00f4i tr\u01b0\u1eddng SFP c\u00f4ng nghi\u1ec7p<\/p><\/li><li><p>S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa c\u00e1c li\u00ean k\u1ebft d\u00e0i v\u00e0 ng\u1eafn trong c\u00f9ng m\u1ed9t m\u1ea1ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: Kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng ch\u1ec9 li\u00ean quan \u0111\u1ebfn vi\u1ec7c truy\u1ec1n \u0111i \u0111\u1ee7 xa \u2014 m\u00e0 c\u00f2n ph\u1ea3i \u0111\u1ea3m b\u1ea3o kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 m\u1ee9c c\u00f4ng su\u1ea5t quang an to\u00e0n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf so v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd, bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 c\u0103n ch\u1ec9nh s\u1ee3i quang ho\u00e0n h\u1ea3o<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i l\u00fd t\u01b0\u1edfng<\/p><\/li><li><p>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng ti\u00eau chu\u1ea9n h\u00f3a<\/p><\/li><li><p>Kh\u00f4ng c\u00f3 y\u1ebfu t\u1ed1 l\u00e3o h\u00f3a hay \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ef1 thay \u0111\u1ed5i c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<\/p><\/li><li><p>C\u00e1c sai s\u00f3t trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>Dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/p><\/li><li><p>C\u00e1c th\u00e0nh ph\u1ea7n m\u1ea1ng b\u1ecb l\u00e3o h\u00f3a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft qu\u1ea3 l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch ghi tr\u00ean th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt l\u00e0 gi\u1edbi h\u1ea1n l\u00fd thuy\u1ebft t\u1ed1i \u0111a<\/p><\/li><li><p>Hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh th\u1ef1c t\u1ebf th\u01b0\u1eddng th\u1ea5p h\u01a1n 10\u201330% t\u00f9y theo \u0111i\u1ec1u ki\u1ec7n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 ch\u00eanh l\u1ec7ch gi\u1eefa kho\u1ea3ng c\u00e1ch l\u00fd thuy\u1ebft v\u00e0 th\u1ef1c t\u1ebf c\u1ee7a SFP kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i s\u1ea3n ph\u1ea9m \u2014 m\u00e0 l\u00e0 h\u1ec7 qu\u1ea3 c\u1ee7a h\u00e0nh vi quang h\u1ecdc \u1edf c\u1ea5p \u0111\u1ed9 h\u1ec7 th\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng kh\u00f4ng l\u00fd t\u01b0\u1edfng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tri\u1ec3n khai \u0111\u00e1ng tin c\u1eady, k\u1ef9 s\u01b0 c\u1ea7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c<\/p><\/li><li><p>Duy tr\u00ec c\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang s\u1ea1ch v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i \u0111\u00fang c\u00e1ch<\/p><\/li><li><p>S\u1eed d\u1ee5ng c\u00e1c bi\u00ean an to\u00e0n ph\u00f9 h\u1ee3p<\/p><\/li><li><p>X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa m\u1ee9c c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 thu ph\u00e1t v\u00e0 lo\u1ea1i s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 b\u1ea3n ch\u1ea5t, kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf c\u1ee7a SFP \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ch\u1ea5t l\u01b0\u1ee3ng thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u2014 ch\u1ee9 kh\u00f4ng ch\u1ec9 b\u1edfi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a module.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 Kho\u1ea3ng c\u00e1ch SFP so v\u1edbi lo\u1ea1i s\u1ee3i quang (s\u1ee3i \u0111\u01a1n mode v\u00e0 \u0111a mode)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi module quang (SR, LR, ER), m\u00e0 c\u00f2n ph\u1ee5 thu\u1ed9c r\u1ea5t l\u1edbn v\u00e0o lo\u1ea1i s\u1ee3i quang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng. Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa s\u1ee3i quang \u0111a mode (MMF) v\u00e0 <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> (SMF) l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng nh\u1ea5t trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn kh\u1ea3 thi, hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng d\u00e0i h\u1ea1n.<\/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\/d85c71e9d410460ca39811e58cbe4cca.jpg\" alt=\"SFP Distance vs. Fiber Type (Single Mode vs. Multimode)\" class=\"wp-image-2633\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d85c71e9d410460ca39811e58cbe4cca.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d85c71e9d410460ca39811e58cbe4cca-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d85c71e9d410460ca39811e58cbe4cca-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d85c71e9d410460ca39811e58cbe4cca-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d85c71e9d410460ca39811e58cbe4cca-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c gi\u1edbi h\u1ea1n c\u1ee7a c\u00e1p \u0111a mode OM1 \/ OM2 \/ OM3 \/ OM4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1p quang \u0111a mode (MMF) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n d\u1eabn t\u1ed1c \u0111\u1ed9 cao tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn trong c\u00e1c m\u00f4i tr\u01b0\u1eddng h\u1ea1n ch\u1ebf nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 t\u00f2a nh\u00e0 doanh nghi\u1ec7p. N\u00f3 h\u1ed7 tr\u1ee3 nhi\u1ec1u \u0111\u01b0\u1eddng \u0111i c\u1ee7a \u00e1nh s\u00e1ng (c\u00e1c mode), gi\u00fap gh\u00e9p \u00e1nh s\u00e1ng d\u1ec5 d\u00e0ng h\u01a1n nh\u01b0ng g\u00e2y ra gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch do hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c lo\u1ea1i c\u00e1p \u0111a mode ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><span><strong>OM1 (62,5\/125 \u03bcm)<\/strong><\/span><\/p><ul><li><p><span>Lo\u1ea1i c\u00e1p c\u0169<\/span><\/p><\/li><li><p><span>Kho\u1ea3ng c\u00e1ch r\u1ea5t h\u1ea1n ch\u1ebf \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 hi\u1ec7n \u0111\u1ea1i<\/span><\/p><\/li><li><p><span>Th\u01b0\u1eddng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c tri\u1ec3n khai hi\u1ec7n \u0111\u1ea1i 2,5G\/10G<\/span><\/p><\/li><\/ul><\/li><li><p><span><strong>OM2 (50\/125 \u03bcm)<\/strong><\/span><\/p><ul><li><p><span>C\u1ea3i ti\u1ebfn nh\u1eb9 so v\u1edbi OM1<\/span><\/p><\/li><li><p><span>V\u1eabn c\u00f3 ph\u1ea1m vi h\u1ea1n ch\u1ebf \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 cao h\u01a1n<\/span><\/p><\/li><\/ul><\/li><li><p><span><strong>OM3 (lo\u1ea1i 50\/125 \u03bcm t\u1ed1i \u01b0u h\u00f3a cho laser)<\/strong><\/span><\/p><ul><li><p><span>Ph\u1ed5 bi\u1ebfn trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i<\/span><\/p><\/li><li><p><span>H\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 cao h\u01a1n nh\u01b0 10G\/25G tr\u00ean kho\u1ea3ng c\u00e1ch v\u1eeba ph\u1ea3i<\/span><\/p><\/li><\/ul><\/li><li><p><span><strong>OM4 (OM3 n\u00e2ng cao)<\/strong><\/span><\/p><ul><li><p><span>Hi\u1ec7u su\u1ea5t \u0111a mode t\u1ed1t nh\u1ea5t<\/span><\/p><\/li><li><p><span>Ph\u1ea1m vi truy\u1ec1n xa h\u01a1n trong trung t\u00e2m d\u1eef li\u1ec7u (nh\u01b0ng v\u1eabn b\u1ecb gi\u1edbi h\u1ea1n so v\u1edbi c\u00e1p \u0111\u01a1n mode)<\/span><\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1edbi h\u1ea1n ch\u00ednh: Ngay c\u1ea3 v\u1edbi c\u00e1p OM4 ch\u1ea5t l\u01b0\u1ee3ng cao, c\u00e1c h\u1ec7 th\u1ed1ng \u0111a mode v\u1eabn v\u1ed1n b\u1ecb gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch do t\u00e1n s\u1eafc mode.