{"id":6076,"date":"2025-05-26T00:00:00","date_gmt":"2025-05-26T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/difference-between-rj11-and-rj45\/"},"modified":"2026-06-22T09:32:32","modified_gmt":"2026-06-22T09:32:32","slug":"difference-between-rj11-and-rj45","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/difference-between-rj11-and-rj45","title":{"rendered":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ea7u n\u1ed1i RJ11 v\u00e0 RJ45 l\u00e0 g\u00ec?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Trong l\u0129nh v\u1ef1c vi\u1ec5n th\u00f4ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh, c\u00e1c \u0111\u1ea7u n\u1ed1i \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o giao ti\u1ebfp li\u1ec1n m\u1ea1ch. Hai lo\u1ea1i \u0111\u1ea7u n\u1ed1i ph\u1ed5 bi\u1ebfn l\u00e0 RJ11 v\u00e0 RJ45, m\u1ed7i lo\u1ea1i ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t. M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u thu\u1ed9c ti\u00eau chu\u1ea9n \u201cRegistered Jack\u201d (RJ), nh\u01b0ng \u1ee9ng d\u1ee5ng, hi\u1ec7u n\u0103ng v\u00e0 thi\u1ebft k\u1ebf v\u1eadt l\u00fd c\u1ee7a ch\u00fang kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3. RJ11, v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c t\u00e1c v\u1ee5 vi\u1ec5n th\u00f4ng nh\u01b0 k\u1ebft n\u1ed1i \u0111i\u1ec7n tho\u1ea1i c\u1ed1 \u0111\u1ecbnh. Ng\u01b0\u1ee3c l\u1ea1i, RJ45 l\u00e0 th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu trong m\u1ea1ng m\u00e1y t\u00ednh, d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 m\u00e1y t\u00ednh v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RJ11 v\u00e0 RJ45 c\u0169ng th\u1ec3 hi\u1ec7n r\u00f5 qua h\u00ecnh d\u00e1ng b\u00ean ngo\u00e0i v\u00e0 c\u1ea5u h\u00ecnh ch\u00e2n c\u1eafm. Vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RJ11 v\u00e0 RJ45 gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >RJ11 v\u00e0 RJ45 l\u00e0 g\u00ec?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >RJ11: \u0110\u1ea7u n\u1ed1i \u0111i\u1ec7n tho\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">RJ11, vi\u1ebft t\u1eaft c\u1ee7a Registered Jack 11, l\u00e0 m\u1ed9t giao di\u1ec7n vi\u1ec5n th\u00f4ng ti\u00eau chu\u1ea9n, ch\u1ee7 y\u1ebfu d\u00f9ng cho t\u00edn hi\u1ec7u \u00e2m thanh t\u01b0\u01a1ng t\u1ef1. N\u00f3 th\u01b0\u1eddng c\u00f3 c\u1ea5u h\u00ecnh 6 v\u1ecb tr\u00ed, 2 d\u00e2y d\u1eabn (6P2C) ho\u1eb7c 6 v\u1ecb tr\u00ed, 4 d\u00e2y d\u1eabn (6P4C), m\u1eb7c d\u00f9 th\u00f4ng th\u01b0\u1eddng ch\u1ec9 s\u1eed d\u1ee5ng hai d\u00e2y. C\u00e1c \u0111\u1ea7u n\u1ed1i RJ11 ch\u1ee7 y\u1ebfu xu\u1ea5t hi\u1ec7n trong c\u00e1c thi\u1ebft b\u1ecb sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110i\u1ec7n tho\u1ea1i c\u1ed1 \u0111\u1ecbnh<\/p><\/li><li><p>M\u00e1y fax<\/p><\/li><li><p>K\u1ebft n\u1ed1i modem DSL<\/p><\/li><li><p>Thi\u1ebft b\u1ecb vi\u1ec5n th\u00f4ng<\/p><\/li><li><p>Giao ti\u1ebfp \u00e2m thanh t\u01b0\u01a1ng t\u1ef1<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >RJ45: \u0110\u1ea7u n\u1ed1i m\u1ea1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45, hay Registered Jack 45, l\u00e0 \u0111\u1ea7u n\u1ed1i 8 v\u1ecb tr\u00ed, 8 d\u00e2y d\u1eabn (8P8C), \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ng Ethernet. Kh\u00e1c v\u1edbi RJ11, RJ45 c\u00f3 t\u00e1m ch\u00e2n, cho ph\u00e9p h\u1ed7 tr\u1ee3 t\u1ed1i \u0111a b\u1ed1n c\u1eb7p d\u00e2y. C\u1ea5u h\u00ecnh n\u00e0y cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao \u2014 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho c\u00e1c t\u00e1c v\u1ee5 internet v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh. N\u00f3 h\u1ed7 tr\u1ee3 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea1ng c\u1ee5c b\u1ed9 (LAN)<\/p><\/li><li><p>b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>M\u00e1y t\u00ednh v\u00e0 m\u00e1y ch\u1ee7<\/p><\/li><li><p>Thi\u1ebft b\u1ecb IoT <\/p><\/li><li><p>VoIP<\/p><\/li><li><p>T\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p<\/p><\/li>\n<\/ul>\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\/575f171228f7459fbeec7b4d66caa3d8.jpg\" alt=\"What Is the Difference Between RJ11 and RJ45?