{"id":4026,"date":"2025-05-20T00:00:00","date_gmt":"2025-05-20T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-you-need-to-know-about-power-over-ethernet\/"},"modified":"2026-06-22T09:34:25","modified_gmt":"2026-06-22T09:34:25","slug":"what-you-need-to-know-about-power-over-ethernet","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-you-need-to-know-about-power-over-ethernet","title":{"rendered":"Nh\u1eefng \u0110i\u1ec1u B\u1ea1n C\u1ea7n Bi\u1ebft V\u1ec1 C\u00f4ng Ngh\u1ec7 C\u1ea5p Ngu\u1ed3n Qua Ethernet (PoE)"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><strong>Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 c\u00e1ch m\u1ea1ng k\u1ebft h\u1ee3p vi\u1ec7c truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng v\u00e0 d\u1eef li\u1ec7u th\u00f4ng qua m\u1ed9t c\u00e1p Ethernet duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u01a1n gi\u1ea3n h\u00f3a k\u1ebft n\u1ed1i cho c\u00e1c thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i. PoE lo\u1ea1i b\u1ecf nhu c\u1ea7u v\u1ec1 c\u00e1c \u1ed5 c\u1eafm \u0111i\u1ec7n ri\u00eang bi\u1ec7t, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p thi\u1ebft y\u1ebfu trong c\u00e1c m\u00f4i tr\u01b0\u1eddng nh\u01b0 v\u0103n ph\u00f2ng, tr\u01b0\u1eddng h\u1ecdc v\u00e0 b\u1ec7nh vi\u1ec7n. \u0110\u1ed9 tin c\u1eady c\u1ee7a n\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, c\u1ea5p \u0111i\u1ec7n cho c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 camera IP v\u00e0 c\u1ea3m bi\u1ebfn, ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1312\" height=\"736\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785.webp\" alt=\"Power Over Ethernet (PoE\uff09\" class=\"wp-image-4023\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785.webp 1312w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785-300x168.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785-1024x574.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785-768x431.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e92483aa98234ee2ac57bfe6e2232785-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u01a1 ch\u1ebf c\u1ee7a PoE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>c\u00f4ng ngh\u1ec7 Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong> cho ph\u00e9p truy\u1ec1n \u0111\u1ed3ng th\u1eddi c\u1ea3 \u0111i\u1ec7n n\u0103ng v\u00e0 d\u1eef li\u1ec7u tr\u00ean c\u00e1c c\u00e1p Ethernet ti\u00eau chu\u1ea9n, ch\u1eb3ng h\u1ea1n nh\u01b0 Cat5e ho\u1eb7c Cat6. C\u00f4ng ngh\u1ec7 n\u00e0y lo\u1ea1i b\u1ecf nhu c\u1ea7u v\u1ec1 c\u00e1c ngu\u1ed3n \u0111i\u1ec7n ri\u00eang bi\u1ec7t, \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u00e0 gi\u1ea3m t\u00ecnh tr\u1ea1ng l\u1ed9n x\u1ed9n d\u00e2y c\u00e1p. Qu\u00e1 tr\u00ecnh b\u1eaft \u0111\u1ea7u t\u1eeb <strong>Thi\u1ebft b\u1ecb cung c\u1ea5p \u0111i\u1ec7n (PSE)<\/strong>, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 chuy\u1ec3n m\u1ea1ch h\u1ed7 tr\u1ee3 PoE ho\u1eb7c b\u1ed9 ch\u00e8n \u0111i\u1ec7n (injector), v\u1ed1n ti\u00eam d\u00f2ng \u0111i\u1ec7n v\u00e0o c\u00e1p Ethernet. Sau \u0111\u00f3, c\u00e1p n\u00e0y truy\u1ec1n d\u00f2ng \u0111i\u1ec7n n\u00e0y \u0111\u1ebfn m\u1ed9t <strong>Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/strong>, ch\u1eb3ng h\u1ea1n nh\u01b0 camera IP ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i VoIP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00ean trong PD, b\u1ed9 t\u00e1ch (splitter) t\u00e1ch \u0111i\u1ec7n n\u0103ng ra kh\u1ecfi d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang kh\u00f4ng g\u00e2y nhi\u1ec5u l\u1eabn nhau. Vi\u1ec7c t\u00e1ch bi\u1ec7t n\u00e0y cho ph\u00e9p thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 trong khi v\u1eabn duy tr\u00ec kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady. C\u00e1c h\u1ec7 th\u1ed1ng PoE \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cung c\u1ea5p \u0111i\u1ec7n m\u1ed9t c\u00e1ch an to\u00e0n, th\u01b0\u1eddng \u1edf m\u1ee9c 48 V m\u1ed9t chi\u1ec1u (DC), v\u00e0 t\u1ef1 \u0111\u1ed9ng ng\u1eebng c\u1ea5p \u0111i\u1ec7n khi PD b\u1ecb ng\u1eaft k\u1ebft n\u1ed1i. C\u01a1 ch\u1ebf n\u00e0y \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng v\u00e0 ng\u0103n ng\u1eeba l\u00e3ng ph\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng PoE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t h\u1ec7 th\u1ed1ng PoE bao g\u1ed3m nhi\u1ec1u th\u00e0nh ph\u1ea7n ch\u00ednh ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng v\u00e0 d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch li\u1ec1n m\u1ea1ch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Thi\u1ebft b\u1ecb cung c\u1ea5p ngu\u1ed3n (PSE):<\/strong> Th\u00e0nh ph\u1ea7n n\u00e0y cung c\u1ea5p \u0111i\u1ec7n cho c\u00e1p Ethernet. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m b\u1ed9 chuy\u1ec3n m\u1ea1ch h\u1ed7 tr\u1ee3 PoE v\u00e0 b\u1ed9 ch\u00e8n \u0111i\u1ec7n (injector).<\/p><\/li><li><p><strong>Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD):<\/strong> C\u00e1c thi\u1ebft b\u1ecb n\u00e0y nh\u1eadn \u0111i\u1ec7n n\u0103ng v\u00e0 d\u1eef li\u1ec7u t\u1eeb c\u00e1p Ethernet. C\u00e1c v\u00ed d\u1ee5 ph\u1ed5 bi\u1ebfn g\u1ed3m \u0111i\u1ec3m truy c\u1eadp kh\u00f4ng d\u00e2y, camera IP v\u00e0 h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng th\u00f4ng minh.<\/p><\/li><li><p><strong>C\u00e1p Ethernet:<\/strong> C\u00e1c c\u00e1p n\u00e0y truy\u1ec1n c\u1ea3 \u0111i\u1ec7n n\u0103ng v\u00e0 d\u1eef li\u1ec7u. C\u00e1p lo\u1ea1i 5e l\u00e0 y\u00eau c\u1ea7u t\u1ed1i thi\u1ec3u, nh\u01b0ng c\u00e1p lo\u1ea1i 6 ho\u1eb7c 6A \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n.<\/p><\/li><li><p><strong>B\u1ed9 t\u00e1ch (Splitters):<\/strong> C\u00e1c b\u1ed9 t\u00e1ch n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng h\u1ed7 tr\u1ee3 PoE nh\u1eb1m t\u00e1ch \u0111i\u1ec7n n\u0103ng ra kh\u1ecfi d\u1eef li\u1ec7u, gi\u00fap thi\u1ebft b\u1ecb t\u01b0\u01a1ng th\u00edch v\u1edbi h\u1ec7 th\u1ed1ng PoE.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng PoE v\u1eadn h\u00e0nh hi\u1ec7u qu\u1ea3, ngay c\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng ph\u1ee9c t\u1ea1p. V\u00ed d\u1ee5, thi\u1ebft k\u1ebf l\u01b0\u1edbi k\u1ebft n\u1ed1i ph\u1ed5 qu\u00e1t (UCG) gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c \u0111i d\u00e2y v\u00e0 t\u0103ng t\u00ednh linh ho\u1ea1t trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c chu\u1ea9n PoE<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 143px;\"\/><col style=\"width: 