{"id":5572,"date":"2025-08-02T00:00:00","date_gmt":"2025-08-02T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/diagnosing-repairing-rj45-magjack-issues-connection-problems\/"},"modified":"2026-06-22T09:14:55","modified_gmt":"2026-06-22T09:14:55","slug":"diagnosing-repairing-rj45-magjack-issues-connection-problems","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/diagnosing-repairing-rj45-magjack-issues-connection-problems","title":{"rendered":"Ch\u1ea9n \u0111o\u00e1n v\u00e0 s\u1eeda ch\u1eefa s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i Magjack RJ45"},"content":{"rendered":"<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\/c1bdb0ddc99e43ca941976cae407f5d8.webp\" alt=\"Diagnosing and Repairing RJ45 Magjack Connection Issues\" class=\"wp-image-5570\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c1bdb0ddc99e43ca941976cae407f5d8.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c1bdb0ddc99e43ca941976cae407f5d8-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c1bdb0ddc99e43ca941976cae407f5d8-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c1bdb0ddc99e43ca941976cae407f5d8-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c1bdb0ddc99e43ca941976cae407f5d8-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">M\u1ea1ng c\u1ee7a b\u1ea1n c\u00f3 b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i kh\u00f4ng? \u0110ang g\u1eb7p ph\u1ea3i t\u1ed1c \u0111\u1ed9 ch\u1eadm ho\u1eb7c c\u00e1c c\u1ed5ng b\u1ecb ch\u1ebft? B\u1ed9 ph\u1eadn khi\u00eam t\u1ed1n <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><span class=\"qc-p1-tag\" style=\"color: var(--qc-color8);\"><strong>c\u1ed5ng RJ45 Magjack<\/strong><\/span><\/a><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> (M\u00f4-\u0111un c\u1ea3m \u1ee9ng + c\u1ed5ng) th\u01b0\u1eddng l\u00e0 ng\u01b0\u1eddi h\u00f9ng th\u1ea7m l\u1eb7ng \u2013 ho\u1eb7c th\u1ee7 ph\u1ea1m \u2013 trong k\u1ebft n\u1ed1i Ethernet c\u1ee7a b\u1ea1n. H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n n\u00e0y \u0111i s\u00e2u v\u00e0o <\/span><span class=\"qc-p1-tag\"><strong>10 s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ed1i v\u1edbi Magjack RJ45<\/strong><\/span><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">, nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a ch\u00fang v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p kh\u1ea3 thi. T\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1, tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3 v\u00e0 l\u1ef1a ch\u1ecdn c\u00e1c linh ki\u1ec7n \u0111\u00e1ng tin c\u1eady nh\u01b0 <\/span><span class=\"qc-p1-tag\"><strong>\u0111\u1ea7u n\u1ed1i Magjack LINK-PP<\/strong><\/span><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t m\u1ea1ng m\u1ea1nh m\u1ebd v\u00e0 kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n. D\u00f9 b\u1ea1n l\u00e0 k\u1ef9 s\u01b0 m\u1ea1ng, nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng hay chuy\u00ean gia CNTT, h\u00e3y l\u00e0m ch\u1ee7 ngh\u1ec7 thu\u1eadt b\u1ea3o tr\u00ec v\u00e0 x\u1eed l\u00fd s\u1ef1 c\u1ed1 Magjack!<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Gi\u1edbi thi\u1ec7u: Vai tr\u00f2 then ch\u1ed1t c\u1ee7a Magjack RJ45<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>b\u1ed9 k\u1ebft n\u1ed1i RJ45 Magjack<\/strong> t\u00edch h\u1ee3p b\u1ed9 bi\u1ebfn \u00e1p t\u00edn hi\u1ec7u (c\u1ea3m \u1ee9ng), cu\u1ed9n ch\u1ed1ng nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung v\u00e0 \u0111\u1ea7u n\u1ed1i v\u1eadt l\u00fd th\u00e0nh m\u1ed9t m\u00f4-\u0111un duy nh\u1ea5t. Ch\u00fang cung c\u1ea5p c\u00e1ch ly \u0111i\u1ec7n, kh\u1eed nhi\u1ec5u, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 \u1ed5n \u0111\u1ecbnh giao di\u1ec7n v\u1eadt l\u00fd. S\u1ef1 c\u1ed1 c\u00f3 th\u1ec3 l\u00e0m t\u00ea li\u1ec7t c\u00e1c c\u1ed5ng m\u1ea1ng, g\u00e2y ra th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng t\u1ed1n k\u00e9m. Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn \u0111\u1ea7u n\u1ed1i RJ45<\/strong>, <strong>s\u1ef1 c\u1ed1 c\u1ed5ng Ethernet<\/strong>, and <strong>x\u1eed l\u00fd s\u1ef1 c\u1ed1 Magjack<\/strong> l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u1ec1n v\u1eefng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>C\u00e1c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn \u0111\u1ed1i v\u1edbi Magjack RJ45 v\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udd25 <strong>1. H\u01b0 h\u1ecfng v\u1eadt l\u00fd &amp; m\u00e0i m\u00f2n (Th\u1ee7 ph\u1ea1m r\u00f5 r\u00e0ng)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> Ch\u00e2n b\u1ecb cong\/v\u1ee1, v\u1ecf b\u1ecb n\u1ee9t, c\u1ed5ng l\u1ecfng l\u1ebbo, k\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> C\u1eafm\/r\u00fat qu\u00e1 m\u1ea1nh, c\u00e1p ch\u1ecbu l\u1ef1c k\u00e9o qu\u00e1 m\u1ee9c, va \u0111\u1eadp c\u01a1 h\u1ecdc, c\u1ed5ng ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>c\u1ed5ng RJ45 b\u1ecb h\u01b0 h\u1ecfng<\/em>, <em>c\u1ed5ng Ethernet b\u1ecb v\u1ee1<\/em>, <em>s\u1eeda ch\u1eefa \u0111\u1ea7u n\u1ed1i RJ45<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u26a1 <strong>2. \u1ea2nh h\u01b0\u1edfng \u0111i\u1ec7n qu\u00e1 m\u1ee9c (EOS) &amp; x\u1ea3 t\u0129nh \u0111i\u1ec7n (ESD)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> S\u1ef1 c\u1ed1 ho\u00e0n to\u00e0n \u1edf c\u1ed5ng, h\u00e0nh vi b\u1ea5t th\u01b0\u1eddng, k\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> Xung \u0111i\u1ec7n, ti\u1ebfp \u0111\u1ea5t kh\u00f4ng \u0111\u00fang c\u00e1ch, thao t\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/esd-protection-link-pp-smart-factory-transceivers-rj45-cage\/\"><strong>ESD<\/strong><\/a> kh\u00f4ng c\u1ea9n th\u1eadn trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>h\u01b0 h\u1ecfng c\u1ed5ng Ethernet do ESD<\/em>, <em>b\u1ea3o v\u1ec7 c\u1ed5ng RJ45 ch\u1ed1ng s\u00e9t<\/em>, <em>s\u1ef1 c\u1ed1 EOS \u1edf Magjack<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83c\udf21\ufe0f <strong>3. \u1ee8ng su\u1ea5t nhi\u1ec7t &amp; qu\u00e1 nhi\u1ec7t (\u0110\u1eb7c bi\u1ec7t trong h\u1ec7 th\u1ed1ng PoE)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> C\u1ed5ng ng\u1eaft k\u1ebft n\u1ed1i khi t\u1ea3i cao, nh\u1ef1a \u0111\u1ed5i m\u00e0u, m\u00f9i kh\u00e9t, tu\u1ed5i th\u1ecd gi\u1ea3m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> T\u1ea3n nhi\u1ec7t kh\u00f4ng \u0111\u1ee7, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao, v\u01b0\u1ee3t gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t PoE, l\u01b0u th\u00f4ng kh\u00ed k\u00e9m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>Magjack PoE qu\u00e1 nhi\u1ec7t<\/em>, <em>qu\u1ea3n l\u00fd nhi\u1ec7t RJ45<\/em>, <em>c\u1ed5ng Ethernet n\u00f3ng<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udce1 <strong>4. Suy gi\u1ea3m t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u &amp; c\u00e1c v\u1ea5n \u0111\u1ec1 EMI\/RFI<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> M\u1ea5t g\u00f3i cao, t\u1ed1c \u0111\u1ed9 gi\u1ea3m, \u0111\u1ed9 tr\u1ec5 t\u0103ng, l\u1ed7i th\u01b0\u01a1ng l\u01b0\u1ee3ng li\u00ean k\u1ebft.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> Linh ki\u1ec7n c\u1ea3m \u1ee9ng b\u1ecb x\u00e2m h\u1ea1i, b\u1ed1 tr\u00ed b\u1ea3ng m\u1ea1ch in (PCB) k\u00e9m, thi\u1ebfu l\u1edbp ch\u1eafn \u0111i\u1ec7n t\u1eeb, v\u00f2ng n\u1ed1i \u0111\u1ea5t, ngu\u1ed3n nhi\u1ec5u b\u00ean ngo\u00e0i.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>Nhi\u1ec5u t\u00edn hi\u1ec7u Ethernet<\/em>, <em>V\u1ea5n \u0111\u1ec1 EMI c\u1ee7a c\u1ed5ng RJ45<\/em>, <em>\u0110\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u c\u1ee7a Magjack<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83e\uddea <strong>5. \u0102n m\u00f2n &amp; Nhi\u1ec5m b\u1ea9n<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn, \u0111i\u1ec7n tr\u1edf cao, c\u1eb7n m\u00e0u xanh\/l\u1ee5c ho\u1eb7c tr\u1eafng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c tr\u00ean c\u00e1c ch\u00e2n ti\u1ebfp x\u00fac.