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c \u01b0u \u0111i\u1ec3m c\u1ee7a c\u00e1p \u0111\u01a1n mode OS1 \/ OS2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1p quang \u0111\u01a1n mode (SMF) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho truy\u1ec1n d\u1eabn quang kho\u1ea3ng c\u00e1ch xa v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c cao, s\u1eed d\u1ee5ng l\u00f5i nh\u1ecf h\u01a1n nhi\u1ec1u \u0111\u1ec3 \u00e1nh s\u00e1ng ch\u1ec9 truy\u1ec1n theo m\u1ed9t \u0111\u01b0\u1eddng duy nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c lo\u1ea1i c\u00e1p \u0111\u01a1n mode ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>OS1<\/strong><\/p><ul><li><p>C\u00e1p \u0111\u01a1n mode d\u00f9ng trong nh\u00e0 ho\u1eb7c m\u00f4i tr\u01b0\u1eddng ki\u1ec3m so\u00e1t<\/p><\/li><li><p>Hi\u1ec7u su\u1ea5t suy hao \u1edf m\u1ee9c v\u1eeba ph\u1ea3i<\/p><\/li><\/ul><\/li><li><p><strong>OS2<\/strong><\/p><ul><li><p>C\u00e1p \u0111\u01a1n mode d\u00f9ng ngo\u00e0i tr\u1eddi \/ chu\u1ea9n vi\u1ec5n th\u00f4ng<\/p><\/li><li><p>Suy hao th\u1ea5p h\u01a1n v\u00e0 hi\u1ec7u su\u1ea5t kho\u1ea3ng c\u00e1ch xa t\u1ed1t h\u01a1n<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch l\u00ean t\u1edbi 10 km, 40 km, 80 km ho\u1eb7c h\u01a1n t\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft b\u1ecb quang h\u1ecdc<\/p><\/li><li><p>T\u00e1n s\u1eafc mode c\u1ef1c k\u1ef3 th\u1ea5p (ch\u1ec9 m\u1ed9t \u0111\u01b0\u1eddng \u0111i c\u1ee7a \u00e1nh s\u00e1ng)<\/p><\/li><li><p>Suy gi\u1ea3m t\u00edn hi\u1ec7u \u00edt h\u01a1n khi truy\u1ec1n tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i<\/p><\/li><li><p>Ph\u00f9 h\u1ee3p h\u01a1n cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng x\u01b0\u01a1ng s\u1ed1ng c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: C\u00e1p quang \u0111\u01a1n mode l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh cho m\u1ecdi m\u1ea1ng y\u00eau c\u1ea7u truy\u1ec1n d\u1eabn SFP \u1ed5n \u0111\u1ecbnh tr\u00ean kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa lo\u1ea1i c\u00e1p v\u00e0 module SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c gh\u00e9p \u0111\u00fang lo\u1ea1i c\u00e1p v\u1edbi module quang SFP l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u00ed d\u1ee5 gh\u00e9p n\u1ed1i \u0111\u00fang:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p \u0111a mode (OM3\/OM4) \u2192 thi\u1ebft b\u1ecb quang SR 850nm<\/p><\/li><li><p>S\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (OS1\/OS2) \u2192 quang h\u1ecdc 1310nm LR ho\u1eb7c 1550nm ER<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng kh\u1edbp ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\">quang h\u1ecdc SR<\/a> tr\u00ean s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n \u2192 t\u00edn hi\u1ec7u y\u1ebfu ho\u1eb7c kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\">Quang h\u1ecdc LR<\/a> tr\u00ean s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 \u2192 hi\u1ec7u su\u1ea5t kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c kh\u00f4ng \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc quan tr\u1ecdng: Kho\u1ea3ng c\u00e1ch SFP ch\u1ec9 h\u1ee3p l\u1ec7 khi lo\u1ea1i s\u1ee3i quang v\u00e0 b\u01b0\u1edbc s\u00f3ng quang h\u1ecdc \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi m\u00f4-\u0111un k\u1ebft n\u1ed1i v\u1eadt l\u00fd, vi\u1ec7c gh\u00e9p n\u1ed1i sai th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1ea3m kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn<\/p><\/li><li><p>T\u0103ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">t\u1ef7 l\u1ec7 l\u1ed7i bit<\/a> (BER)<\/p><\/li><li><p>H\u00e0nh vi li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u00e1nh \u0111\u1ed5i chi ph\u00ed so v\u1edbi kho\u1ea3ng c\u00e1ch trong tri\u1ec3n khai<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 v\u00e0 s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n th\u01b0\u1eddng l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa r\u00e0ng bu\u1ed9c ng\u00e2n s\u00e1ch v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn y\u00eau c\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u01afu \u0111i\u1ec3m c\u1ee7a s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 (MMF):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chi ph\u00ed l\u1eafp \u0111\u1eb7t th\u1ea5p h\u01a1n<\/p><\/li><li><p>B\u1ed9 thu ph\u00e1t r\u1ebb h\u01a1n (quang h\u1ecdc SR)<\/p><\/li><li><p>Vi\u1ec7c \u0111\u1ea7u n\u1ed1i v\u00e0 l\u1eafp \u0111\u1eb7t d\u1ec5 d\u00e0ng h\u01a1n<\/p><\/li><li><p>L\u00fd t\u01b0\u1edfng cho h\u1ec7 th\u1ed1ng c\u00e1p c\u1ea5u tr\u00fac t\u1ea7m ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u01afu \u0111i\u1ec3m c\u1ee7a s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i h\u01a1n nhi\u1ec1u<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng cao h\u01a1n cho c\u00e1c n\u00e2ng c\u1ea5p trong t\u01b0\u01a1ng lai<\/p><\/li><li><p>Chi ph\u00ed thay th\u1ebf d\u00e0i h\u1ea1n th\u1ea5p h\u01a1n<\/p><\/li><li><p>Ph\u00f9 h\u1ee3p cho m\u1ea1ng khu\u00f4n vi\u00ean, m\u1ea1ng \u0111\u00f4 th\u1ecb v\u00e0 m\u1ea1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2n nh\u1eafc \u0111\u00e1nh \u0111\u1ed5i:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>MMF ti\u1ebft ki\u1ec7m chi ph\u00ed nh\u01b0ng ph\u1ea1m vi gi\u1edbi h\u1ea1n<\/p><\/li><li><p>SMF c\u00f3 chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n nh\u01b0ng kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u01b0\u1ee3t tr\u1ed9i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c: Nhi\u1ec1u t\u1ed5 ch\u1ee9c