241px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"143\"><p>Ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"241\"><p>\u0110i\u1ec7n n\u0103ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>C\u00e1c \u1ee9ng d\u1ee5ng ph\u00f9 h\u1ee3p<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"143\"><p><strong>IEEE 802.3af<\/strong><\/p><p><strong>(PoE)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"241\"><p>T\u1ed1i \u0111a 15,4 W m\u1ed7i c\u1ed5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 \u00edt \u0111i\u1ec7n n\u0103ng (camera IP, \u0111i\u1ec7n tho\u1ea1i VoIP)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"143\"><p><strong>IEEE 802.3at<\/strong><br\/><strong>(PoE+)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"241\"><p>T\u1ed1i \u0111a 25,5 W m\u1ed7i c\u1ed5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Camera IP n\u00e2ng cao, thi\u1ebft b\u1ecb h\u1ed9i ngh\u1ecb truy\u1ec1n h\u00ecnh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"143\"><p><strong>IEEE 802.3bt<\/strong><\/p><p><strong>(PoE++\/4PPoE)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"241\"><p>T\u1ed1i \u0111a 51 W (Lo\u1ea1i 3) v\u00e0 71,3 W (Lo\u1ea1i 4) m\u1ed7i c\u1ed5ng.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thi\u1ebft b\u1ecb y\u00eau c\u1ea7u cao v\u1ec1 \u0111i\u1ec7n n\u0103ng (m\u00e1y t\u00ednh x\u00e1ch tay, bi\u1ec3n qu\u1ea3ng c\u00e1o k\u1ef9 thu\u1eadt s\u1ed1)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"143\"><p><strong>IEEE 802.3bu<\/strong><br\/>(<strong>PoDL)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"241\"><p>t\u1ed1i \u0111a 50 W<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u1ee8ng d\u1ee5ng trong \u00f4 t\u00f4 v\u00e0 c\u00f4ng nghi\u1ec7p<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 an to\u00e0n tr\u00ean to\u00e0n b\u1ed9 c\u00e1c thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3 PoE, gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng h\u1ed7 tr\u1ee3 PoE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 th\u1eafc m\u1eafc li\u1ec7u PoE c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c v\u1edbi c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng h\u1ed7 tr\u1ee3 PoE hay kh\u00f4ng. C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 c\u00f3, nh\u01b0ng c\u1ea7n th\u00eam m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n ph\u1ee5 tr\u1ee3. B\u1ed9 t\u00e1ch PoE c\u00f3 th\u1ec3 t\u00e1ch \u0111i\u1ec7n n\u0103ng ra kh\u1ecfi d\u1eef li\u1ec7u, gi\u00fap c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng h\u1ed7 tr\u1ee3 PoE ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru. C\u00e1c b\u1ed9 ch\u00e8n \u0111i\u1ec7n (injector) PoE c\u0169ng l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p, cung c\u1ea5p \u0111i\u1ec7n cho c\u00e1c thi\u1ebft b\u1ecb thi\u1ebfu ch\u1ee9c n\u0103ng PoE t\u00edch h\u1ee3p s\u1eb5n. C\u00f2n c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch PoE th\u00ec t\u1ef1 \u0111\u1ed9ng ph\u00e1t hi\u1ec7n c\u00e1c thi\u1ebft b\u1ecb t\u01b0\u01a1ng th\u00edch v\u00e0 c\u1ea5p \u0111i\u1ec7n m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng h\u1ed7 tr\u1ee3 PoE.