{"id":4018,"date":"2025-07-25T00:00:00","date_gmt":"2025-07-25T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-phy-physical-layer-basics-explained\/"},"modified":"2026-06-22T08:47:44","modified_gmt":"2026-06-22T08:47:44","slug":"what-is-phy-physical-layer-basics-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-phy-physical-layer-basics-explained","title":{"rendered":"PHY Ethernet l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 b\u1ed9 thu ph\u00e1t l\u1edbp v\u1eadt l\u00fd Ethernet"},"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\/41b851da358b4a47836fa4c46715bdd1.jpg\" alt=\"What is PHY\" class=\"wp-image-4015\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41b851da358b4a47836fa4c46715bdd1.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41b851da358b4a47836fa4c46715bdd1-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41b851da358b4a47836fa4c46715bdd1-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41b851da358b4a47836fa4c46715bdd1-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/41b851da358b4a47836fa4c46715bdd1-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">PHY l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u201cL\u1edbp V\u1eadt l\u00fd\u201d (Physical Layer), t\u1ea1o th\u00e0nh l\u1edbp \u0111\u1ea7u ti\u00ean v\u00e0 th\u1ea5p nh\u1ea5t trong m\u00f4 h\u00ecnh OSI. L\u1edbp v\u1eadt l\u00fd ch\u1ecbu tr\u00e1ch nhi\u1ec7m truy\u1ec1n v\u00e0 nh\u1eadn th\u1ef1c t\u1ebf c\u00e1c bit d\u1eef li\u1ec7u th\u00f4 qua c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n nh\u01b0 c\u00e1p, c\u00e1p quang ho\u1eb7c t\u00edn hi\u1ec7u kh\u00f4ng d\u00e2y. PHY chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n, quang ho\u1eb7c v\u00f4 tuy\u1ebfn, t\u1eeb \u0111\u00f3 l\u00e0m cho kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i c\u01a1 b\u1ea3n gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb tr\u1edf n\u00ean kh\u1ea3 thi. V\u00ec PHY \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 hi\u1ec7u n\u0103ng m\u1ea1ng, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 n\u00f3 l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai quan t\u00e2m \u0111\u1ebfn c\u00f4ng ngh\u1ec7 m\u1ea1ng v\u00e0 truy\u1ec1n th\u00f4ng. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng m\u1ea1ng, <strong>PHY Ethernet<\/strong> (B\u1ed9 thu ph\u00e1t l\u1edbp v\u1eadt l\u00fd) l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n then ch\u1ed1t k\u1ebft n\u1ed1i th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n MAC v\u1edbi h\u1ec7 th\u1ed1ng c\u00e1p ho\u1eb7c c\u00e1p quang v\u1eadt l\u00fd d\u00f9ng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch Ethernet PHY l\u00e0 g\u00ec, n\u00eau ra c\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a n\u00f3, kh\u00e1m ph\u00e1 c\u00e1ch th\u1ee9c giao ti\u1ebfp v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng (magnetics), v\u00e0 nh\u1ea5n m\u1ea1nh c\u00e1ch <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">B\u1ed9 n\u1ed1i RJ45 LINK\u2011PP<\/a> h\u1ed7 tr\u1ee3 t\u00edch h\u1ee3p PHY t\u1ed1i \u01b0u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Ethernet PHY l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>PHY<\/strong> tri\u1ec3n khai <strong>l\u1edbp v\u1eadt l\u00fd trong m\u00f4 h\u00ecnh OSI<\/strong>, chuy\u1ec3n c\u00e1c khung d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 th\u00e0nh t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 truy\u1ec1n qua c\u00e1p xo\u1eafn \u0111\u00f4i ho\u1eb7c ph\u01b0\u01a1ng ti\u1ec7n quang h\u1ecdc, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Th\u00e0nh ph\u1ea7n n\u00e0y th\u01b0\u1eddng bao g\u1ed3m c\u1ea3 <strong>Ti\u1ec3u l\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd (Physical Coding Sublayer \u2013 PCS)<\/strong> v\u00e0 <strong>Ph\u1ee5 thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd (PMD)<\/strong> giao di\u1ec7n d\u00e0nh cho ph\u01b0\u01a1ng ti\u1ec7n \u0111i\u1ec7n ho\u1eb7c quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede \u0111\u1ea7u k\u1ef9 thu\u1eadt s\u1ed1, PHY k\u1ebft n\u1ed1i v\u1edbi <strong>MAC<br><\/strong> (\u0110i\u1ec1u khi\u1ec3n truy c\u1eadp m\u00f4i tr\u01b0\u1eddng \u2013 Media Access Control) th\u00f4ng qua c\u00e1c giao di\u1ec7n ti\u00eau chu\u1ea9n nh\u01b0 <strong>MII, RMII, RGMII ho\u1eb7c SGMII<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"448\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1.jpg\" alt=\"Ethernet PHY\" class=\"wp-image-4016\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1-300x112.