ch\u1ecdn s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n ngay c\u1ea3 cho kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u1eb1m \u0111\u1ea3m b\u1ea3o t\u00ednh s\u1eb5n s\u00e0ng cho t\u01b0\u01a1ng lai c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng v\u00e0 tr\u00e1nh chi ph\u00ed \u0111i d\u00e2y l\u1ea1i sau n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 c\u1ed1 \u0111\u1ecbnh\u2014m\u00e0 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 ph\u1ed1i h\u1ee3p gi\u1eefa lo\u1ea1i s\u1ee3i quang, thi\u1ebft k\u1ebf quang h\u1ecdc v\u00e0 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 thi\u1ebft k\u1ebf m\u1ea1ng \u0111\u00e1ng tin c\u1eady:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 cho c\u00e1c tri\u1ec3n khai t\u1ea7m ng\u1eafn, nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed<\/p><\/li><li><p>S\u1eed d\u1ee5ng s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>Lu\u00f4n \u0111\u1ed3ng b\u1ed9 lo\u1ea1i s\u1ee3i quang v\u1edbi b\u01b0\u1edbc s\u00f3ng quang h\u1ecdc c\u1ee7a SFP v\u00e0 kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft d\u1ef1 ki\u1ebfn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u0111\u1ed3ng b\u1ed9 n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c v\u00e0 ng\u0103n ng\u1eeba c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft s\u1ee3i quang trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 C\u00e1ch t\u00ednh kho\u1ea3ng c\u00e1ch SFP b\u1eb1ng Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch SFP trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf kh\u00f4ng d\u1ef1a tr\u00ean ph\u1ecfng \u0111o\u00e1n hay nh\u00e3n ghi tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u\u2014m\u00e0 d\u1ef1a tr\u00ean m\u1ed9t nguy\u00ean l\u00fd k\u1ef9 thu\u1eadt c\u01a1 b\u1ea3n g\u1ecdi l\u00e0 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang (optical link budget). Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y x\u00e1c \u0111\u1ecbnh xem m\u00f4-\u0111un SFP c\u00f3 th\u1ec3 duy tr\u00ec t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh tr\u00ean m\u1ed9t \u0111\u1ed9 d\u00e0i s\u1ee3i quang nh\u1ea5t \u0111\u1ecbnh hay kh\u00f4ng b\u1eb1ng c\u00e1ch so s\u00e1nh c\u00f4ng su\u1ea5t ph\u00e1t, \u0111\u1ed9 nh\u1ea1y nh\u1eadn v\u00e0 t\u1ed5ng t\u1ed5n hao c\u1ee7a to\u00e0n h\u1ec7 th\u1ed1ng.<\/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\/d6e85aa8bab6405792099786926a22f2.jpg\" alt=\"How to Calculate SFP Distance Using Link Budget\" class=\"wp-image-2635\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d6e85aa8bab6405792099786926a22f2.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d6e85aa8bab6405792099786926a22f2-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d6e85aa8bab6405792099786926a22f2-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d6e85aa8bab6405792099786926a22f2-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d6e85aa8bab6405792099786926a22f2-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1ea3i th\u00edch v\u1ec1 C\u00f4ng su\u1ea5t ph\u00e1t (TX Power) so v\u1edbi \u0110\u1ed9 nh\u1ea1y nh\u1eadn (RX Sensitivity)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i m\u00f4-\u0111un SFP ho\u1ea1t \u0111\u1ed9ng trong m\u1ed9t d\u1ea3i c\u00f4ng su\u1ea5t quang \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00f4ng su\u1ea5t ph\u00e1t (TX Power):<\/strong><br\/>L\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng quang do laser SFP ph\u00e1t ra.<\/p><\/li><li><p><strong>\u0110\u1ed9 nh\u1ea1y nh\u1eadn (RX Sensitivity):<\/strong><br\/>M\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang t\u1ed1i thi\u1ec3u m\u00e0 b\u1ed9 thu c\u1ea7n \u0111\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u ch\u00ednh x\u00e1c.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean l\u00fd c\u1ed1t l\u00f5i: M\u1ed9t li\u00ean k\u1ebft SFP h\u1ee3p l\u1ec7 ch\u1ec9 t\u1ed3n t\u1ea1i khi t\u00edn hi\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c m\u1ea1nh h\u01a1n ng\u01b0\u1ee1ng \u0111\u1ed9 nh\u1ea1y t\u1ed1i thi\u1ec3u c\u1ee7a b\u1ed9 thu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u1ed1i quan h\u1ec7 \u0111\u01a1n gi\u1ea3n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t cao h\u01a1n \u2192 kho\u1ea3ng c\u00e1ch kh\u1ea3 thi d\u00e0i h\u01a1n<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y nh\u1eadn t\u1ed1t h\u01a1n \u2192 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u y\u1ebfu \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y lu\u00f4n ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng \u0111\u1ec3 tr\u00e1nh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n th\u1ea5t t\u00edn hi\u1ec7u (qu\u00e1 y\u1ebfu)<\/p><\/li><li><p>Qu\u00e1 t\u1ea3i b\u1ed9 thu (qu\u00e1 m\u1ea1nh)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh t\u1ed5n hao ch\u00e8n (Insertion Loss Calculation Method)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u01b0\u1edbc t\u00ednh kho\u1ea3ng c\u00e1ch SFP th\u1ef1c t\u1ebf, k\u1ef9 s\u01b0 t\u00ednh t\u1ed5ng t\u1ed5n hao quang tr\u00ean to\u00e0n b\u1ed9 li\u00ean k\u1ebft s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft bao g\u1ed3m:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><span>\u0110\u1ed9 suy hao s\u1ee3i quang (t\u1ed5n th\u1ea5t tr\u00ean km)<\/span><\/p><\/li><li><p><span>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i (m\u1ed7i k\u1ebft n\u1ed1i LC\/SC)<\/span><\/p><\/li><li><p><span>T\u1ed5n hao m\u1ed1i n\u1ed1i (n\u1ed1i h\u00e0n ho\u1eb7c n\u1ed1i c\u01a1 h\u1ecdc)<\/span><\/p><\/li><li><p><span>T\u1ed5n hao t\u1ea1i b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel)<\/span><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n h\u00f3a:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed5ng t\u1ed5n hao = T\u1ed5n hao s\u1ee3i quang + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + T\u1ed5n hao m\u1ed1i n\u1ed1i<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3 so s\u00e1nh v\u1edbi:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng = C\u00f4ng su\u1ea5t TX \u2212 \u0110\u1ed9 nh\u1ea1y RX<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc quy\u1ebft \u0111\u1ecbnh:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>N\u1ebfu T\u1ed5ng t\u1ed5n hao \u2264 Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng \u2192 li\u00ean k\u1ebft \u1ed5n \u0111\u1ecbnh<br\/>N\u1ebfu T\u1ed5ng t\u1ed5n hao &gt; Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t kh\u1ea3 d\u1ee5ng \u2192 li\u00ean k\u1ebft th\u1ea5t b\u1ea1i ho\u1eb7c tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ec1 xu\u1ea5t bi\u00ean an to\u00e0n (Th\u1ef1c h\u00e0nh k\u1ef9 thu\u1eadt t\u1ed1t nh\u1ea5t)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, k\u1ef9 s\u01b0 kh\u00f4ng bao gi\u1edd thi\u1ebft k\u1ebf li\u00ean k\u1ebft \u0111\u1ec3 v\u1eadn h\u00e0nh \u1edf m\u1ee9c 100% c\u00f4ng su\u1ea5t l\u00fd thuy\u1ebft. Lu\u00f4n lu\u00f4n ph\u1ea3i \u0111\u01b0a v\u00e0o m\u1ed9t bi\u00ean an to\u00e0n (c\u00f2n g\u1ecdi l\u00e0 kho\u1ea3ng d\u1ef1 ph\u00f2ng k\u1ef9 thu\u1eadt).