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> Ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m, m\u00f4i tr\u01b0\u1eddng ch\u1ee9a l\u01b0u hu\u1ef3nh (H\u2082S), h\u01a1i mu\u1ed1i, b\u1ee5i x\u00e2m nh\u1eadp, d\u01b0 l\u01b0\u1ee3ng keo h\u00e0n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>\u0102n m\u00f2n c\u1ed5ng RJ45<\/em>, <em>Nhi\u1ec5m b\u1ea9n c\u1ed5ng Ethernet<\/em>, <em>H\u1ecfng do y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng \u1edf Magjack<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udd0c <strong>6. C\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn PoE (Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (PD) kh\u00f4ng kh\u1edfi \u0111\u1ed9ng, c\u1ea5p \u0111i\u1ec7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh, c\u1ed5ng t\u1ef1 ng\u1eaft.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> Qu\u00e1 d\u00f2ng, \u0111o\u1ea3n m\u1ea1ch, kh\u00f4ng t\u01b0\u01a1ng th\u00edch <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-you-need-to-know-about-power-over-ethernet\/\"><strong>c\u00f4ng ngh\u1ec7 Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong><\/a> ti\u00eau chu\u1ea9n (802.3af\/at\/bt), ph\u00e1t hi\u1ec7n ch\u1eef k\u00fd sai.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>H\u1ecfng c\u1ed5ng PoE<\/em>, <em>S\u1ef1 c\u1ed1 PoE \u1edf Magjack RJ45<\/em>, <em>V\u1ea5n \u0111\u1ec1 truy\u1ec1n t\u1ea3i \u0111i\u1ec7n qua Ethernet<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83e\udde9 <strong>7. B\u00e3o h\u00f2a ho\u1eb7c h\u1ecfng cu\u1ed9n c\u1ea3m<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> T\u00edn hi\u1ec7u m\u00e9o, kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c li\u00ean k\u1ebft \u1edf m\u1ed9t s\u1ed1 t\u1ed1c \u0111\u1ed9\/kho\u1ea3ng c\u00e1ch nh\u1ea5t \u0111\u1ecbnh.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> M\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng m\u1ed9t chi\u1ec1u (DC) tr\u00ean cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p, d\u00f2ng qu\u00e1 l\u1edbn, l\u1ed7i s\u1ea3n xu\u1ea5t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>H\u1ecfng bi\u1ebfn \u00e1p Ethernet<\/em>, <em>S\u1ef1 c\u1ed1 cu\u1ed9n c\u1ea3m \u1edf Magjack<\/em>, <em>M\u00e9o t\u00edn hi\u1ec7u RJ45<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udee0\ufe0f <strong>8. M\u1ecfi m\u1ed1i h\u00e0n &amp; V\u1ea5n \u0111\u1ec1 g\u1eafn k\u1ebft tr\u00ean PCB<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> K\u1ebft n\u1ed1i ch\u1eadp ch\u1eddn, c\u1ed5ng ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng khi \u1ea5n l\u1ef1c t\u00e1c \u0111\u1ed9ng, v\u1ebft n\u1ee9t r\u00f5 r\u00e0ng tr\u00ean m\u1ed1i h\u00e0n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> \u1ee8ng su\u1ea5t c\u01a1 h\u1ecdc\/dao \u0111\u1ed9ng, chu k\u1ef3 nhi\u1ec7t, quy tr\u00ecnh h\u00e0n k\u00e9m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>H\u1ecfng m\u1ed1i h\u00e0n RJ45<\/em>, <em>K\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo \u1edf c\u1ed5ng Ethernet<\/em>, <em>V\u1ea5n \u0111\u1ec1 g\u1eafn RJ45 tr\u00ean PCB<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2696\ufe0f <strong>9. Kh\u00f4ng t\u01b0\u01a1ng th\u00edch &amp; Sai l\u1ec7ch ti\u00eau chu\u1ea9n<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> Li\u00ean k\u1ebft ch\u1ec9 \u0111\u1ea1t \u1edf t\u1ed1c \u0111\u1ed9 th\u1ea5p (v\u00ed d\u1ee5: 10 Mbps thay v\u00ec 1 Gbps), th\u1ea5t b\u1ea1i trong t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> S\u1eed d\u1ee5ng c\u00e1p kh\u00f4ng tu\u00e2n th\u1ee7 (v\u00ed d\u1ee5: CCA), c\u1eb7p d\u00e2y kh\u00f4ng kh\u1edbp, Magjack kh\u00f4ng \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho t\u1ed1c \u0111\u1ed9\/kho\u1ea3ng c\u00e1ch m\u1ee5c ti\u00eau.