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng \u0111\u1ed9 d\u00e0i c\u00e1p c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a PoE. C\u00e1c c\u00e1p qu\u00e1 d\u00e0i c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i Ethernet nh\u01b0ng l\u1ea1i kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 \u0111i\u1ec7n n\u0103ng. C\u00e1c thi\u1ebft b\u1ecb c\u00f3 y\u00eau c\u1ea7u \u0111i\u1ec7n n\u0103ng cao h\u01a1n c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 d\u00e0i hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1p. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng cao nh\u01b0 c\u1ee7a LINK-PP <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm?ca=380&amp;cv=1982\">\u0110\u1ea7u n\u1ed1i RJ45 t\u00edch h\u1ee3p<\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm?ca=547&amp;cv=3196\">Bi\u1ebfn \u00e1p LAN<\/a>, v\u1ed1n h\u1ed7 tr\u1ee3 ch\u1ee9c n\u0103ng PoE v\u00e0 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\ud83d\udca1 <strong>M\u1eb9o:<br><\/strong> Khi t\u00edch h\u1ee3p PoE v\u00e0o m\u1ea1ng c\u1ee7a b\u1ea1n, lu\u00f4n ki\u1ec3m tra k\u1ef9 y\u00eau c\u1ea7u \u0111i\u1ec7n n\u0103ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb v\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb PoE b\u1ea1n \u0111ang s\u1eed d\u1ee5ng.<\/p><\/blockquote>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"2560\" height=\"1440\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-scaled.jpg\" alt=\"Power Over Ethernet (PoE\uff09\" class=\"wp-image-4024\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-scaled.jpg 2560w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-1536x864.jpg 1536w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-2048x1152.jpg 2048w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/4710510ff00c4622bc3f228acf353e37-18x10.jpg 18w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong><p>The most significant benefit. Utilize existing fiber runs fully without costly new installations. Ideal for<\/p><\/strong> Gi\u1ea3m chi ph\u00ed cho c\u00e1c \u1ed5 c\u1eafm \u0111i\u1ec7n v\u00e0 th\u1ee3 l\u1eafp \u0111\u1eb7t chuy\u00ean nghi\u1ec7p b\u1eb1ng c\u00e1ch cung c\u1ea5p \u0111i\u1ec7n qua h\u1ec7 th\u1ed1ng c\u00e1p m\u1ea1ng hi\u1ec7n c\u00f3.<\/p><\/li><li><p><strong>T\u00ednh linh ho\u1ea1t trong l\u1eafp \u0111\u1eb7t:<\/strong> Cho ph\u00e9p b\u1ed1 tr\u00ed c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u1edf nh\u1eefng v\u1ecb tr\u00ed kh\u00f4ng c\u00f3 \u1ed5 c\u1eafm \u0111i\u1ec7n, t\u1ed1i \u01b0u h\u00f3a v\u00f9ng ph\u1ee7 s\u00f3ng cho c\u00e1c \u0111i\u1ec3m truy c\u1eadp Wi-Fi v\u00e0 camera gi\u00e1m s\u00e1t.<\/p><\/li><li><p><strong>Qu\u1ea3n l\u00fd ngu\u1ed3n t\u1eadp trung:<\/strong> Cho ph\u00e9p t\u1eaft\/b\u1eadt l\u1ea1i ngu\u1ed3n t\u1eeb xa v\u00e0 gi\u00e1m s\u00e1t c\u00e1c thi\u1ebft b\u1ecb th\u00f4ng qua b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng ho\u1eb7c thi\u1ebft b\u1ecb midspan, c\u1ea3i thi\u1ec7n th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u01a1n gi\u1ea3n h\u00f3a b\u1ea3o tr\u00ec.<\/p><\/li><li><p><strong>\u0110\u1ed9 an to\u00e0n n\u00e2ng cao:<\/strong> Ho\u1ea1t \u0111\u1ed9ng \u1edf \u0111i\u1ec7n \u00e1p th\u1ea5p (th\u01b0\u1eddng t\u1eeb 44\u201357 V m\u1ed9t chi\u1ec1u) gi\u00fap gi\u1ea3m r\u1ee7i ro v\u1ec1 nguy c\u01a1 \u0111i\u1ec7n so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n xoay chi\u1ec1u (AC).