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u00ean \u0111\u1ec1 xu\u1ea5t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Bi\u00ean an to\u00e0n t\u1ed1i thi\u1ec3u t\u1eeb 3\u20135 dB<\/strong><\/p><\/li><li><p>Bi\u00ean l\u1edbn h\u01a1n d\u00e0nh cho:<\/p><ul><li><p>M\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft vi\u1ec5n th\u00f4ng kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang \u0111\u00e3 c\u0169<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do bi\u00ean an to\u00e0n quan tr\u1ecdng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang gi\u00e0 \u0111i l\u00e0m t\u0103ng t\u1ed5n hao theo th\u1eddi gian<\/p><\/li><li><p>Dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng quang<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i b\u1ecb suy gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng do s\u1eed d\u1ee5ng l\u1eb7p l\u1ea1i<\/p><\/li><li><p>B\u1ee5i b\u1ea9n v\u00e0 nhi\u1ec5m b\u1ea9n g\u00e2y suy hao b\u1ea5t ng\u1edd<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: M\u1ed9t k\u1ebft n\u1ed1i ho\u1ea1t \u0111\u1ed9ng \u201ctr\u00ean gi\u1ea5y\u201d c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i trong th\u1ef1c t\u1ebf n\u1ebfu kh\u00f4ng c\u00f3 d\u1ef1 ph\u00f2ng an to\u00e0n ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00f4ng th\u1ee9c ra quy\u1ebft \u0111\u1ecbnh \u0111\u01a1n gi\u1ea3n cho l\u1eadp k\u1ebf ho\u1ea1ch tri\u1ec3n khai<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch kho\u1ea3ng c\u00e1ch SFP, k\u1ef9 s\u01b0 th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh ra quy\u1ebft \u0111\u1ecbnh th\u1ef1c ti\u1ec5n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Quy t\u1eafc t\u1eebng b\u01b0\u1edbc:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>X\u00e1c \u0111\u1ecbnh lo\u1ea1i SFP (SR \/ LR \/ ER)<\/p><\/li><li><p>Ki\u1ec3m tra c\u00f4ng su\u1ea5t ph\u00e1t (TX) v\u00e0 \u0111\u1ed9 nh\u1ea1y thu (RX)<\/p><\/li><li><p>T\u00ednh to\u00e1n t\u1ed5ng suy hao \u01b0\u1edbc l\u01b0\u1ee3ng<\/p><\/li><li><p>So s\u00e1nh v\u1edbi ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t<\/p><\/li><li><p>\u00c1p d\u1ee5ng d\u1ef1 ph\u00f2ng an to\u00e0n (3\u20135 dB)<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Logic ra quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>N\u1ebfu <strong>ng\u00e2n s\u00e1ch &gt; suy hao + d\u1ef1 ph\u00f2ng<\/strong> \u2192 \u2714 Tri\u1ec3n khai an to\u00e0n<\/p><\/li><li><p>N\u1ebfu <strong>ng\u00e2n s\u00e1ch \u2248 suy hao<\/strong> \u2192 \u26a0 Nguy c\u01a1 m\u1ea5t \u1ed5n \u0111\u1ecbnh<\/p><\/li><li><p>N\u1ebfu <strong>ng\u00e2n s\u00e1ch &lt; suy hao<\/strong> \u2192 \u274c K\u1ebft n\u1ed1i s\u1ebd th\u1ea5t b\u1ea1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t con s\u1ed1 c\u1ed1 \u0111\u1ecbnh\u2014m\u00e0 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a s\u1ef1 c\u00e2n b\u1eb1ng c\u00f4ng su\u1ea5t quang tr\u00ean to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch k\u1ebft n\u1ed1i, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>D\u1ef1 \u0111o\u00e1n ch\u00ednh x\u00e1c hi\u1ec7u n\u0103ng SFP trong th\u1ef1c t\u1ebf<\/p><\/li><li><p>Tr\u00e1nh c\u00e1c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i b\u1ea5t ng\u1edd<\/p><\/li><li><p>T\u1ed1i \u01b0u h\u00f3a quy\u1ebft \u0111\u1ecbnh chi ph\u00ed so v\u1edbi kho\u1ea3ng c\u00e1ch<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i c\u1ee7a m\u1ea1ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y khi\u1ebfn ph\u00e2n t\u00edch ng\u00e2n s\u00e1ch k\u1ebft n\u1ed1i tr\u1edf th\u00e0nh ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1ng tin c\u1eady nh\u1ea5t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf c\u1ee7a SFP trong m\u1ecdi tri\u1ec3n khai m\u1ea1ng c\u00e1p quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 C\u00e1c v\u1ea5n \u0111\u1ec1 kho\u1ea3ng c\u00e1ch SFP ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi c\u00e1c module SFP \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch v\u00e0 k\u1ebft n\u1ed1i v\u1ec1 m\u1eb7t v\u1eadt l\u00fd d\u01b0\u1eddng nh\u01b0 \u1ed5n \u0111\u1ecbnh, c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn kho\u1ea3ng c\u00e1ch SFP v\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh trong m\u1ea1ng c\u00e1p quang. Nh\u1eefng s\u1ef1 c\u1ed1 n\u00e0y th\u01b0\u1eddng kh\u00f4ng b\u1eaft ngu\u1ed3n t\u1eeb switch hay c\u1ed5ng m\u00e0 do s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch quang h\u1ecdc, \u0111i\u1ec1u ki\u1ec7n s\u1ee3i quang ho\u1eb7c l\u1ef1a ch\u1ecdn module sai.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u r\u00f5 c\u00e1c m\u1eabu l\u1ed7i n\u00e0y gi\u00fap k\u1ef9 s\u01b0 nhanh ch\u00f3ng ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u00f4i ph\u1ee5c k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/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\/f8a1224cde614ecab98641da5bebbb54.jpg\" alt=\"Common SFP Distance Problems and How to Fix Them\" class=\"wp-image-2636\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f8a1224cde614ecab98641da5bebbb54.