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>V\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch RJ45<\/em>, <em>S\u1ef1 c\u1ed1 Ethernet Gigabit<\/em>, <em>H\u1ecfng \u0111\u1ea7u n\u1ed1i Cat6<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83c\udfed <strong>10. L\u1ed7i s\u1ea3n xu\u1ea5t &amp; Linh ki\u1ec7n gi\u1ea3<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Bi\u1ec3u hi\u1ec7n:<\/strong> H\u1ecfng s\u1edbm, hi\u1ec7u n\u0103ng d\u01b0\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, h\u00e0nh vi kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Nguy\u00ean nh\u00e2n:<\/strong> V\u1eadt li\u1ec7u k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng, ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng y\u1ebfu, linh ki\u1ec7n gi\u1ea3 thi\u1ebfu cu\u1ed9n c\u1ea3m\/ch\u1eafn c\u00e1ch \u0111\u00fang ti\u00eau chu\u1ea9n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>\u0110\u1ea7u n\u1ed1i RJ45 gi\u1ea3<\/em>, <em>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng Magjack<\/em>, <em>\u0110\u1ed9 tin c\u1eady linh ki\u1ec7n Ethernet<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 Magjack RJ45: H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng:<\/strong> Ki\u1ec3m tra c\u00e1c d\u1ea5u hi\u1ec7u h\u01b0 h\u1ecfng v\u1eadt l\u00fd, \u0103n m\u00f2n, nhi\u1ec5m b\u1ea9n, qu\u00e1 nhi\u1ec7t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ho\u00e1n \u0111\u1ed5i c\u00e1p &amp; thi\u1ebft b\u1ecb:<\/strong> Lo\u1ea1i tr\u1eeb l\u1ed7i do c\u00e1p\/thi\u1ebft b\u1ecb. Ki\u1ec3m tra b\u1eb1ng c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e3 bi\u1ebft l\u00e0 t\u1ed1t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft &amp; \u0111\u00e8n LED:<\/strong> Quan s\u00e1t h\u00e0nh vi \u0111\u00e8n LED c\u1ed5ng (li\u00ean k\u1ebft, ho\u1ea1t \u0111\u1ed9ng, t\u1ed1c \u0111\u1ed9).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ch\u1ea9n \u0111o\u00e1n ph\u1ea7n m\u1ec1m:<\/strong> S\u1eed d\u1ee5ng nh\u1eadt k\u00fd c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch\/b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn (<code>show interfaces<\/code>), c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n m\u1ea1ng c\u1ee7a h\u1ec7 \u0111i\u1ec1u h\u00e0nh.<\/p><\/li><li><p style=\"margin: 0px 0px 4px;\"><strong>Ki\u1ec3m tra n\u00e2ng cao (n\u1ebfu c\u00f3 th\u1ec3):<\/strong><\/p><ul><li><p style=\"margin: 0px;\">M\u00e1y ki\u1ec3m tra c\u00e1p (ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c, \u0111\u1ee9t m\u1ea1ch, ng\u1eafn m\u1ea1ch, \u0111\u1ea5u sai).<\/p><\/li><li><p style=\"margin: 0px;\">TDR (B\u1ed9 ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian) \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 kh\u00f4ng ph\u00f9 h\u1ee3p tr\u1edf kh\u00e1ng\/l\u1ed7i c\u00e1p.<\/p><\/li><li><p style=\"margin: 0px;\">B\u1ed9 ph\u00e2n t\u00edch giao th\u1ee9c \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i g\u00f3i tin, l\u1ed7i CRC.<\/p><\/li><li><p style=\"margin: 0px;\">\u1ea2nh nhi\u1ec7t d\u01b0\u1edbi t\u1ea3i (\u0111\u1ed1i v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 <strong>PoE<\/strong> ).<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&gt; \ud83d\udd0d \u0110\u1eebng \u0111\u1ec3 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng g\u00e2y t\u1ed5n th\u1ea5t cho b\u1ea1n! \u0110\u00e1nh d\u1ea5u trang h\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u1ec3 s\u1eed d\u1ee5ng trong l\u1ea7n kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 ti\u1ebfp theo. &lt;&lt;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>C\u00e1c gi\u1ea3i ph\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh v\u00e0 chi\u1ebfn l\u01b0\u1ee3c ph\u00f2ng ng\u1eeba<\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udee1\ufe0f <strong>1. \u0110\u1ed1i ph\u00f3 v\u1edbi h\u01b0 h\u1ecfng v\u1eadt l\u00fd v\u00e0 hao m\u00f2n<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3i ph\u00e1p:<\/strong> Thay th\u1ebf c\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ecb h\u01b0 h\u1ecfng. S\u1eed d\u1ee5ng ph\u1ee5 ki\u1ec7n gi\u1ea3m l\u1ef1c k\u00e9o (boot ch\u1ed1ng xoay) ho\u1eb7c k\u1eb9p c\u00e1p. \u0110\u00e0o t\u1ea1o nh\u00e2n vi\u00ean v\u1ec1 c\u00e1ch c\u1eafm\/r\u00fat \u0111\u00fang c\u00e1ch.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ph\u00f2ng ng\u1eeba:<\/strong> Ch\u1ec9 \u0111\u1ecbnh c\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ec1n b\u1ec9 c\u00f3 v\u1ecf b\u1ea3o v\u1ec7 gia c\u1ed1 v\u00e0 x\u1ebfp h\u1ea1ng chu k\u1ef3 gh\u00e9p n\u1ed1i cao.