<\/p><\/li><li><p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng: <\/strong>H\u1ed7 tr\u1ee3 m\u1ed9t lo\u1ea1t thi\u1ebft b\u1ecb r\u1ed9ng l\u1edbn (\u0111i\u1ec7n tho\u1ea1i VoIP, \u0111\u00e8n LED, c\u1ea3m bi\u1ebfn t\u00f2a nh\u00e0) m\u00e0 kh\u00f4ng c\u1ea7n h\u1ea1 t\u1ea7ng c\u1ea5p \u0111i\u1ec7n ri\u00eang bi\u1ec7t, gi\u00fap m\u1edf r\u1ed9ng m\u1ea1ng d\u1ec5 d\u00e0ng h\u01a1n.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>Nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>H\u1ea1n ch\u1ebf v\u1ec1 ngu\u1ed3n \u0111i\u1ec7n:<\/strong> C\u00e1c h\u1ec7 th\u1ed1ng PoE c\u00f3 gi\u1edbi h\u1ea1n v\u1ec1 kh\u1ea3 n\u0103ng cung c\u1ea5p \u0111i\u1ec7n, do \u0111\u00f3 c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng cho c\u00e1c thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng. V\u00ed d\u1ee5, chu\u1ea9n IEEE 802.3af cung c\u1ea5p t\u1ed1i \u0111a 15,4 watt, trong khi chu\u1ea9n ti\u00ean ti\u1ebfn h\u01a1n IEEE 802.3bt c\u00f3 th\u1ec3 cung c\u1ea5p t\u1ed1i \u0111a 90 watt. C\u00e1c thi\u1ebft b\u1ecb nh\u01b0 m\u00e1y t\u00ednh x\u00e1ch tay ho\u1eb7c m\u00e0n h\u00ecnh l\u1edbn th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi nhi\u1ec1u \u0111i\u1ec7n n\u0103ng h\u01a1n m\u1ee9c PoE c\u00f3 th\u1ec3 cung c\u1ea5p. <\/p><\/li><li><p><strong>Chi ph\u00ed ban \u0111\u1ea7u: <\/strong>M\u1eb7c d\u00f9 PoE gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eafp \u0111\u1eb7t, chi ph\u00ed ban \u0111\u1ea7u c\u00f3 th\u1ec3 cao h\u01a1n so v\u1edbi c\u00e1c c\u1ea5u h\u00ecnh truy\u1ec1n th\u1ed1ng. C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch PoE v\u00e0 b\u1ed9 ti\u00eam \u0111i\u1ec7n (injector) \u0111\u1eaft h\u01a1n thi\u1ebft b\u1ecb m\u1ea1ng ti\u00eau chu\u1ea9n. N\u1ebfu b\u1ea1n n\u00e2ng c\u1ea5p m\u1ed9t m\u1ea1ng hi\u1ec7n c\u00f3, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 c\u1ea7n thay th\u1ebf c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi PoE, l\u00e0m t\u0103ng th\u00eam chi ph\u00ed. M\u1eb7c d\u00f9 PoE gi\u00fap gi\u1ea3m chi ph\u00ed v\u1eadn h\u00e0nh d\u00e0i h\u1ea1n, nh\u01b0ng kho\u1ea3n \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u c\u00f3 th\u1ec3 l\u00e0 r\u00e0o c\u1ea3n \u0111\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p nh\u1ecf ho\u1eb7c c\u00e1c d\u1ef1 \u00e1n c\u00f3 ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf. Vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch m\u1ea1ng m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn s\u1ebd gi\u00fap b\u1ea1n c\u00e2n b\u1eb1ng nh\u1eefng chi ph\u00ed n\u00e0y v\u1edbi c\u00e1c l\u1ee3i \u00edch m\u00e0 PoE mang l\u1ea1i.<\/p><\/li><li><p><strong>Lo ng\u1ea1i v\u1ec1 b\u1ea3o m\u1eadt:<\/strong> M\u1ea1ng PoE t\u1ea1o ra c\u00e1c r\u1ee7i ro ti\u1ec1m \u1ea9n v\u1ec1 an ninh m\u1ea1ng m\u00e0 b\u1ea1n c\u1ea7n xem x\u00e9t. Vi\u1ec7c hi\u1ec7n \u0111\u1ea1i h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng PoE cho m\u1ee5c \u0111\u00edch an ninh v\u1eadt l\u00fd, ch\u1eb3ng h\u1ea1n nh\u01b0 camera IP, c\u00f3 th\u1ec3 l\u00e0m l\u1ed9 c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt. <\/p><\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\ud83d\udd12 <strong>M\u1eb9o:<br><\/strong> Th\u01b0\u1eddng xuy\u00ean ki\u1ec3m to\u00e1n