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f8a1224cde614ecab98641da5bebbb54-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f8a1224cde614ecab98641da5bebbb54-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f8a1224cde614ecab98641da5bebbb54-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f8a1224cde614ecab98641da5bebbb54-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 K\u1ebft n\u1ed1i \u201cUp\u201d nh\u01b0ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 g\u00e2y nh\u1ea7m l\u1eabn nh\u1ea5t trong tri\u1ec3n khai th\u1ef1c t\u1ebf l\u00e0 khi k\u1ebft n\u1ed1i hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i \u201cup\u201d nh\u01b0ng l\u01b0u l\u01b0\u1ee3ng l\u1ea1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t g\u00f3i d\u1eef li\u1ec7u ng\u1eaft qu\u00e3ng<\/p><\/li><li><p>\u0110\u1ed9 tr\u1ec5 t\u0103ng \u0111\u1ed9t bi\u1ebfn<\/p><\/li><li><p>L\u1ed7i CRC ho\u1eb7c m\u1ea5t khung (frame drops)<\/p><\/li><li><p>Tr\u1ea1ng th\u00e1i giao di\u1ec7n dao \u0111\u1ed9ng (flapping)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch k\u1ebft n\u1ed1i \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n (qu\u00e1 g\u1ea7n gi\u1edbi h\u1ea1n kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a)<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i s\u1ee3i quang b\u1ea9n ho\u1eb7c b\u1ecb h\u01b0 h\u1ea1i m\u1ed9t ph\u1ea7n<\/p><\/li><li><p>C\u00e1p s\u1ee3i quang ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m ho\u1eb7c \u0111\u00e3 l\u00e3o h\u00f3a<\/p><\/li><li><p>Thi\u1ebfu d\u1ef1 ph\u00f2ng an to\u00e0n trong thi\u1ebft k\u1ebf<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u00e0m s\u1ea1ch t\u1ea5t c\u1ea3 \u0111\u1ea7u n\u1ed1i s\u1ee3i quang (LC\/SC)<\/p><\/li><li><p>T\u00ednh l\u1ea1i ng\u00e2n s\u00e1ch k\u1ebft n\u1ed1i v\u1edbi d\u1ef1 ph\u00f2ng 3\u20135 dB<\/p><\/li><li><p>Thay th\u1ebf c\u00e1c d\u00e2y c\u00e1p n\u1ed1i (patch cables) ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p<\/p><\/li><li><p>Gi\u1ea3m kho\u1ea3ng c\u00e1ch k\u1ebft n\u1ed1i ho\u1eb7c n\u00e2ng c\u1ea5p l\u00ean c\u00e1c b\u1ed9 quang h\u1ecdc ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: M\u1ed9t k\u1ebft n\u1ed1i SFP \u201cho\u1ea1t \u0111\u1ed9ng\u201d kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng l\u00e0 m\u1ed9t k\u1ebft n\u1ed1i SFP \u201c\u1ed5n \u0111\u1ecbnh\u201d.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Kh\u00f4ng c\u00f3 k\u1ebft n\u1ed1i do sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t v\u1ea5n \u0111\u1ec1 r\u1ea5t ph\u1ed5 bi\u1ebfn l\u00e0 s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch b\u01b0\u1edbc s\u00f3ng gi\u1eefa c\u00e1c b\u1ed9 thu ph\u00e1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u00e8n k\u1ebft n\u1ed1i kh\u00f4ng s\u00e1ng (tr\u1ea1ng th\u00e1i m\u1ea5t t\u00edn hi\u1ec7u quang \u2013 LOS)<\/p><\/li><li><p>C\u1ed5ng switch hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i \u201cdown\u201d<\/p><\/li><li><p>Kh\u00f4ng ph\u00e1t hi\u1ec7n t\u00edn hi\u1ec7u quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng sai l\u1ea7m \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t SR 850nm tr\u00ean c\u00e1p quang \u0111\u01a1n mode<\/p><\/li><li><p>K\u1ebft n\u1ed1i c\u00e1c b\u1ed9 thu ph\u00e1t kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi nhau (SR \u2194 LR)<\/p><\/li><li><p>Tr\u1ed9n l\u1eabn c\u00e1c module kh\u00f4ng t\u01b0\u01a1ng th\u00edch do nh\u00e0 s\u1ea3n xu\u1ea5t quy \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o c\u1ea3 hai \u0111\u1ea7u s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 thu ph\u00e1t gi\u1ed1ng h\u1ec7t nhau ho\u1eb7c t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Ph\u00f9 h\u1ee3p b\u01b0\u1edbc s\u00f3ng:<\/p><ul><li><p>850nm \u2192 c\u00e1p quang \u0111a mode<\/p><\/li><li><p>1310nm \u2192 c\u00e1p quang \u0111\u01a1n mode<\/p><\/li><\/ul><\/li><li><p>X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a b\u1ed9 thu ph\u00e1t v\u1edbi n\u1ec1n t\u1ea3ng switch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: Sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch nhanh nh\u1ea5t l\u00e0m h\u1ecfng ho\u00e0n to\u00e0n k\u1ebft n\u1ed1i SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 T\u00edn hi\u1ec7u nh\u1eadn qu\u00e1 m\u1ea1nh tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i khi c\u00f4ng su\u1ea5t quang qu\u00e1 cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i thi\u1ebft l\u1eadp th\u00e0nh c\u00f4ng nh\u01b0ng l\u1ed7i xu\u1ea5t hi\u1ec7n ngay l\u1eadp t\u1ee9c<\/p><\/li><li><p>Ng\u1eaft k\u1ebft n\u1ed1i ng\u1eaft qu\u00e3ng tr\u00ean c\u00e1c \u0111o\u1ea1n c\u00e1p quang ng\u1eafn<\/p><\/li><li><p>C\u1ea3nh b\u00e1o qu\u00e1 t\u1ea3i b\u1ed9 thu (tr\u00ean c\u00e1c thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nguy\u00ean nh\u00e2n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t t\u1ea7m xa (LR\/ER) tr\u00ean c\u00e1c k\u1ebft n\u1ed1i c\u00e1p quang r\u1ea5t ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Th\u00eam b\u1ed9 suy hao quang (1\u201310 dB t\u00f9y theo thi\u1ebft k\u1ebf)<\/p><\/li><li><p>Chuy\u1ec3n sang d\u00f9ng b\u1ed9 thu ph\u00e1t SR (t\u1ea7m ng\u1eafn)<\/p><\/li><li><p>T\u0103ng chi\u1ec1u d\u00e0i c\u00e1p n\u1ed1i n\u1ebfu kh\u1ea3 thi<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: C\u00f4ng su\u1ea5t quang qu\u00e1 cao c\u0169ng g\u00e2y h\u1ea1i nh\u01b0 c\u00f4ng su\u1ea5t qu\u00e1 th\u1ea5p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Sai l\u1ec7ch lo\u1ea1i c\u00e1p quang (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/smf-optical-transceiver-vs-mmf-optical-transceiver-guide\/\">SMF so v\u1edbi MMF<\/a> L\u1ed7i)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t l\u1ed7i tri\u1ec3n khai th\u01b0\u1eddng g\u1eb7p kh\u00e1c l\u00e0 s\u1eed d\u1ee5ng sai lo\u1ea1i c\u00e1p quang v\u1edbi module SFP kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng c\u00f3 k\u1ebft n\u1ed1i ho\u1eb7c t\u00edn hi\u1ec7u r\u1ea5t y\u1ebfu<\/p><\/li><li><p>T\u1ef7 l\u1ec7 l\u1ed7i c\u1ef1c k\u1ef3 cao<\/p><\/li><li><p>K\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng kh\u1edbp ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t SR tr\u00ean c\u00e1p quang \u0111\u01a1n mode (OS1\/OS2)<\/p><\/li><li><p>S\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t LR tr\u00ean c\u00e1p quang \u0111a mode (OM2\/OM3\/OM4)<\/p><\/li><li><p>Tr\u1ed9n l\u1eabn c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang kh\u00e1c lo\u1ea1i trong c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00f9 h\u1ee3p \u0111\u00fang lo\u1ea1i c\u00e1p quang:<\/p><ul><li><p>C\u00e1p quang \u0111a mode \u2192 SR (850nm)<\/p><\/li><li><p>C\u00e1p quang \u0111\u01a1n mode \u2192 LR\/ER (1310nm\/1550nm)<\/p><\/li><\/ul><\/li><li><p>Thay th\u1ebf c\u00e1c c\u00e1p n\u1ed1i kh\u00f4ng t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Ki\u1ec3m tra to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng truy\u1ec1n c\u00e1p quang, kh\u00f4ng ch\u1ec9 c\u00e1c \u0111i\u1ec3m \u0111\u1ea7u cu\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udccc Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: Sai l\u1ec7ch lo\u1ea1i c\u00e1p quang th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u00e0 \u201cc\u00e1c module SFP k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng\u201d.