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ec1 xu\u1ea5t t\u1eeb LINK-PP:<\/strong> C\u00e2n nh\u1eafc <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/439792.htm\"><strong>c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n gi\u00fap n\u00e2ng cao \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh m\u1ea1ng v\u00e0 gi\u1ea3m th\u1eddi gian kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 trong t\u01b0\u01a1ng lai.<\/strong><\/a> \u2013 C\u00f3 l\u1edbp ch\u1eafn h\u1ee3p kim k\u1ebdm v\u00e0 \u0111\u1ed9 b\u1ec1n t\u0103ng c\u01b0\u1eddng cho m\u00f4i tr\u01b0\u1eddng c\u00f3 l\u01b0u l\u01b0\u1ee3ng cao.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u26a1 <strong>2. Gi\u1ea3m thi\u1ec3u h\u01b0 h\u1ecfng do EOS\/ESD<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3i ph\u00e1p:<\/strong> Thay th\u1ebf Magjack b\u1ecb h\u01b0 h\u1ecfng. \u0110\u1ea3m b\u1ea3o n\u1ed1i \u0111\u1ea5t v\u1ecf thi\u1ebft b\u1ecb \u0111\u00fang c\u00e1ch. \u00c1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng t\u0129nh \u0111i\u1ec7n (ESD).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ph\u00f2ng ng\u1eeba:<\/strong> Ch\u1ecdn Magjack c\u00f3 ch\u1ec9 s\u1ed1 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/esd-protection-link-pp-smart-factory-transceivers-rj45-cage\/\"><strong>ESD\/s\u00f3ng xung<\/strong><\/a> cao (v\u00ed d\u1ee5: \u00b115 kV ti\u1ebfp x\u00fac\/kh\u00f4ng kh\u00ed). T\u00edch h\u1ee3p \u0111i\u1ed1t TVS \u1edf ph\u00eda \u0111\u01b0\u1eddng d\u00e2y.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ec1 xu\u1ea5t t\u1eeb LINK-PP:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/466200.htm\"><strong>LINK-PP LPJK9436AHNL<\/strong><\/a> cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ESD xu\u1ea5t s\u1eafc (\u00b116 kV) v\u00e0 cu\u1ed9n c\u1ea3m chung (common-mode chokes) t\u00edch h\u1ee3p.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\u2744\ufe0f <strong>3. Gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t do nhi\u1ec7t \u0111\u1ed9 v\u00e0 PoE<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3i ph\u00e1p:<\/strong> C\u1ea3i thi\u1ec7n l\u01b0u th\u00f4ng kh\u00f4ng kh\u00ed, l\u1eafp th\u00eam t\u1ea3n nhi\u1ec7t, gi\u1ea3m t\u1ea3i PoE n\u1ebfu c\u00f3 th\u1ec3, thay th\u1ebf Magjack b\u1ecb qu\u00e1 nhi\u1ec7t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ph\u00f2ng ng\u1eeba:<\/strong> Ch\u1ecdn Magjack \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho l\u1edbp PoE m\u1ee5c ti\u00eau (\u0111\u1eb7c bi\u1ec7t l\u00e0 chu\u1ea9n 802.3bt Lo\u1ea1i 4). \u0110\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf t\u1ea3n nhi\u1ec7t \u0111\u1ea7y \u0111\u1ee7 tr\u00ean b\u1ea3ng m\u1ea1ch in (PCB) (mi\u1ebfng \u0111\u1ec7m t\u1ea3n nhi\u1ec7t\/l\u1ed7 d\u1eabn nhi\u1ec7t, m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ec1 xu\u1ea5t t\u1eeb LINK-PP:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474397.htm\"><strong>LINK-PP LPJQP96282-8AHNL<\/strong><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng PoE++ (Lo\u1ea1i 4) c\u00f4ng su\u1ea5t cao v\u1edbi hi\u1ec7u su\u1ea5t t\u1ea3n nhi\u1ec7t v\u01b0\u1ee3t tr\u1ed9i.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83d\udcf6 <strong>4. Kh\u1eafc ph\u1ee5c c\u00e1c s\u1ef1 c\u1ed1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3i ph\u00e1p:<\/strong> S\u1eed d\u1ee5ng c\u00e1p \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn (STP\/FTP) v\u00e0 n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch. Ki\u1ec3m tra b\u1ed1 tr\u00ed m\u1ea1ch in (PCB) (gi\u1ea3m t\u1ed1i \u0111a chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn, m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t li\u1ec1n m\u1ea1ch, kho\u1ea3ng c\u00e1ch c\u00e1ch ly). Th\u00eam l\u00f5i ferrite.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ph\u00f2ng ng\u1eeba:<\/strong> Ch\u1ecdn Magjack c\u00f3 t\u1ef7 s\u1ed1 lo\u1ea1i b\u1ecf ch\u1ebf \u0111\u1ed9 chung (CMRR) cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1eafn ph\u00f9 h\u1ee3p. \u0110\u1ea3m b\u1ea3o ph\u1ea7n bi\u1ebfn \u00e1p (magnetics) \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi t\u1ed1c \u0111\u1ed9\/kho\u1ea3ng c\u00e1ch m\u1ee5c ti\u00eau.