{"id":4699,"date":"2025-10-16T11:12:00","date_gmt":"2025-10-16T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/rj45-connectors-guide-types-specs-link-pp\/"},"modified":"2026-06-22T09:02:27","modified_gmt":"2026-06-22T09:02:27","slug":"rj45-connectors-guide-types-specs-link-pp","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/rj45-connectors-guide-types-specs-link-pp","title":{"rendered":"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 \u0111\u1ea7u n\u1ed1i RJ45 \u2014 C\u00e1c lo\u1ea1i, hi\u1ec7u n\u0103ng v\u00e0 c\u00e1ch ch\u1ecdn \u0111\u1ea7u n\u1ed1i ph\u00f9 h\u1ee3p"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

RJ45 l\u00e0 g\u00ec?<\/h2>\n\n\n\n

M\u1ed9t B\u1ed9 n\u1ed1i RJ45<\/strong> l\u00e0 m\u1ed9t giao di\u1ec7n ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu cho m\u1ea1ng Ethernet. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1ea7u n\u1ed1i m\u00f4-\u0111un 8 v\u1ecb tr\u00ed, 8 ti\u1ebfp \u0111i\u1ec3m (<\/strong>8P8C<\/strong><\/a>)<\/strong> ) k\u1ebft th\u00fac c\u00e1p \u0111\u1ed3ng xo\u1eafn nh\u01b0 Cat5e, Cat6 ho\u1eb7c Cat6A. C\u00e1c \u0111\u1ea7u n\u1ed1i n\u00e0y t\u1ea1o th\u00e0nh li\u00ean k\u1ebft v\u1eadt l\u00fd gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng\u2014m\u00e1y t\u00ednh, b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 camera IP\u2014cho ph\u00e9p truy\u1ec1n th\u00f4ng d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n

Ch\u1eef \u201cRJ\u201d trong RJ45 vi\u1ebft t\u1eaft c\u1ee7a \u201cJack \u0111\u00e3 \u0111\u0103ng k\u00fd<\/strong>,\u201d, ban \u0111\u1ea7u do \u1ee6y ban Truy\u1ec1n th\u00f4ng Li\u00ean bang Hoa K\u1ef3 (FCC) quy \u0111\u1ecbnh. Theo th\u1eddi gian, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh \u0111\u1ea7u n\u1ed1i ph\u1ed5 bi\u1ebfn cho c\u00e1c \u1ee9ng d\u1ee5ng m\u1ea1ng c\u1ee5c b\u1ed9 Ethernet (LAN)<\/strong> tr\u00ean to\u00e0n ng\u00e0nh.<\/p>\n\n\n\n

C\u1ea5u tr\u00fac v\u00e0 s\u01a1 \u0111\u1ed3 ch\u00e2n c\u1ee7a \u0111\u1ea7u n\u1ed1i RJ45<\/h2>\n\n\n\n

M\u1ed7i \u0111\u1ea7u n\u1ed1i RJ45 ch\u1ee9a t\u00e1m ti\u1ebfp \u0111i\u1ec3m m\u1ea1 v\u00e0ng<\/strong> \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. C\u1ea5u h\u00ecnh ch\u00e2n<\/strong> tu\u00e2n theo m\u1ed9t trong hai ti\u00eau chu\u1ea9n \u0111i d\u00e2y T568A ho\u1eb7c T568B<\/strong>, quy \u0111\u1ecbnh c\u00e1ch c\u00e1c s\u1ee3i d\u00e2y m\u00e3 m\u00e0u \u0111\u01b0\u1ee3c \u0111\u1ea5u v\u00e0o b\u00ean trong \u0111\u1ea7u n\u1ed1i.<\/p>\n\n\n\n

\"T568A<\/figure>\n\n\n\n
\n\n<\/colgroup>

S\u1ed1 ch\u00e2n<\/p><\/th>

M\u00e0u d\u00e2y (T568B)<\/p><\/th>

Ch\u1ee9c n\u0103ng<\/p><\/th><\/tr>

1<\/p><\/td>

Tr\u1eafng\/Cam<\/p><\/td>

Truy\u1ec1n ph\u00e1t + (TX+)<\/p><\/td><\/tr>

2<\/p><\/td>

Cam<\/p><\/td>

Truy\u1ec1n ph\u00e1t \u2013 (TX\u2013)<\/p><\/td><\/tr>

3<\/p><\/td>

Tr\u1eafng\/Xanh l\u00e1<\/p><\/td>

Nh\u1eadn + (RX+)<\/p><\/td><\/tr>

6<\/p><\/td>

Xanh l\u00e1<\/p><\/td>

Nh\u1eadn \u2013 (RX\u2013)<\/p><\/td><\/tr>

4,5,7,8<\/p><\/td>

Xanh d\u01b0\u01a1ng, Tr\u1eafng\/Xanh d\u01b0\u01a1ng, N\u00e2u, Tr\u1eafng\/N\u00e2u<\/p><\/td>

D\u00f9ng cho PoE ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng d\u1ef1 ph\u00f2ng (<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

For c\u00f4ng ngh\u1ec7 Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong> IEEE 802.3af \/ 802.3at \/ 802.3bt), c\u00e1c ch\u00e2n b\u1ed5 sung truy\u1ec1n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) c\u00f9ng t\u00edn hi\u1ec7u d\u1eef li\u1ec7u, cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb nh\u01b0<\/a>\u0111i\u1ec7n tho\u1ea1i VoIP, , v\u00e0 \u0111i\u1ec3m truy c\u1eadp, <\/strong>Camera IP<\/strong><\/a>, ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n ngu\u1ed3n c\u1ea5p ngo\u00e0i.<\/strong> C\u00e1c lo\u1ea1i \u0111\u1ea7u n\u1ed1i RJ45.<\/p>\n\n\n\n

\u0110\u1ea7u n\u1ed1i RJ45 c\u00f3 nhi\u1ec1u ki\u1ec3u d\u00e1ng v\u00e0 v\u1eadt li\u1ec7u kh\u00e1c nhau \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng v\u00e0 t\u1ed1c \u0111\u1ed9 m\u1ea1ng kh\u00e1c nhau:<\/h2>\n\n\n\n

a.<\/p>\n\n\n\n

C\u00f3 v\u1ecf b\u1ecdc ch\u1eafn nhi\u1ec5u so v\u1edbi kh\u00f4ng c\u00f3 v\u1ecf b\u1ecdc ch\u1eafn nhi\u1ec5u. (STP so v\u1edbi UTP)<\/a> \u0110\u1ea7u n\u1ed1i RJ45 c\u00f3 v\u1ecf b\u1ecdc ch\u1eafn nhi\u1ec5u (STP)<\/h3>\n\n\n\n