\u201d<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Danh s\u00e1ch ki\u1ec3m tra kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 d\u00e0nh cho k\u1ef9 s\u01b0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ch\u1ea9n \u0111o\u00e1n h\u1ec7 th\u1ed1ng c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 kho\u1ea3ng c\u00e1ch SFP m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng, h\u00e3y tu\u00e2n theo danh s\u00e1ch ki\u1ec3m tra c\u00f3 c\u1ea5u tr\u00fac sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Ki\u1ec3m tra l\u1edbp v\u1eadt l\u00fd<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch t\u1ea5t c\u1ea3 \u0111\u1ea7u n\u1ed1i c\u00e1p quang<\/p><\/li><li><p>X\u00e1c minh k\u1ebft n\u1ed1i LC\/SC ch\u00ednh x\u00e1c<\/p><\/li><li><p>Ki\u1ec3m tra c\u00e1c ch\u1ed7 cong ho\u1eb7c h\u01b0 h\u1ea1i c\u1ee7a c\u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch quang h\u1ecdc<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn s\u1ef1 kh\u1edbp v\u1ec1 b\u01b0\u1edbc s\u00f3ng (850 nm so v\u1edbi 1310 nm)<\/p><\/li><li><p>X\u00e1c minh lo\u1ea1i s\u1ee3i quang (SMF so v\u1edbi MMF)<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o ti\u00eau chu\u1ea9n SFP t\u01b0\u01a1ng th\u00edch (SR\/LR\/ER)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Ki\u1ec3m \u0111\u1ecbnh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh l\u1ea1i t\u1ed5ng t\u1ed5n hao quang<\/p><\/li><li><p>X\u00e1c nh\u1eadn c\u00f4ng su\u1ea5t ph\u00e1t (TX) so v\u1edbi \u0111\u1ed9 nh\u1ea1y thu (RX)<\/p><\/li><li><p>Th\u00eam bi\u00ean an to\u00e0n t\u1ed1i thi\u1ec3u 3\u20135 dB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Ki\u1ec3m tra thi\u1ebft b\u1ecb v\u00e0 c\u1ea5u h\u00ecnh<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch SFP c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>Ki\u1ec3m tra c\u00e1c h\u1ea1n ch\u1ebf nh\u00e0 cung c\u1ea5p ho\u1eb7c s\u1ef1 c\u1ed1 m\u00e3 h\u00f3a<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o th\u01b0\u01a1ng l\u01b0\u1ee3ng t\u1ed1c \u0111\u1ed9 \u0111\u00fang (1G \/ 2,5G \/ 10G)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714 Gi\u00e1m s\u00e1t hi\u1ec7u n\u0103ng<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u00e1m s\u00e1t b\u1ed9 \u0111\u1ebfm l\u1ed7i (l\u1ed7i CRC, l\u1ed7i FCS)<\/p><\/li><li><p>Ki\u1ec3m tra m\u1ee9c c\u00f4ng su\u1ea5t quang (n\u1ebfu \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3)<\/p><\/li><li><p>Quan s\u00e1t t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a li\u00ean k\u1ebft theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 kho\u1ea3ng c\u00e1ch SFP kh\u00f4ng do h\u1ecfng ph\u1ea7n c\u1ee9ng g\u00e2y ra, m\u00e0 do s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch quang h\u1ecdc, l\u1eadp k\u1ebf ho\u1ea1ch li\u00ean k\u1ebft k\u00e9m ho\u1eb7c suy gi\u1ea3m m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch ki\u1ec3m tra h\u1ec7 th\u1ed1ng t\u1eebng b\u01b0\u1edbc v\u1ec1 b\u01b0\u1edbc s\u00f3ng, lo\u1ea1i s\u1ee3i quang v\u00e0 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf thi\u1ebft b\u1ecb\u2014\u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng kho\u1ea3ng c\u00e1ch SFP \u1ed5n \u0111\u1ecbnh v\u00e0 d\u1ef1 b\u00e1o \u0111\u01b0\u1ee3c trong c\u00e1c m\u1ea1ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p \u2014 Gi\u1ea3i th\u00edch kho\u1ea3ng c\u00e1ch SFP v\u00e0 ph\u1ea1m vi s\u1ee3i quang<\/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\/1381742a96204befa56800277c78d92c.jpg\" alt=\"FAQ \u2014 SFP Distance and Fiber Range Explained\" class=\"wp-image-2637\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1381742a96204befa56800277c78d92c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1381742a96204befa56800277c78d92c-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1381742a96204befa56800277c78d92c-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1381742a96204befa56800277c78d92c-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1381742a96204befa56800277c78d92c-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 s\u1ee3i quang SFP l\u00e0 bao nhi\u00eau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cKho\u1ea3ng c\u00e1ch s\u1ee3i quang SFP\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb c\u1ed1 \u0111\u1ecbnh v\u00ec n\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i b\u1ed9 thu ph\u00e1t quang v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i chung:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>SFP t\u1ea7m ng\u1eafn (SR, 850 nm tr\u00ean s\u1ee3i quang \u0111a mode): l\u00ean \u0111\u1ebfn ~300\u2013550 m\u00e9t<\/p><\/li><li><p>SFP t\u1ea7m xa (LR, 1310 nm tr\u00ean s\u1ee3i quang \u0111\u01a1n mode): l\u00ean \u0111\u1ebfn ~10 km<\/p><\/li><li><p>SFP t\u1ea7m xa m\u1edf r\u1ed9ng (ER\/ZR, h\u1ec7 th\u1ed1ng 1550 nm): 40 km \u0111\u1ebfn h\u01a1n 80 km t\u00f9y theo thi\u1ebft k\u1ebf<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0m r\u00f5 quan tr\u1ecdng: Ch\u00ednh s\u1ee3i quang kh\u00f4ng x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch\u2014m\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa lo\u1ea1i s\u1ee3i quang v\u00e0 quang h\u1ecdc SFP m\u1edbi x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 2: Ph\u1ea1m vi s\u1ee3i quang SFP l\u00e0 bao nhi\u00eau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea1m vi s\u1ee3i quang SFP \u0111\u1ec1 c\u1eadp \u0111\u1ebfn kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh t\u1ed1i \u0111a \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi m\u1ed9t h\u1ec7 th\u1ed1ng quang c\u1ee5 th\u1ec3, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1edbi h\u1ea1n chung \u00e1p d\u1ee5ng cho m\u1ecdi s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ec7 th\u1ed1ng \u0111a mode: t\u1ea7m ng\u1eafn, t\u1ed1i \u01b0u cho k\u1ebft n\u1ed1i n\u1ed9i b\u1ed9 t\u00f2a nh\u00e0<\/p><\/li><li><p>H\u1ec7 th\u1ed1ng \u0111\u01a1n mode: t\u1ea7m trung \u0111\u1ebfn t\u1ea7m xa, ph\u00f9 h\u1ee3p cho m\u1ea1ng khu\u00f4n vi\u00ean v\u00e0 m\u1ea1ng \u0111\u00f4 th\u1ecb<\/p><\/li><li><p>H\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eabn xa: \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho x\u01b0\u01a1ng s\u1ed1ng