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u1eeb kh\u00f3a:<\/strong> <em>B\u1ed9 n\u1ed1i RJ45 \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn<\/em>, <em>Magjack kh\u00e1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/em>, <em>Bi\u1ebfn \u00e1p c\u00f3 CMRR cao<\/em>.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" >\ud83e\uddfc <strong>5. X\u1eed l\u00fd hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n v\u00e0 nhi\u1ec5m b\u1ea9n<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Gi\u1ea3i ph\u00e1p:<\/strong> L\u00e0m s\u1ea1ch ti\u1ebfp \u0111i\u1ec3m m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn (r\u01b0\u1ee3u isopropyl, ch\u1ea5t l\u00e0m s\u1ea1ch ti\u1ebfp \u0111i\u1ec3m). Thay th\u1ebf c\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ecb \u0103n m\u00f2n nghi\u00eam tr\u1ecdng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ph\u00f2ng ng\u1eeba:<\/strong> Ch\u1ec9 \u0111\u1ecbnh Magjack c\u00f3 ti\u1ebfp \u0111i\u1ec3m ch\u1ed1ng \u0103n m\u00f2n (v\u00ed d\u1ee5: m\u1ea1 v\u00e0ng d\u00e0y tr\u00ean l\u1edbp niken). S\u1eed d\u1ee5ng n\u1eafp b\u1ea3o v\u1ec7 khi c\u1ed5ng kh\u00f4ng s\u1eed d\u1ee5ng. Ch\u1ecdn lo\u1ea1i Magjack k\u00edn ho\u1eb7c c\u00f3 x\u1ebfp h\u1ea1ng IP cao h\u01a1n cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ec1 xu\u1ea5t t\u1eeb LINK-PP:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>B\u1ed9 K\u1ebft N\u1ed1i RJ45 LINK-PP<\/strong><\/a> h\u1ed7 tr\u1ee3 l\u1edbp m\u1ea1 v\u00e0ng m\u1edf r\u1ed9ng 50\u00b5\u201d \u0111\u1ec3 \u0111\u1ea1t kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>B\u1ea3ng so s\u00e1nh gi\u1ea3i ph\u00e1p Magjack RJ45<\/strong><\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>D\u1ea1ng l\u1ed7i<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c t\u1ee9c th\u1eddi<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>Chi\u1ebfn l\u01b0\u1ee3c ph\u00f2ng ng\u1eeba l\u00e2u d\u00e0i<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt th\u00e0nh ph\u1ea7n then ch\u1ed1t c\u1ea7n l\u01b0u \u00fd<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>H\u01b0 h\u1ecfng c\u01a1 h\u1ecdc<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay th\u1ebf Magjack<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1eed d\u1ee5ng b\u1ed9 ph\u1eadn gi\u1ea3m l\u1ef1c k\u00e9o (strain relief); \u0110\u1ea7u n\u1ed1i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec1u chu k\u1ef3 (v\u00ed d\u1ee5: &gt;1500 l\u1ea7n)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>V\u1ecf b\u1ecdc gia c\u1ed1 (v\u00ed d\u1ee5: l\u1edbp ch\u1eafn kim lo\u1ea1i); Thi\u1ebft k\u1ebf ch\u00e2n ch\u1eafc ch\u1eafn<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>EOS\/ESD<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay th\u1ebf Magjack; Ki\u1ec3m tra vi\u1ec7c n\u1ed1i \u0111\u1ea5t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Magjack c\u00f3 x\u1ebfp h\u1ea1ng ESD cao (\u00b115 kV tr\u1edf l\u00ean); \u0110i\u1ed1t TVS<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u1ebfp h\u1ea1ng b\u1ea3o v\u1ec7 ESD; Cu\u1ed9n c\u1ea3m t\u00edch h\u1ee3p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Qu\u00e1 nhi\u1ec7t do PoE<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ea3i thi\u1ec7n l\u00e0m m\u00e1t; Gi\u1ea3m t\u1ea3i; Thay th\u1ebf<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Magjack \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho l\u1edbp PoE m\u1ee5c ti\u00eau; Qu\u1ea3n l\u00fd nhi\u1ec7t tr\u00ean PCB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tu\u00e2n th\u1ee7 chu\u1ea9n PoE (af\/at\/bt); Giao di\u1ec7n mi\u1ebfng \u0111\u1ec7m t\u1ea3n nhi\u1ec7t<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Nhi\u1ec5u t\u00edn hi\u1ec7u\/EMI<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1eed d\u1ee5ng c\u00e1p \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn; Ki\u1ec3m tra b\u1ed1 tr\u00ed m\u1ea1ch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>CMRR cao (&gt;40 dB); Magjack \u0111\u01b0\u1ee3c b\u1ecdc ch\u1eafn; B\u1ed1 tr\u00ed m\u1ea1ch in (PCB) ph\u00f9 h\u1ee3p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>CMRR