\" class=\"wp-image-6073\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/575f171228f7459fbeec7b4d66caa3d8.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/575f171228f7459fbeec7b4d66caa3d8-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/575f171228f7459fbeec7b4d66caa3d8-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/575f171228f7459fbeec7b4d66caa3d8-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/575f171228f7459fbeec7b4d66caa3d8-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa RJ11 v\u00e0 RJ45<\/h2>\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>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>RJ11<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>RJ45<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>K\u00edch th\u01b0\u1edbc<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nh\u1ecf h\u01a1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u1edbn h\u01a1n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ch\u00e2n\/D\u00e2y d\u1eabn<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 ho\u1eb7c 6<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>C\u1ea5u h\u00ecnh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>6P2C ho\u1eb7c 6P4C<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8P8C<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng ch\u00ednh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec7n tho\u1ea1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng l\u01b0\u1edbi<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Truy\u1ec1n d\u1eef li\u1ec7u<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 24 Mbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 10 Gbps (v\u1edbi c\u00e1p Cat6)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Lo\u1ea1i c\u00e1p<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p \u0111i\u1ec7n tho\u1ea1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p Ethernet (Cat5e, Cat6, v.v.)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u01b0\u01a1ng th\u00edch<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec7n tho\u1ea1i c\u1ed1 \u0111\u1ecbnh, m\u00e1y fax<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e1y t\u00ednh, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ti\u00eau chu\u1ea9n<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a cho d\u1eef li\u1ec7u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>TIA\/EIA-568-B<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1eb7t v\u1eadt l\u00fd v\u00e0 k\u1ef9 thu\u1eadt<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u n\u1ed1i RJ11 nh\u1ecf g\u1ecdn, c\u00f3 chi\u1ec1u r\u1ed9ng kho\u1ea3ng <strong>9,65 mm<\/strong> v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho k\u1ebft n\u1ed1i \u0111i\u1ec7n tho\u1ea1i m\u1ed9t \u0111\u01b0\u1eddng d\u00e2y. Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u1ea7u n\u1ed1i RJ45 r\u1ed9ng h\u01a1n, kho\u1ea3ng <strong>11,65 mm<\/strong>, nh\u1eb1m ch\u1ee9a nhi\u1ec1u d\u00e2y h\u01a1n cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u1ea5u h\u00ecnh ch\u00e2n c\u1eafm<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u n\u1ed1i RJ11 th\u01b0\u1eddng s\u1eed d\u1ee5ng 2 ho\u1eb7c 4 ch\u00e2n, \u0111\u1ee7 cho giao ti\u1ebfp tho\u1ea1i. \u0110\u1ea7u n\u1ed1i RJ45 s\u1eed d\u1ee5ng c\u1ea3 8 ch\u00e2n, cho ph\u00e9p x\u1eed l\u00fd b\u0103ng th\u00f4ng cao h\u01a1n c\u1ea7n thi\u1ebft cho m\u1ea1ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong khi \u0111\u1ea7u n\u1ed1i RJ11 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u ph\u00f9 h\u1ee3p cho tho\u1ea1i v\u00e0 internet t\u1ed1c \u0111\u1ed9 th\u1ea5p (t\u1ed1i \u0111a 24 Mbps), \u0111\u1ea7u n\u1ed1i RJ45 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, h\u1ed7 tr\u1ee3 t\u1ed1i \u0111a 10 Gbps v\u1edbi c\u00e1p th\u00edch h\u1ee3p.