vi\u1ec5n th\u00f4ng v\u00e0 li\u00ean k\u1ebft li\u00ean th\u00e0nh ph\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin quan tr\u1ecdng: C\u00f9ng m\u1ed9t c\u00e1p s\u1ee3i quang c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c kho\u1ea3ng c\u00e1ch kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o m\u00f4-\u0111un SFP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u1ea3 hai \u0111\u1ea7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 3: M\u00f4-\u0111un SFP c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c ghi tr\u00ean nh\u00e3n kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, m\u00f4-\u0111un SFP c\u00f3 th\u1ec3 d\u01b0\u1eddng nh\u01b0 ho\u1ea1t \u0111\u1ed9ng v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c ghi tr\u00ean nh\u00e3n, nh\u01b0ng \u0111i\u1ec1u n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho tri\u1ec3n khai \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 x\u1ea3y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp t\u1ea1m th\u1eddi<\/p><\/li><li><p>S\u1ed1 l\u1ed7i bit t\u0103ng l\u00ean ho\u1eb7c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh b\u1ecb suy gi\u1ea3m c\u00f3 th\u1ec3 x\u1ea3y ra<\/p><\/li><li><p>Hi\u1ec7u n\u0103ng c\u00f3 th\u1ec3 suy gi\u1ea3m d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c t\u1ea3i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin quan tr\u1ecdng: C\u00e1c m\u1ee9c kho\u1ea3ng c\u00e1ch ghi tr\u00ean nh\u00e3n SFP l\u00e0 gi\u1edbi h\u1ea1n k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i ng\u01b0\u1ee1ng v\u1eadt l\u00fd tuy\u1ec7t \u0111\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi m\u1ea1ng s\u1ea3n xu\u1ea5t, vi\u1ec7c v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c ghi tr\u00ean nh\u00e3n s\u1ebd l\u00e0m gia t\u0103ng \u0111\u00e1ng k\u1ec3 r\u1ee7i ro v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c tr\u00e1nh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e2u h\u1ecfi 4: T\u1ea1i sao li\u00ean k\u1ebft SFP c\u1ee7a t\u00f4i th\u1ea5t b\u1ea1i \u1edf kho\u1ea3ng c\u00e1ch xa?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ed1 SFP \u1edf kho\u1ea3ng c\u00e1ch xa th\u01b0\u1eddng x\u1ea3y ra khi t\u00edn hi\u1ec7u quang tr\u1edf n\u00ean qu\u00e1 y\u1ebfu ho\u1eb7c suy hao \u0111\u1ebfn m\u1ee9c kh\u00f4ng th\u1ec3 duy tr\u00ec giao ti\u1ebfp \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n c\u01a1 b\u1ea3n ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 suy hao s\u1ee3i quang qu\u00e1 cao do kho\u1ea3ng c\u00e1ch<\/p><\/li><li><p>D\u1ef1 tr\u1eef c\u00f4ng su\u1ea5t quang kh\u00f4ng \u0111\u1ee7<\/p><\/li><li><p>T\u1ed5n th\u1ea5t t\u1ea1i c\u00e1c \u0111\u1ea7u n\u1ed1i ho\u1eb7c m\u1ed1i h\u00e0n ch\u01b0a \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn<\/p><\/li><li><p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng l\u00e0m suy gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u01b0u \u00fd quan tr\u1ecdng: M\u1ed9t li\u00ean k\u1ebft v\u1eabn c\u00f3 th\u1ec3 \u201ck\u1ebft n\u1ed1i\u201d \u1edf kho\u1ea3ng c\u00e1ch xa nh\u01b0ng l\u1ea1i th\u1ea5t b\u1ea1i \u1edf c\u1ea5p \u0111\u1ed9 to\u00e0n v\u1eb9n d\u1eef li\u1ec7u do ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u kh\u00f4ng \u0111\u1ee7.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe2 C\u00e1ch ch\u1ecdn m\u00f4-\u0111un SFP ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u00f4-\u0111un SFP ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch kh\u00f4ng ch\u1ec9 l\u00e0 quy\u1ebft \u0111\u1ecbnh mua h\u00e0ng \u2014 m\u00e0 c\u00f2n l\u00e0 quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf m\u1ea1ng, \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, hi\u1ec7u n\u0103ng v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec d\u00e0i h\u1ea1n. M\u1ed9t quy tr\u00ecnh l\u1ef1a ch\u1ecdn c\u00f3 c\u1ea5u tr\u00fac gi\u00fap tr\u00e1nh h\u1ea7u h\u1ebft c\u00e1c s\u1ef1 c\u1ed1 s\u1ee3i quang trong th\u1ef1c t\u1ebf ngay t\u1eeb giai \u0111o\u1ea1n tri\u1ec3n khai.<\/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\/dd77b0b681414f0296499f515be96249.jpg\" alt=\"How to Choose the Right SFP Module Based on Distance\" class=\"wp-image-2638\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dd77b0b681414f0296499f515be96249.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dd77b0b681414f0296499f515be96249-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dd77b0b681414f0296499f515be96249-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dd77b0b681414f0296499f515be96249-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dd77b0b681414f0296499f515be96249-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Khung l\u1ef1a ch\u1ecdn t\u1eebng b\u01b0\u1edbc<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" >Kho\u1ea3ng c\u00e1ch y\u00eau c\u1ea7u<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c x\u00e1c \u0111\u1ecbnh r\u00f5 kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a c\u1ee7a li\u00ean k\u1ebft trong thi\u1ebft k\u1ebf m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u1ea1m vi ng\u1eafn (\u2264 550 m): th\u01b0\u1eddng d\u00f9ng trong trung t\u00e2m d\u1eef li\u1ec7u ho\u1eb7c k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li><li><p>Ph\u1ea1m vi trung b\u00ecnh (1\u201310 km): m\u1ea1ng n\u1ed9i b\u1ed9 khu\u00f4n vi\u00ean ho\u1eb7c m\u1ea1ng truy nh\u1eadp \u0111\u00f4 th\u1ecb<\/p><\/li><li><p>Ph\u1ea1m vi xa (tr\u00ean 10 km): li\u00ean k\u1ebft l\u00f5i ho\u1eb7c li\u00ean k\u1ebft gi\u1eefa c\u00e1c th\u00e0nh ph\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean t\u1eafc quan tr\u1ecdng: Lu\u00f4n thi\u1ebft k\u1ebf v\u1edbi kho\u1ea3ng c\u00e1ch l\u1edbn h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi y\u00eau c\u1ea7u th\u1ef1c t\u1ebf \u0111\u1ec3 duy tr\u00ec bi\u00ean an to\u00e0n.