t\u1ea1i t\u1ea7n s\u1ed1 m\u1ee5c ti\u00eau; Lo\u1ea1i b\u1ecdc ch\u1eafn; \u0110i\u1ec7n \u00e1p c\u00e1ch ly<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0102n m\u00f2n<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00e0m s\u1ea1ch ti\u1ebfp \u0111i\u1ec3m; Thay th\u1ebf n\u1ebfu b\u1ecb \u0103n m\u00f2n nghi\u00eam tr\u1ecdng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u1edbp m\u1ea1 v\u00e0ng d\u00e0y (\u226530\u00b5\u201d); C\u00e1c t\u00f9y ch\u1ecdn k\u00edn; N\u1eafp b\u1ea3o v\u1ec7<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 d\u00e0y l\u1edbp m\u1ea1 ti\u1ebfp \u0111i\u1ec3m; X\u1ebfp h\u1ea1ng IP (v\u00ed d\u1ee5: IP40)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>N\u1ee9t m\u1ed1i h\u00e0n<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u00e0n l\u1ea1i; Thay th\u1ebf Magjack<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thi\u1ebft k\u1ebf footprint ph\u00f9 h\u1ee3p; L\u01b0\u1ee3ng kem h\u00e0n \u0111\u1ea7y \u0111\u1ee7; Gi\u1ea3m l\u1ef1c k\u00e9o<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u01b0\u01a1ng th\u00edch thi\u1ebft k\u1ebf pad; Ti\u1ebfp \u0111i\u1ec3m SMT ch\u1eafc ch\u1eafn<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>L\u1ef1a ch\u1ecdn Magjack RJ45 ph\u00f9 h\u1ee3p: Gi\u1ea3i ph\u00e1p LINK-PP<\/strong><\/h2>\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\/40e47cb6a4cc43fd8e3d1e77e37564e9.jpg\" alt=\"RJ45 Magjack\" class=\"wp-image-5571\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/40e47cb6a4cc43fd8e3d1e77e37564e9.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/40e47cb6a4cc43fd8e3d1e77e37564e9-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/40e47cb6a4cc43fd8e3d1e77e37564e9-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/40e47cb6a4cc43fd8e3d1e77e37564e9-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/40e47cb6a4cc43fd8e3d1e77e37564e9-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn Magjack ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 \u0111\u00e1ng tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 c\u1ed1. <strong>LINK-PP<\/strong> cung c\u1ea5p lo\u1ea1t s\u1ea3n ph\u1ea9m to\u00e0n di\u1ec7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng v\u00e0 \u0111\u1ed9 b\u1ec1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>\u1ee8ng d\u1ee5ng ti\u00eau chu\u1ea9n:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/488776.htm\"><strong>LINK-PP LPJG16540AENL<\/strong><\/a> (100\/1000Base-T, chi ph\u00ed hi\u1ec7u qu\u1ea3)<\/p><\/li><li><p style=\"margin: 0px;\"><strong>PoE++ c\u00f4ng su\u1ea5t cao:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474386.htm\"><strong>LINK-PP LPJQP96282<\/strong><\/a> (Tu\u00e2n th\u1ee7 chu\u1ea9n 802.3bt Lo\u1ea1i 4, t\u1ed1i \u01b0u h\u00f3a t\u1ea3n nhi\u1ec7t)<\/p><\/li><li><p style=\"margin: 0px;\"><strong>M\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474713.htm\"><strong><a href=\"https:\/\/www.example.com\">LINK-PP LPJK0071AINL<\/a><\/strong><\/a> (Nhi\u1ec7t \u0111\u1ed9 c\u00f4ng nghi\u1ec7p: -40\u2103~85\u2103)<\/p><\/li><li><p style=\"margin: 0px;\"><strong>10GBase-T:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474218.htm\"><strong>LINK-PP LPJM9661AGNL<\/strong><\/a> (Hi\u1ec7u n\u0103ng 10 Gigabit, sai l\u1ec7ch th\u1eddi gian th\u1ea5p)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&gt; \ud83d\udd0c N\u00e2ng c\u1ea5p \u0111\u1ed9 tin c\u1eady m\u1ea1ng c\u1ee7a b\u1ea1n! Kh\u00e1m ph\u00e1 to\u00e0n b\u1ed9 d\u00f2ng Magjack RJ45 c\u00f4ng nghi\u1ec7p LINK-PP \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn n\u00eau tr\u00ean. <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/sample.htm\"><strong>Y\u00eau c\u1ea7u b\u1ea3ng d\u1eef li\u1ec7u ho\u1eb7c m\u1eabu th\u1eed ngay h\u00f4m nay!