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1-1024x382.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1-768x287.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3936538278a941a4a15737a90af3a5c1-18x7.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a Ethernet PHY<\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u (K\u1ef9 thu\u1eadt s\u1ed1 \u2194 T\u01b0\u01a1ng t\u1ef1):<\/strong> Chuy\u1ec3n lu\u1ed3ng bit \u1edf t\u1ea7ng MAC th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n ho\u1eb7c quang ph\u00f9 h\u1ee3p \u0111\u1ec3 truy\u1ec1n \u0111i, \u0111\u1ed3ng th\u1eddi kh\u00f4i ph\u1ee5c d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 khi nh\u1eadn.<\/p><\/li><li><p><strong>M\u00e3 h\u00f3a &amp; \u0110i\u1ec1u ch\u1ebf:<\/strong> X\u1eed l\u00fd c\u00e1c chu\u1ea9n m\u00e3 h\u00f3a nh\u01b0 MLT\u20113 (100BASE\u2011TX), PAM\u20115 (1000BASE\u2011T) ho\u1eb7c PAM\u201116 (10GBASE\u2011T), t\u00f9y thu\u1ed9c v\u00e0o th\u1ebf h\u1ec7 Ethernet.<\/p><\/li><li><p><strong>Kh\u00f4i ph\u1ee5c xung nh\u1ecbp\/d\u1eef li\u1ec7u:<\/strong> \u0110\u1ed3ng b\u1ed9 v\u00e0 kh\u00f4i ph\u1ee5c xung nh\u1ecbp t\u1eeb c\u00e1c chuy\u1ec3n ti\u1ebfp trong t\u00edn hi\u1ec7u nh\u1eadn \u0111\u01b0\u1ee3c.<\/p><\/li><li><p><strong>T\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng &amp; Ph\u00e1t hi\u1ec7n k\u1ebft n\u1ed1i:<\/strong> Th\u01b0\u01a1ng l\u01b0\u1ee3ng t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i (10\/100\/1000 Mbps ho\u1eb7c cao h\u01a1n) v\u00e0 ch\u1ebf \u0111\u1ed9 song c\u00f4ng (duplex), \u0111\u1ed3ng th\u1eddi thi\u1ebft l\u1eadp ho\u1eb7c gi\u00e1m s\u00e1t tr\u1ea1ng th\u00e1i k\u1ebft n\u1ed1i.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ch\u1ebf \u0111\u1ed9 \u0111\u1ea7u ra b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u0111\u01b0\u1eddng d\u00e2y:<\/strong> Qu\u1ea3n l\u00fd vi\u1ec7c PHY s\u1eed d\u1ee5ng <strong>ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n<\/strong> (\u0111\u1ea7u ra vi sai ngu\u1ed3n d\u00f2ng) hay <strong>ch\u1ebf \u0111\u1ed9 \u0111i\u1ec7n \u00e1p<\/strong> (\u0111\u1ea7u ra dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p), \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi bi\u1ebfn \u00e1p v\u00e0 hi\u1ec7u n\u0103ng RF.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Note:<\/strong> PAM-16 l\u00e0 s\u01a1 \u0111\u1ed3 \u0111i\u1ec1u ch\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ti\u00eau chu\u1ea9n IEEE 802.3an cho Ethernet 10GBASE-T. S\u01a1 \u0111\u1ed3 n\u00e0y y\u00eau c\u1ea7u c\u00e1c c\u01a1 ch\u1ebf <strong>S\u1eeda l\u1ed7i ti\u1ebfn (Forward Error Correction \u2013 FEC)<\/strong> ph\u1ee9c t\u1ea1p nh\u1eb1m \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u tr\u00ean c\u00e1p xo\u1eafn \u0111\u00f4i.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >PHY ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n so v\u1edbi PHY ch\u1ebf \u0111\u1ed9 \u0111i\u1ec7n \u00e1p<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>PHY ch\u1ebf \u0111\u1ed9 \u0111i\u1ec7n \u00e1p:<\/strong> \u0110\u1ea7u ra dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p c\u1ed1 \u0111\u1ecbnh (v\u00ed d\u1ee5: \u00b13,3 V). Th\u01b0\u1eddng g\u1eb7p trong c\u00e1c PHY 10\/100 Mbps c\u0169, nh\u01b0ng k\u00e9m b\u1ec1n v\u1eefng h\u01a1n v\u1ec1 m\u1eb7t t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 cao hi\u1ec7n \u0111\u1ea1i.<\/p><\/li><li><p><strong>PHY ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n:<\/strong> Ph\u00e1t ra d\u00f2ng vi sai kh\u00f4ng \u0111\u1ed5i (th\u01b0\u1eddng l\u00e0 \u00b18 mA), t\u1ea1o ra dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p tr\u00ean cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p ho\u1eb7c \u0111i\u1ec7n tr\u1edf t\u1ea3i. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n ng\u00e0nh cho <strong>t\u1ed1c \u0111\u1ed9 1000BASE\u2011T tr\u1edf l\u00ean<\/strong> v\u00ec n\u00f3 \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u vi sai \u1ed5n \u0111\u1ecbnh, gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c thi\u1ebft k\u1ebf d\u1ef1a tr\u00ean c\u1ea3m \u1ee9ng (magnetics).<\/p><\/li>\n<\/ul>\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\/a3f4d0caeeca4ba2bb7ad94315e23ba5.jpg\" alt=\"Current\u2011Mode vs Voltage\u2011Mode PHY\" class=\"wp-image-4017\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a3f4d0caeeca4ba2bb7ad94315e23ba5.