<\/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\/b4f2a56e01794518af6aa738ea964386.webp\" alt=\"RJ Connector Configuration and Pinouts\" class=\"wp-image-6074\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b4f2a56e01794518af6aa738ea964386.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b4f2a56e01794518af6aa738ea964386-300x169.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b4f2a56e01794518af6aa738ea964386-1024x576.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b4f2a56e01794518af6aa738ea964386-768x432.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b4f2a56e01794518af6aa738ea964386-18x10.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >V\u00ec sao RJ11 kh\u00f4ng ph\u00f9 h\u1ee3p cho m\u1ea1ng m\u00e1y t\u00ednh<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u n\u1ed1i RJ11 kh\u00f4ng ph\u00f9 h\u1ee3p cho m\u1ea1ng m\u00e1y t\u00ednh do c\u1ea5u h\u00ecnh ch\u00e2n h\u1ea1n ch\u1ebf \u2014 ch\u1ec9 c\u00f3 hai ho\u1eb7c b\u1ed1n ch\u00e2n ho\u1ea1t \u0111\u1ed9ng \u2014 khi\u1ebfn ch\u00fang kh\u00f4ng th\u1ec3 h\u1ed7 tr\u1ee3 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao. \u0110i\u1ec1u n\u00e0y gi\u1edbi h\u1ea1n vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang trong m\u1ea1ng Ethernet, v\u1ed1n y\u00eau c\u1ea7u nhi\u1ec1u c\u1eb7p d\u00e2y \u0111\u1ec3 \u0111\u1ea1t b\u0103ng th\u00f4ng v\u00e0 t\u1ed1c \u0111\u1ed9 c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng RJ11 trong h\u1ec7 th\u1ed1ng m\u1ea1ng c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u n\u0103ng, v\u00ec ch\u00fang kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u hi\u1ec7n \u0111\u1ea1i nh\u01b0 ph\u00e1t tr\u1ef1c tuy\u1ebfn ho\u1eb7c c\u1ea5p ngu\u1ed3n qua Ethernet (PoE). RJ11 l\u00fd t\u01b0\u1edfng cho vi\u1ec5n th\u00f4ng, nh\u01b0ng \u0111\u1ed1i v\u1edbi m\u1ecdi \u1ee9ng d\u1ee5ng d\u1ef1a tr\u00ean Ethernet, \u0111\u1ea7u n\u1ed1i RJ45 m\u1edbi l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady v\u00e0 t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >V\u00ec sao RJ45 kh\u00f4ng ph\u00f9 h\u1ee3p cho vi\u1ec5n th\u00f4ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17539-modular-jack.htm\">B\u1ed9 n\u1ed1i RJ45<\/a> \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho m\u1ea1ng d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, ch\u1ee9 kh\u00f4ng ph\u1ea3i cho giao ti\u1ebfp tho\u1ea1i. C\u00e1c h\u1ec7 th\u1ed1ng vi\u1ec5n th\u00f4ng y\u00eau c\u1ea7u x\u1eed l\u00fd t\u00edn hi\u1ec7u b\u0103ng th\u00f4ng th\u1ea5p, v\u00e0 thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p c\u1ee7a RJ45 l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 th\u01b0\u1eddng g\u00e2y v\u1ea5n \u0111\u1ec1 trong b\u1ed1i c\u1ea3nh n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng l\u00e0 suy hao t\u00edn hi\u1ec7u. \u0110\u1ea7u n\u1ed1i RJ45 c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk) \u2014 hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec5u gi\u1eefa c\u00e1c d\u00e2y \u2014 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 r\u00f5 r\u00e0ng c\u1ee7a gi\u1ecdng n\u00f3i. Ngo\u00e0i ra, kh\u1ea3 n\u0103ng b\u1ecb nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) c\u1ee7a ch\u00fang c\u00f2n l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh trong c\u00e1c h\u1ec7 th\u1ed1ng vi\u1ec5n th\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi c\u1ea5u h\u00ecnh t\u00e1m ch\u00e2n v\u00e0 thi\u1ebft k\u1ebf t\u1eadp trung v\u00e0o d\u1eef li\u1ec7u, RJ45 b\u1ecb \u201cqu\u00e1 t\u1ea3i\u201d \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng tho\u1ea1i. C\u00e1c \u0111\u1ea7u n\u1ed1i \u0111\u01a1n gi\u1ea3n h\u01a1n nh\u01b0 RJ11 ph\u00f9 h\u1ee3p