{"id":5540,"date":"2025-08-05T00:00:00","date_gmt":"2025-08-05T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/crosstalk-definition-causes-types-effects\/"},"modified":"2026-05-25T09:03:53","modified_gmt":"2026-05-25T09:03:53","slug":"crosstalk-definition-causes-types-effects","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/crosstalk-definition-causes-types-effects","title":{"rendered":"Crosstalk trong Ethernet l\u00e0 g\u00ec? Nguy\u00ean nh\u00e2n, \u1ea3nh h\u01b0\u1edfng v\u00e0 c\u00e1ch gi\u1ea3m thi\u1ec3u"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk)<\/strong> l\u00e0 nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n x\u1ea3y ra khi c\u00e1c tr\u01b0\u1eddng \u0111i\u1ec7n ho\u1eb7c t\u1eeb t\u1eeb m\u1ed9t k\u00eanh t\u00edn hi\u1ec7u g\u00e2y gi\u00e1n \u0111o\u1ea1n c\u00e1c k\u00eanh li\u1ec1n k\u1ec1\u2014d\u1eabn \u0111\u1ebfn l\u1ed7i d\u1eef li\u1ec7u, gi\u1ea3m t\u1ed1c \u0111\u1ed9 v\u00e0 th\u1eadm ch\u00ed th\u1ea5t b\u1ea1i trong vi\u1ec7c \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 trong c\u00e1c tri\u1ec3n khai m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. C\u1ee5 th\u1ec3 trong ph\u1ea7n c\u1ee9ng m\u1ea1ng, nhi\u1ec5u xuy\u00ean \u00e2m ph\u00e1t sinh do gh\u00e9p \u0111i\u1ec7n t\u1eeb gi\u1eefa c\u00e1c d\u00e2y c\u00e1p \u0111\u1eb7t g\u1ea7n nhau, c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch in (PCB) ho\u1eb7c c\u00e1c \u0111\u1ea7u n\u1ed1i, v\u00e0 \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng trong trung t\u00e2m d\u1eef li\u1ec7u, b\u1ed9 chuy\u1ec3n m\u1ea1ch, m\u00e1y ch\u1ee7 c\u0169ng nh\u01b0 to\u00e0n b\u1ed9 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00f3 m\u1eadt \u0111\u1ed9 cao. <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce.jpg\" alt=\"Infographic of network crosstalk between Ethernet wires, with advanced shielding and MagJack connectors\" class=\"wp-image-5536\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c33459c10db341d7b2fe6ce173e964ce-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a4 Nhi\u1ec5u xuy\u00ean \u00e2m l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nhi\u1ec5u xuy\u00ean k\u00eanh (crosstalk)<\/strong> trong h\u1ec7 th\u1ed1ng Ethernet \u0111\u1ec1 c\u1eadp \u0111\u1ebfn nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-electromagnetic-interference\/\">nhi\u1ec5u \u0111i\u1ec7n t\u1eeb <\/a>gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u li\u1ec1n k\u1ec1. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra khi m\u1ed9t t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n tr\u00ean m\u1ed9t c\u1eb7p d\u00e2y g\u00e2y ra t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n l\u00ean m\u1ed9t c\u1eb7p d\u00e2y kh\u00e1c \u1edf g\u1ea7n \u0111\u00f3, c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m suy gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 then ch\u1ed1t trong c\u00e1c m\u1ea1ng Ethernet t\u1ed1c \u0111\u1ed9 cao, \u0111\u1eb7c bi\u1ec7t khi s\u1eed d\u1ee5ng c\u00e1p \u0111\u00f4i xo\u1eafn kh\u00f4ng che ch\u1eafn (UTP) ho\u1eb7c c\u00e1c b\u1ea3ng m\u1ea1ch in (PCB) \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed d\u00e0y \u0111\u1eb7c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a4 \u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec5u xuy\u00ean \u00e2m \u0111\u1ed1i v\u1edbi hi\u1ec7u n\u0103ng Ethernet<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec5u xuy\u00ean \u00e2m \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng, nh\u1ea5t l\u00e0 \u1edf t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u