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a3f4d0caeeca4ba2bb7ad94315e23ba5-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a3f4d0caeeca4ba2bb7ad94315e23ba5-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a3f4d0caeeca4ba2bb7ad94315e23ba5-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a3f4d0caeeca4ba2bb7ad94315e23ba5-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Ethernet PHY giao ti\u1ebfp v\u1edbi c\u1ea3m \u1ee9ng (magnetics) v\u00e0 c\u1ed5ng RJ45 nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u ra c\u1ee7a Ethernet PHY ph\u1ea3i \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i th\u00f4ng qua <strong>linh ki\u1ec7n t\u1eeb t\u00ednh<\/strong> (bi\u1ebfn \u00e1p v\u00e0 cu\u1ed9n ch\u1eb7n ch\u1ebf \u0111\u1ed9 chung) \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u1ed5ng RJ45. C\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y cung c\u1ea5p <strong>c\u00e1ch ly galvanic<\/strong>, <strong>ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng (th\u01b0\u1eddng l\u00e0 100 \u03a9 vi sai)<\/strong>, and <strong>gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c s\u1ea3n ph\u1ea9m <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>nh\u01b0<\/strong><\/a> (MagJack) c\u1ee7a LINK\u2011PP t\u00edch h\u1ee3p s\u1eb5n c\u00e1c m\u1ea1ng bi\u1ebfn \u00e1p n\u00e0y ngay trong th\u00e2n c\u1ed5ng, mang l\u1ea1i gi\u1ea3i ph\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p s\u1eb5n gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a b\u1ed1 tr\u00ed m\u1ea1ch in (PCB) v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch \u1edf m\u1ee9c PHY.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn tr\u00fac \u0111i\u1ec3n h\u00ecnh:<\/p>\n\n\n\n<pre class=\"wp-block-code\">\n<code>MAC + SGMII\/RGMII \u2192 PHY (ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n) \u2192 C\u1ea3m \u1ee9ng t\u00edch h\u1ee3p (MagJack) \u2192 RJ45 \u2192 C\u00e1p Ethernet<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u1ed9t<strong> PHY<\/strong> c\u00f9ng v\u1edbi m\u1ed9t <strong>MagJack LINK\u2011PP<\/strong> \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u t\u1ed1i \u01b0u, hi\u1ec7u n\u0103ng EMI v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n IEEE 802.3. Nhi\u1ec1u s\u1ea3n ph\u1ea9m LINK\u2011PP (v\u00ed d\u1ee5:. <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/439792.htm\">LPJG0926HENL<br><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/478631.htm\">LPJG0933HENL<\/a>) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c PHY Gigabit v\u00e0 \u0111a-Gigabit, \u0111\u1ed3ng th\u1eddi h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng PoE+ \/ 10\/100\/1000 Base-T.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t <strong>PHY Ethernet<\/strong> l\u00e0 m\u1ed9t m\u00f4-\u0111un thu ph\u00e1t tinh vi cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n tr\u00ean c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa <strong>PHY ch\u1ebf \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 PHY ch\u1ebf \u0111\u1ed9 \u0111i\u1ec7n \u00e1p<\/strong>, c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn <strong>b\u1ed9 n\u1ed1i RJ45 c\u1ea3m \u1ee9ng (magnetic connectors) LINK\u2011PP<\/strong> t\u01b0\u01a1ng th\u00edch v\u00e0 x\u00e2y d\u1ef1ng ph\u1ea7n c\u1ee9ng Ethernet \u0111\u1ea1t hi\u1ec7u n\u0103ng v\u01b0\u1ee3t tr\u1ed9i c\u0169ng nh\u01b0 tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t v\u1ec1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI).<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u PHY Ethernet l\u00e0 g\u00ec, c\u00e1ch n\u00f3 k\u1ebft n\u1ed1i MAC v\u1edbi m\u00f4i tr\u01b0\u1eddng m\u1ea1ng, c\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i, c\u00e1c lo\u1ea1i t\u00edn hi\u1ec7u v\u00e0 c\u00e1ch n\u00f3 ph\u1ed1i h\u1ee3p v\u1edbi bi\u1ebfn \u00e1p LINK\u2011PP trong thi\u1ebft k\u1ebf Ethernet.<\/p>","protected":false},"author":1,"featured_media":4015,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22],"class_list":["post-4018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-integrated-rj45-connectors"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4018","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=4018"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4018\/revisions"}],"predecessor-version":[{"id":11300,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4018\/revisions\/11300"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4015"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}