m\u1ea1ng PoE c\u1ee7a b\u1ea1n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 kh\u1eafc ph\u1ee5c c\u00e1c l\u1ed7 h\u1ed5ng ti\u1ec1m \u1ea9n tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>B\u1ed9 k\u1ebft n\u1ed1i RJ45 t\u00edch h\u1ee3p v\u00e0 bi\u1ebfn \u00e1p LAN c\u1ee7a LINK-PP h\u1ed7 tr\u1ee3 PoE<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm?ca=380&amp;cv=1982\"><strong>B\u1ed9 k\u1ebft n\u1ed1i RJ45 h\u1ed7 tr\u1ee3 PoE<\/strong><\/a><strong>:<\/strong><\/p><ul><li><p>C\u00e1c m\u1eabu nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/481912.htm\"><em>LPJ1253AHNL<\/em><\/a> and <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/474128.htm\"><em>LPJM96282AGNL<\/em><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng PoE v\u00e0 PoE+, v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n t\u1eeb t\u00ednh t\u00edch h\u1ee3p nh\u1eb1m \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n IEEE.<\/p><\/li><li><p>C\u00e1c b\u1ed9 k\u1ebft n\u1ed1i n\u00e0y h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 l\u00ean \u0111\u1ebfn 10G Base-T v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 camera k\u1ef9 thu\u1eadt s\u1ed1, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 t\u01b0\u1eddng l\u1eeda m\u1ea1ng.<\/p><\/li><\/ul><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm?ca=547&amp;cv=3196\"><strong>Bi\u1ebfn \u00e1p LAN h\u1ed7 tr\u1ee3 PoE<\/strong><\/a><strong>:<\/strong><\/p><ul><li><p>C\u00e1c bi\u1ebfn \u00e1p LAN c\u1ee7a LINK-PP \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c \u1ee9ng d\u1ee5ng PoE, PoE+ v\u00e0 PoE++, \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n t\u1ea3i \u0111i\u1ec7n n\u0103ng hi\u1ec7u qu\u1ea3 v\u00e0 t\u1ed5n th\u1ea5t t\u00edn hi\u1ec7u \u1edf m\u1ee9c t\u1ed1i thi\u1ec3u.<\/p><\/li><li><p>Ch\u00fang h\u1ed7 tr\u1ee3 nhi\u1ec1u t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau, bao g\u1ed3m 10\/100M\/1\/2.5\/5\/10G, gi\u00fap linh ho\u1ea1t \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u m\u1ea1ng kh\u00e1c nhau.<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y, LINK-PP cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady cho nhu c\u1ea7u m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n v\u00e0 \u1ee9ng d\u1ee5ng PoE m\u1edbi nh\u1ea5t.<\/p>","protected":false},"excerpt":{"rendered":"<p>C\u00f4ng ngh\u1ec7 c\u1ea5p ngu\u1ed3n qua Ethernet (PoE) k\u1ebft h\u1ee3p truy\u1ec1n t\u1ea3i \u0111i\u1ec7n v\u00e0 d\u1eef li\u1ec7u qua m\u1ed9t c\u00e1p duy nh\u1ea5t, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eafp \u0111\u1eb7t cho c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 camera IP, \u0111i\u1ec7n tho\u1ea1i VoIP v\u00e0 h\u1ec7 th\u1ed1ng IoT.<\/p>","protected":false},"author":1,"featured_media":4025,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[22],"class_list":["post-4026","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\/4026","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=4026"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4026\/revisions"}],"predecessor-version":[{"id":11495,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4026\/revisions\/11495"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4025"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}