h\u01a1n, mang l\u1ea1i m\u1ee9c nhi\u1ec5u th\u1ea5p h\u01a1n v\u00e0 truy\u1ec1n gi\u1ecdng n\u00f3i \u1ed5n \u0111\u1ecbnh h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ph\u00e2n t\u00edch c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u1ee7a \u0111\u1ea7u n\u1ed1i RJ45 trong vi\u1ec5n th\u00f4ng:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u0110i\u1ec3m y\u1ebfu<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Gi\u1ea3i th\u00edch<br><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>G\u00e2y ra b\u1edfi c\u1ea3m \u1ee9ng h\u1ed7 c\u1ea3m gi\u1eefa c\u00e1c v\u00f2ng d\u00f2ng \u0111i\u1ec7n c\u1ee7a \u0111\u1ea7u n\u1ed1i v\u00e0 d\u00e2y c\u00e1p, d\u1eabn \u0111\u1ebfn suy hao t\u00edn hi\u1ec7u.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nhi\u1ec5m \u0111i\u1ec7n t\u1eeb<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch g\u1ea7n gi\u1eefa c\u00e1c \u0111\u1ea7u n\u1ed1i l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng b\u1ecb nhi\u1ec5u, \u0111\u1eb7c bi\u1ec7t \u1edf t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Suy hao t\u00edn hi\u1ec7u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c v\u00f2ng d\u00f2ng \u0111i\u1ec7n ch\u1ed3ng l\u1ea5n trong c\u00e1c jack RJ45 ti\u00eau chu\u1ea9n d\u1eabn \u0111\u1ebfn t\u0103ng nhi\u1ec5u xuy\u00ean k\u00eanh tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c \u0111\u01b0\u1eddng d\u00e2y.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1c \u0111\u1ea7u n\u1ed1i RJ kh\u00e1c li\u00ean quan<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e3 t\u1eebng nghe \u0111\u1ebfn c\u00e1c \u0111\u1ea7u n\u1ed1i RJ (Registered Jack) kh\u00e1c ngo\u00e0i RJ11 v\u00e0 RJ45. C\u00e1c \u0111\u1ea7u n\u1ed1i n\u00e0y ph\u1ee5c v\u1ee5 nh\u1eefng m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3 trong vi\u1ec5n th\u00f4ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh. M\u1ed7i lo\u1ea1i c\u00f3 c\u1ea5u h\u00ecnh v\u00e0 \u1ee9ng d\u1ee5ng ri\u00eang, n\u00ean ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c nhi\u1ec7m v\u1ee5 kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u0111\u1ea7u n\u1ed1i RJ ph\u1ed5 bi\u1ebfn m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>RJ12<\/strong>: T\u01b0\u01a1ng t\u1ef1 RJ11 nh\u01b0ng c\u00f3 s\u00e1u ch\u00e2n ho\u1ea1t \u0111\u1ed9ng thay v\u00ec hai ho\u1eb7c b\u1ed1n ch\u00e2n. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n tho\u1ea1i \u0111a \u0111\u01b0\u1eddng d\u00e2y.<\/p><\/li><li><p><strong>RJ14<\/strong>: \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n tho\u1ea1i hai \u0111\u01b0\u1eddng d\u00e2y. N\u00f3 s\u1eed d\u1ee5ng b\u1ed1n ch\u00e2n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 x\u1eed l\u00fd hai \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i ri\u00eang bi\u1ec7t.<\/p><\/li><li><p><strong>RJ25<\/strong>: M\u1ed9t phi\u00ean b\u1ea3n n\u00e2ng cao h\u01a1n v\u1edbi s\u00e1u ch\u00e2n ho\u1ea1t \u0111\u1ed9ng, h\u1ed7 tr\u1ee3 ba \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i.<\/p><\/li><li><p><strong>RJ48<\/strong>: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u0111\u01b0\u1eddng d\u00e2y T1 v\u00e0 ISDN (M\u1ea1ng s\u1ed1 d\u1ecbch v\u1ee5 t\u00edch h\u1ee3p). N\u00f3 h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n v\u00e0 ph\u1ed5 bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ea7u n\u1ed1i RJ11 v\u00e0 RJ45 gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn \u0111\u00fang lo\u1ea1i \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a m\u00ecnh. RJ11, v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n v\u00e0 c\u1ea5u h\u00ecnh 6P2C ho\u1eb7c 6P4C, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t cho c\u00e1c t\u00e1c v\u1ee5 vi\u1ec5n th\u00f4ng nh\u01b0 k\u1ebft n\u1ed1i \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i \u0111\u01a1n ho\u1eb7c h\u1ec7 th\u1ed1ng