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >Lo\u1ea1i s\u1ee3i quang s\u1eb5n c\u00f3<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang s\u1ee3i \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p quang \u0111a mode (OM1\/OM2\/OM3\/OM4) \u2192 c\u00e1c module SR t\u1ea7m ng\u1eafn<\/p><\/li><li><p>C\u00e1p quang \u0111\u01a1n mode (OS1\/OS2) \u2192 c\u00e1c module LR\/ER t\u1ea7m xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: M\u00f4-\u0111un SFP ph\u1ea3i t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1p quang hi\u1ec7n c\u00f3\u2014kh\u00f4ng ph\u1ea3i ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >L\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng (850nm so v\u1edbi 1310nm)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng tr\u1ef1c ti\u1ebfp quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi t\u00edn hi\u1ec7u v\u00e0 kho\u1ea3ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>850nm (SR, d\u1ef1a tr\u00ean VCSEL):<\/p><ul><li><p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho m\u00f4i tr\u01b0\u1eddng kho\u1ea3ng c\u00e1ch ng\u1eafn v\u00e0 m\u1eadt \u0111\u1ed9 cao<\/p><\/li><li><p>Ho\u1ea1t \u0111\u1ed9ng v\u1edbi s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9<\/p><\/li><\/ul><\/li><li><p>1310 nm (LR):<\/p><ul><li><p>Ph\u00f9 h\u1ee3p nh\u1ea5t cho truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch trung b\u00ecnh \u0111\u1ebfn xa<\/p><\/li><li><p>Ho\u1ea1t \u0111\u1ed9ng v\u1edbi s\u1ee3i quang \u0111\u01a1n ch\u1ebf \u0111\u1ed9<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean t\u1eafc then ch\u1ed1t: Sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft khi tri\u1ec3n khai.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >Ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ec1u ch\u1ea5p nh\u1eadn m\u1ecdi <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">B\u1ed9 thu ph\u00e1t SFP<\/a> nh\u01b0 nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi tri\u1ec3n khai:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh danh s\u00e1ch t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li><li><p>Ki\u1ec3m tra c\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a OEM<\/p><\/li><li><p>X\u00e1c minh t\u1ed1c \u0111\u1ed9 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 (1G \/ 2,5G \/ 10G)<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a firmware<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: Ngay c\u1ea3 c\u00e1c module quang h\u1ecdc kh\u1edbp ho\u00e0n h\u1ea3o c\u0169ng s\u1ebd th\u1ea5t b\u1ea1i n\u1ebfu b\u1ed9 chuy\u1ec3n m\u1ea1ch t\u1eeb ch\u1ed1i module \u0111\u00f3.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >Chi\u1ebfn l\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed \u2013 hi\u1ec7u su\u1ea5t<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn module SFP c\u0169ng l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa ng\u00e2n s\u00e1ch v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c module SR: chi ph\u00ed th\u1ea5p h\u01a1n, ph\u1ea1m vi gi\u1edbi h\u1ea1n<\/p><\/li><li><p>C\u00e1c module LR: chi ph\u00ed cao h\u01a1n, nh\u01b0ng linh ho\u1ea1t h\u01a1n<\/p><\/li><li><p>C\u00e1c thi\u1ebft b\u1ecb quang h\u1ecdc b\u00ean th\u1ee9 ba t\u01b0\u01a1ng th\u00edch: gi\u1ea3i ph\u00e1p thay th\u1ebf ti\u1ebft ki\u1ec7m chi ph\u00ed n\u1ebfu \u0111\u01b0\u1ee3c ki\u1ec3m \u0111\u1ecbnh \u0111\u00fang c\u00e1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t: T\u1ed1i \u01b0u h\u00f3a theo t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi, ch\u1ee9 kh\u00f4ng ch\u1ec9 theo gi\u00e1 \u0111\u01a1n v\u1ecb.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >Danh s\u00e1ch ki\u1ec3m tra gi\u1ea3m r\u1ee7i ro tr\u01b0\u1edbc khi tri\u1ec3n khai<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t cu\u1ed1i c\u00f9ng, h\u00e3y x\u00e1c th\u1ef1c c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u2714 Kho\u1ea3ng c\u00e1ch n\u1eb1m trong ng\u00e2n s\u00e1ch quang h\u1ecdc (c\u00f3 d\u1ef1 ph\u00f2ng an to\u00e0n)<\/p><\/li><li><p>\u2714 Lo\u1ea1i c\u00e1p quang ph\u00f9 h\u1ee3p <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/blog\/technical-documentation\/sfp-optical-module-specifications.htm\">\u0111\u1eb7c t\u1ea3 SFP<\/a><\/p><\/li><li><p>\u2714 \u0110\u00e3 x\u00e1c nh\u1eadn t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1ec1 b\u01b0\u1edbc s\u00f3ng<\/p><\/li><li><p>\u2714 \u0110\u1ea7u n\u1ed1i s\u1ea1ch v\u00e0 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch<\/p><\/li><li><p>\u2714 \u0110\u00e3 x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>\u2714 \u0110\u00e3 ho\u00e0n t\u1ea5t ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/p><\/li><li><p>\u2714 Ki\u1ec3m tra \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft d\u01b0\u1edbi t\u1ea3i l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: Ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 SFP c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba \u0111\u01b0\u1ee3c nh\u1edd vi\u1ec7c x\u00e1c th\u1ef1c k\u1ef9 l\u01b0\u1ee1ng tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eadn \u0111\u1ecbnh cu\u1ed1i c\u00f9ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn module SFP ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch l\u00e0 m\u1ed9t quy tr\u00ecnh k\u1ef9 thu\u1eadt c\u00f3 c\u1ea5u tr\u00fac, k\u1ebft h\u1ee3p c\u00e1c y\u1ebfu t\u1ed1 quang h\u1ecdc, lo\u1ea1i c\u00e1p quang v\u00e0 k\u1ef7 lu\u1eadt thi\u1ebft k\u1ebf m\u1ea1ng. Khi th\u1ef1c hi\u1ec7n \u0111\u00fang, quy tr\u00ecnh n\u00e0y gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 n\u1ed7 l\u1ef1c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 v\u00e0 \u0111\u1ed9i ng\u0169 mua s\u1eafm \u0111ang t\u00ecm ki\u1ebfm c\u00e1c gi\u1ea3i ph\u00e1p quang h\u1ecdc \u0111\u00e1ng tin c\u1eady v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c l\u1ef1a ch\u1ecdn \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra chuy\u00ean nghi\u1ec7p t\u1ea1i <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a>, n\u01a1i t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 vi\u1ec7c ki\u1ec3m \u0111\u1ecbnh hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u kho\u1ea3ng c\u00e1ch SFP, ph\u1ea1m vi quang h\u1ecdc v\u00e0 gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf c\u1ee7a module SR\/LR. H\u1ecdc c\u00e1ch \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u01b0\u1edbc s\u00f3ng, lo\u1ea1i quang v\u00e0 quang h\u1ecdc \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/p>","protected":false},"author":1,"featured_media":2639,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-2640","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2640","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=2640"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2640\/revisions"}],"predecessor-version":[{"id":10723,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2640\/revisions\/10723"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2639"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}