<\/strong><\/a><strong> &lt;&lt;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Th\u1ef1c h\u00e0nh l\u1eafp \u0111\u1eb7t t\u1ed1t nh\u1ea5t v\u00e0 b\u1ea3o tr\u00ec<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Thao t\u00e1c c\u1ea7m n\u1eafm:<\/strong> Lu\u00f4n tu\u00e2n th\u1ee7 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng t\u0129nh \u0111i\u1ec7n (ESD). Tr\u00e1nh ch\u1ea1m v\u00e0o ch\u00e2n ti\u1ebfp \u0111i\u1ec3m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>H\u00e0n:<\/strong> Tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t h\u1ed3 s\u01a1 h\u00e0n l\u1ea1i (reflow profile) \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb. Tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng \u201ctombstoning\u201d.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>B\u1ed1 tr\u00ed m\u1ea1ch in (PCB):<\/strong> Tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ec1 footprint v\u00e0 b\u1ed1 tr\u00ed m\u1ea1ch (kho\u1ea3ng c\u00e1ch c\u00e1ch ly, m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t, v\u00f9ng c\u1ea5m). \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi <strong>Gigabit Ethernet \u1ed5n \u0111\u1ecbnh<\/strong> and <strong>\u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u00e1p:<\/strong> S\u1eed d\u1ee5ng c\u00e1p \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn (Cat5e, Cat6, Cat6a) ph\u00f9 h\u1ee3p v\u1edbi t\u1ed1c \u0111\u1ed9 \u1ee9ng d\u1ee5ng. \u0110\u1ea3m b\u1ea3o \u0111\u1ea7u n\u1ed1i \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i \u0111\u00fang c\u00e1ch.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m tra ph\u00f2ng ng\u1eeba:<\/strong> Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra c\u00e1c c\u1ed5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n b\u1ee5i b\u1ea9n, h\u01b0 h\u1ecfng ho\u1eb7c qu\u00e1 nhi\u1ec7t, \u0111\u1eb7c bi\u1ec7t trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>K\u1ebft lu\u1eadn: \u0110\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i cho Magjack RJ45<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>b\u1ed9 k\u1ebft n\u1ed1i RJ45 Magjack<\/strong><\/a> l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n-c\u01a1 ph\u1ee9c t\u1ea1p, \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u1ea1ng. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c d\u1ea1ng l\u1ed7i ph\u1ed5 bi\u1ebfn \u2014 t\u1eeb <strong>h\u01b0 h\u1ecfng c\u01a1 h\u1ecdc<\/strong> and <strong>ESD<\/strong> to <strong>qu\u00e1 nhi\u1ec7t do PoE<\/strong> and <strong>suy hao t\u00edn hi\u1ec7u<\/strong> \u2013 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 thi\u1ebft k\u1ebf v\u00e0 b\u1ea3o tr\u00ec m\u1ea1ng m\u1ed9t c\u00e1ch b\u1ec1n v\u1eefng. B\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc ch\u1ea9n \u0111o\u00e1n, gi\u1ea3i ph\u00e1p v\u00e0 chi\u1ebfn l\u01b0\u1ee3c ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf \u0111\u00e2y, \u0111\u1ed3ng th\u1eddi l\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng cao nh\u01b0 <strong>\u0111\u1ea7u n\u1ed1i Magjack LINK-PP<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho nh\u1eefng th\u00e1ch th\u1ee9c c\u1ee5 th\u1ec3 (cho d\u00f9 l\u00e0 m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t, d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao hay y\u00eau c\u1ea7u PoE kh\u1eaft khe), b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, c\u1ea3i thi\u1ec7n hi\u1ec7u n\u0103ng m\u1ea1ng v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd ph\u1ea7n c\u1ee9ng.<\/p>","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i quy\u1ebft s\u1ef1 c\u1ed1 Magjack RJ45 v\u1edbi c\u00e1c b\u01b0\u1edbc r\u00f5 r\u00e0ng \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n, s\u1eeda ch\u1eefa v\u00e0 ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i Ethernet trong c\u1ea5u h\u00ecnh m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>","protected":false},"author":1,"featured_media":5570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22],"class_list":["post-5572","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5572","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=5572"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5572\/revisions"}],"predecessor-version":[{"id":11426,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5572\/revisions\/11426"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5570"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}