ADSL. Ng\u01b0\u1ee3c l\u1ea1i, RJ45 c\u00f3 c\u1ea5u h\u00ecnh 8P8C v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u d\u1eef li\u1ec7u nh\u01b0 m\u1ea1ng Ethernet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh nhanh \u0111\u1ec3 h\u1ed7 tr\u1ee3 b\u1ea1n ra quy\u1ebft \u0111\u1ecbnh:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>RJ11<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>RJ45<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u1ea5u h\u00ecnh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>6P2C ho\u1eb7c 6P4C<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8P8C<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Usage<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i \u0111\u01a1n, h\u1ec7 th\u1ed1ng ADSL<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u1ee8ng d\u1ee5ng \u0111\u00f2i h\u1ecfi nhi\u1ec1u d\u1eef li\u1ec7u, m\u1ea1ng Ethernet<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u1ea3 n\u0103ng b\u0103ng th\u00f4ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u0103ng th\u00f4ng h\u1ea1n ch\u1ebf<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean \u0111\u1ebfn 10 Gbps<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1eb7c \u0111i\u1ec3m v\u1eadt l\u00fd<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, \u00edt ti\u1ebfp \u0111i\u1ec3m h\u01a1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n, nhi\u1ec1u ti\u1ebfp \u0111i\u1ec3m h\u01a1n<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi vi\u1ec5n th\u00f4ng, RJ11 mang l\u1ea1i t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u1ed9 tin c\u1eady cao. \u0110\u1ed1i v\u1edbi m\u1ea1ng m\u00e1y t\u00ednh, RJ45 \u0111\u1ea3m b\u1ea3o truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng Ethernet. Lu\u00f4n ch\u1ecdn \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a \u1ee9ng d\u1ee5ng \u0111\u1ec3 tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u su\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >T\u1ea1i sao n\u00ean ch\u1ecdn \u0111\u1ea7u n\u1ed1i RJ45 LINK-PP?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi n\u00f3i \u0111\u1ebfn c\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u su\u1ea5t cao, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">LINK-PP<\/a> n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t nh\u00e0 cung c\u1ea5p h\u00e0ng \u0111\u1ea7u. C\u00e1c \u0111\u1ea7u n\u1ed1i RJ45 c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, mang l\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf (ISO 9001:2008, UL, RoHS)<\/p><\/li><li><p>V\u1eadt li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u n\u0103ng<\/p><\/li><li><p>T\u01b0\u01a1ng th\u00edch v\u1edbi nhi\u1ec1u lo\u1ea1i c\u00e1p Ethernet (Cat5e, Cat6, v.v.)<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao l\u00ean \u0111\u1ebfn 10 Gbps<\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ea7u n\u1ed1i RJ11 v\u00e0 RJ45, bao g\u1ed3m k\u00edch th\u01b0\u1edbc, c\u1ea5u h\u00ecnh ch\u00e2n c\u1eafm v\u00e0 \u1ee9ng d\u1ee5ng trong vi\u1ec5n th\u00f4ng v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh.<\/p>","protected":false},"author":1,"featured_media":6075,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,25],"class_list":["post-6076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-modular-jack"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6076","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=6076"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6076\/revisions"}],"predecessor-version":[{"id":11486,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6076\/revisions\/11486"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/6075"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=6076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=6076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=6076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}