cao (Gigabit tr\u1edf l\u00ean). C\u00e1c v\u1ea5n \u0111\u1ec1 ch\u00ednh do nhi\u1ec5u xuy\u00ean \u00e2m qu\u00e1 m\u1ee9c g\u00e2y ra bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e9o v\u00e0 suy hao t\u00edn hi\u1ec7u<\/p><\/li><li><p>T\u1ef7 l\u1ec7 l\u1ed7i bit (BER) t\u0103ng<\/p><\/li><li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh m\u1ea1ng ho\u1eb7c ng\u1eaft k\u1ebft n\u1ed1i<\/p><\/li><li><p>Kh\u00f4ng \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh (v\u00ed d\u1ee5: IEEE 802.3, TIA-568)<\/p><\/li><li><p>C\u1ea7n truy\u1ec1n l\u1ea1i t\u00edn hi\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed1c \u0111\u1ed9 truy\u1ec1n c\u00e0ng cao (v\u00ed d\u1ee5: Gigabit, 10GBASE-T), h\u1ec7 th\u1ed1ng c\u00e0ng nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u xuy\u00ean \u00e2m. \u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua doanh nghi\u1ec7p v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb g\u1ed1c (OEM\/ODM), ki\u1ec3m so\u00e1t nhi\u1ec5u xuy\u00ean \u00e2m kh\u00f4ng ch\u1ec9 l\u00e0 th\u1ef1c h\u00e0nh k\u1ef9 thu\u1eadt t\u1ed1t nh\u1ea5t\u2014m\u00e0 c\u00f2n l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 v\u01b0\u1ee3t qua c\u00e1c b\u00e0i ki\u1ec3m tra tu\u00e2n th\u1ee7, gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 b\u1ea3o v\u1ec7 kho\u1ea3n \u0111\u1ea7u t\u01b0 v\u00e0o n\u00e2ng c\u1ea5p m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a4 C\u00e1c lo\u1ea1i nhi\u1ec5u xuy\u00ean \u00e2m ch\u00ednh<\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Nhi\u1ec5u xuy\u00ean \u00e2m \u0111\u1ea7u g\u1ea7n (NEXT):<\/strong> \u0110o l\u01b0\u1eddng nhi\u1ec5u t\u1ea1i \u0111\u1ea7u truy\u1ec1n (\u0111\u1ea7u g\u1eedi) c\u1ee7a c\u00e1p ho\u1eb7c \u0111\u1ea7u n\u1ed1i. \u0110\u00e2y l\u00e0 th\u00f4ng s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng then ch\u1ed1t cho c\u00e1p v\u00e0 th\u00e0nh ph\u1ea7n Ethernet.<\/p><\/li><li><p><strong>Nhi\u1ec5u xuy\u00ean \u00e2m \u0111\u1ea7u xa (FEXT):<\/strong> \u0110o l\u01b0\u1eddng nhi\u1ec5u t\u1ea1i \u0111\u1ea7u xa (\u0111\u1ea7u nh\u1eadn). \u00cdt nghi\u00eam tr\u1ecdng h\u01a1n NEXT \u1edf t\u1ed1c \u0111\u1ed9 th\u1ea5p nh\u01b0ng tr\u1edf th\u00e0nh m\u1ed1i lo ng\u1ea1i \u1edf d\u1ea3i b\u0103ng th\u00f4ng cao h\u01a1n.<\/p><\/li><li><p><strong>Nhi\u1ec5u xuy\u00ean \u00e2m ngo\u00e0i (AXT):<\/strong> Nhi\u1ec5u gi\u1eefa c\u00e1c c\u00e1p li\u1ec1n k\u1ec1, ch\u1ee9 kh\u00f4ng ch\u1ec9 gi\u1eefa c\u00e1c c\u1eb7p d\u00e2y trong c\u00f9ng m\u1ed9t c\u00e1p; \u0111\u1eb7c bi\u1ec7t g\u00e2y v\u1ea5n \u0111\u1ec1 trong c\u00e1c t\u1ee7 rack v\u00e0 b\u1ea3ng \u0111\u1ea5u n\u1ed1i \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed ch\u1eadt ch\u1ed9i.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a4 C\u00e1ch gi\u1ea3m nhi\u1ec5u xuy\u00ean \u00e2m trong thi\u1ebft k\u1ebf Ethernet<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2705 1. <strong>Thi\u1ebft k\u1ebf d\u00e2y xo\u1eafn \u0111\u00f4i<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c xo\u1eafn c\u00e1c c\u1eb7p d\u00e2y gi\u00fap gi\u1ea3m di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p, t\u1eeb \u0111\u00f3 h\u1ea1n ch\u1ebf gh\u00e9p \u0111i\u1ec7n t\u1eeb. C\u00e1c c\u00e1p thu\u1ed9c lo\u1ea1i cao h\u01a1n (Cat6, Cat6a) c\u00f3 \u0111\u1ed9 xo\u1eafn ch\u1eb7t v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u h\u01a1n.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2705 2. <strong>Ch\u1eafn nhi\u1ec5u<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00e1p xo\u1eafn \u0111\u00f4i c\u00f3 l\u1edbp che ch\u1eafn (STP)<\/strong> cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n so v\u1edbi c\u00e1p UTP.<\/p><\/li><li><p><strong>L\u1edbp che ch\u1eafn b\u00ean trong<\/strong> tr\u00ean \u0111\u1ea7u n\u1ed1i RJ45 (nh\u01b0 s\u1ea3n ph\u1ea9m c\u1ee7a LINK-PP) c\u00e1ch ly hi\u1ec7u qu\u1ea3 t\u1eebng c\u1eb7p d\u00e2y.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2705 3. <strong>Kho\u1ea3ng c\u00e1ch v\u00e0 \u0111i d\u00e2y<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Duy tr\u00ec kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao tr\u00ean b\u1ea3ng m\u1ea1ch in (PCB).<\/p><\/li><li><p>Tr\u00e1nh ch\u1ea1y c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch song song trong kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2705 4. <strong>T\u00edn hi\u1ec7u vi ph\u00e2n<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Ethernet s\u1eed d\u1ee5ng t\u00edn hi\u1ec7u vi ph\u00e2n \u0111\u1ec3 tri\u1ec7t ti\u00eau nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung, bao g\u1ed3m c\u1ea3 nhi\u1ec5u xuy\u00ean \u00e2m.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2705 5. <strong>S\u1eed d\u1ee5ng bi\u1ebfn \u00e1p t\u00edch h\u1ee3p (MagJack)<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP\u2019s<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>m\u00f4-\u0111un bi\u1ebfn \u00e1p Ethernet<\/strong><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi b\u1ed9 l\u1ecdc v\u00e0 c\u00e1ch ly bi\u1ebfn \u00e1p t\u00edch h\u1ee3p, gi\u00fap gi\u1ea3m c\u1ea3 nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung l\u1eabn nhi\u1ec5u xuy\u00ean \u00e2m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1ea3i ph\u00e1p c\u1ee7a LINK-PP \u0111\u1ed1i v\u1edbi nhi\u1ec5u xuy\u00ean \u00e2m trong Ethernet<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP\u2019s<br> <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">B\u1ed9 k\u1ebft n\u1ed1i RJ45 MagJack<\/a> and <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">B\u1ed9 bi\u1ebfn \u00e1p LAN<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1edbp che ch\u1eafn b\u00ean trong n\u00e2ng cao v\u00e0 t\u1ef7 l\u1ec7 xo\u1eafn t\u1ed1i \u01b0u<\/p><\/li><li><p>Cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p c\u00f3 t\u1ea7n s\u1ed1 cao, r\u00f2 r\u1ec9 th\u1ea5p<\/p><\/li><li><p>Thi\u1ebft k\u1ebf v\u01b0\u1ee3t m\u1ee9c y\u00eau c\u1ea7u c\u1ee7a IEEE v\u00e0 TIA v\u1ec1 NEXT, FEXT v\u00e0 nhi\u1ec5u xuy\u00ean \u00e2m ngo\u00e0i. Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y mang l\u1ea1i l\u1ee3i \u00edch c\u1ee5 th\u1ec3: \u0111\u1ed9 tin c\u1eady cao h\u01a1n, t\u1ef7 l\u1ec7 tri\u1ec3n khai th\u00e0nh c\u00f4ng nhanh h\u01a1n v\u00e0 gi\u1ea3m th\u1eddi gian x\u1eed l\u00fd s\u1ef1 c\u1ed1.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udccc<br> <strong>1. <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/443544.htm\"><strong>LP6096ANL<\/strong><\/a><strong> \u2013 Bi\u1ebfn \u00e1p LAN PoE+ 1G (SMT)<\/strong><\/h4>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df.jpg\" alt=\"PoE+ LAN Transformer \" class=\"wp-image-5537\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/136c9fc550de40409105ce83ad3470df-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ebfn \u00e1p Ethernet Gigabit \u0111\u01a1n c\u1ed5ng n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho <strong>\u1ee9ng d\u1ee5ng 1000BASE-T v\u00e0 PoE+<\/strong> N\u00f3 s\u1eed d\u1ee5ng thi\u1ebft k\u1ebf t\u1eeb t\u00ednh c\u00e1ch ly cao v\u00e0 cu\u1ed9n d\u00e2y t\u1ed1i \u01b0u nh\u1eb1m gi\u1ea3m thi\u1ec3u nhi\u1ec5u xuy\u00ean \u00e2m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hi\u1ec7u n\u0103ng nhi\u1ec5u xuy\u00ean \u00e2m (dB t\u1ed1i thi\u1ec3u):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>@30 MHz<\/strong>: \u201343 dB<\/p><\/li><li><p><strong>@60 MHz<\/strong>: \u201337 dB<\/p><\/li><li><p><strong>@100 MHz<\/strong>: \u201333 dB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udee0 Ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch PoE, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng nh\u00fang.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h4 class=\"wp-block-heading\" > \ud83d\udccc<br> <strong>2. <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473541.htm\"><strong>LPJG0804HENL<\/strong><\/a><strong> \u2013 \u0110\u1ea7u n\u1ed1i RJ45 1G t\u00edch h\u1ee3p bi\u1ebfn \u00e1p (MagJack)<\/strong><\/h4>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c.jpg\" alt=\"RJ45 Connector with Integrated Magnetics\" class=\"wp-image-5538\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/af4c8cac0ed34d08bf38d0e93ef0492c-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">MagJack RJ45 nh\u1ecf g\u1ecdn n\u00e0y c\u00f3 <strong>d\u1ea1ng 1\u00d71 Tab Down<\/strong> t\u00edch h\u1ee3p s\u1eb5n bi\u1ebfn \u00e1p v\u00e0 \u0111\u00e8n LED b\u00e1o tr\u1ea1ng th\u00e1i, \u0111\u1ea3m b\u1ea3o truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hi\u1ec7u n\u0103ng nhi\u1ec5u xuy\u00ean \u00e2m (dB t\u1ed1i thi\u1ec3u):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>@30 MHz<\/strong>: \u201340 dB<\/p><\/li><li><p><strong>@60 MHz<\/strong>: \u201336 dB<\/p><\/li><li><p><strong>@100 MHz<\/strong>: \u201330 dB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udd27 L\u00fd t\u01b0\u1edfng cho b\u1ed9 chuy\u1ec3n m\u1ea1ch Ethernet, bo m\u1ea1ch ch\u1ee7, \u0111i\u1ec7n tho\u1ea1i IP v\u00e0 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng y\u00eau c\u1ea7u \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" > \u27a4 K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c m\u1ea1ng Ethernet ng\u00e0y c\u00e0ng t\u0103ng t\u1ed1c \u0111\u1ed9 v\u00e0 m\u1eadt \u0111\u1ed9, <strong>nhi\u1ec5u xuy\u00ean \u00e2m tr\u1edf th\u00e0nh m\u1ed1i lo ng\u1ea1i ng\u00e0y c\u00e0ng gia t\u0103ng<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft c\u1ea3 \u1edf c\u1ea5p \u0111\u1ed9 c\u00e1p l\u1eabn \u0111\u1ea7u n\u1ed1i. B\u1eb1ng c\u00e1ch l\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf k\u1ef9 l\u01b0\u1ee1ng nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>MagJack c\u1ee7a LINK-PP,<\/strong><\/a><strong> <\/strong>c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u n\u0103ng cao ngay c\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u crosstalk trong Ethernet l\u00e0 g\u00ec, c\u00e1ch n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 c\u00e1ch thi\u1ebft k\u1ebf c\u1ee7a LINK-PP gi\u00fap gi\u1ea3m nhi\u1ec5u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":1,"featured_media":5539,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22,23],"class_list":["post-5540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5540","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=5540"}],"version-history":[{"count":2,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5540\/revisions"}],"predecessor-version":[{"id":7536,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5540\/revisions\/7536"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5539"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}