{"id":4001,"date":"2025-10-13T11:12:00","date_gmt":"2025-10-13T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/poe-pse-power-sourcing-equipment-guide\/"},"modified":"2026-06-22T06:23:51","modified_gmt":"2026-06-22T06:23:51","slug":"poe-pse-power-sourcing-equipment-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/poe-pse-power-sourcing-equipment-guide","title":{"rendered":"Thi\u1ebft b\u1ecb C\u1ea5p Ngu\u1ed3n (PSE) trong M\u1ea1ng PoE L\u00e0 G\u00ec?"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

Thi\u1ebft b\u1ecb cung c\u1ea5p \u0111i\u1ec7n (PSE)<\/strong> l\u00e0 thi\u1ebft b\u1ecb cung c\u1ea5p \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) qua c\u00e1p Ethernet cho m\u1ed9t Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/strong> trong h\u1ec7 sinh th\u00e1i IEEE 802.3 c\u00f4ng ngh\u1ec7 Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong><\/a> H\u1ec7 sinh th\u00e1i. N\u00f3i c\u00e1ch kh\u00e1c, PSE<\/strong> l\u00e0 ph\u00eda cung c\u1ea5p \u0111i\u1ec7n PoE (b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c b\u1ed9 ti\u00eam \u0111i\u1ec7n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng), v\u00e0 Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/strong> l\u00e0 thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (v\u00ed d\u1ee5: camera IP ho\u1eb7c \u0111i\u1ec3m truy c\u1eadp). <\/p>\n\n\n\n

Thi\u1ebft b\u1ecb cung c\u1ea5p \u0111i\u1ec7n (PSE)<\/strong> l\u00e0 ph\u00eda cung c\u1ea5p \u0111i\u1ec7n c\u1ee7a m\u1ed9t c\u00f4ng ngh\u1ec7 Cung c\u1ea5p \u0111i\u1ec7n qua Ethernet (PoE)<\/strong> h\u1ec7 th\u1ed1ng. N\u00f3 truy\u1ec1n \u0111\u1ed3ng th\u1eddi \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) v\u00e0 d\u1eef li\u1ec7u qua c\u00e1p Ethernet ti\u00eau chu\u1ea9n\u2014th\u01b0\u1eddng th\u00f4ng qua B\u1ed9 n\u1ed1i RJ45<\/strong><\/a>. C\u00f4ng ngh\u1ec7 n\u00e0y lo\u1ea1i b\u1ecf nhu c\u1ea7u v\u1ec1 c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n ri\u00eang bi\u1ec7t, \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u00e0 gi\u1ea3m chi ph\u00ed trong c\u00e1c \u1ee9ng d\u1ee5ng doanh nghi\u1ec7p, c\u00f4ng nghi\u1ec7p v\u00e0 IoT.<\/p>\n\n\n\n

Trong m\u1ed9t c\u1ea5u h\u00ecnh PoE (Power over Ethernet), thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n (PSE \u2013 Power Sourcing Equipment) truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng \u0111\u1ebfn m\u1ed9t Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n (PD)<\/strong>\u2014v\u00ed d\u1ee5 nh\u01b0 camera IP, \u0111i\u1ec3m truy c\u1eadp kh\u00f4ng d\u00e2y (WAP) ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i VoIP\u2014th\u00f4ng qua c\u00f9ng m\u1ed9t c\u00e1p m\u1ea1ng d\u00f9ng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n

ch\u1ea5t l\u01b0\u1ee3ng cao, t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u1ea3 \u1ee9ng d\u1ee5ng Ethernet v\u00e0 OTN. <\/strong>\u0110\u1ecbnh ngh\u0129a PSE<\/h2>\n\n\n\n

A PSE (Thi\u1ebft b\u1ecb C\u1ea5p ngu\u1ed3n)<\/strong> l\u00e0 b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb m\u1ea1ng n\u00e0o c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n qua c\u00e1p Ethernet cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (PD) h\u1ed7 tr\u1ee3 ch\u1ee9c n\u0103ng PoE. N\u00f3 ti\u00eam n\u0103ng l\u01b0\u1ee3ng v\u00e0o c\u00e1c c\u1eb7p d\u00e2y xo\u1eafn c\u1ee7a c\u00e1p Ethernet trong khi v\u1eabn \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a truy\u1ec1n th\u00f4ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n

N\u00f3i c\u00e1ch kh\u00e1c, PSE l\u00e0 \u201cb\u00ean cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng\u201d, c\u00f2n PD l\u00e0 \u201cb\u00ean nh\u1eadn n\u0103ng l\u01b0\u1ee3ng\u201d.\u201d<\/p>\n\n\n\n

ch\u1ea5t l\u01b0\u1ee3ng cao, t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u1ea3 \u1ee9ng d\u1ee5ng Ethernet v\u00e0 OTN. <\/strong>C\u00e1c lo\u1ea1i PSE<\/h2>\n\n\n\n

C\u00f3 hai lo\u1ea1i thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n (Power Sourcing Equipment) ch\u00ednh, t\u00f9y thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed c\u1ee7a ch\u00fang trong m\u1ea1ng:<\/p>\n\n\n\n

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

Lo\u1ea1i<\/strong><\/p><\/th>

C\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec3n h\u00ecnh<\/strong><\/p><\/th>

C\u00e1c t\u00ednh n\u0103ng n\u1ed5i b\u1eadt<\/strong><\/p><\/th><\/tr>

Endspan PSE<\/strong><\/p><\/td>

B\u1ed9 chuy\u1ec3n m\u1ea1ch PoE<\/p><\/td>

Cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng v\u00e0 d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e1c c\u1ed5ng Ethernet\u2014kh\u00f4ng c\u1ea7n b\u1ed9 ti\u00eam \u0111i\u1ec7n b\u1ed5 sung.<\/p><\/td><\/tr>

Midspan PSE<\/strong><\/p><\/td>

PoE Injector<\/p><\/td>

\u0110\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t gi\u1eefa m\u1ed9t b\u1ed9 chuy\u1ec3n m\u1ea1ch kh\u00f4ng h\u1ed7 tr\u1ee3 PoE v\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (PD); ch\u1ec9 cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng, kh\u00f4ng truy\u1ec1n d\u1eef li\u1ec7u.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 m\u1edf r\u1ed9ng kh\u1ea3 n\u0103ng PoE t\u1edbi nhi\u1ec1u lo\u1ea1i c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng, t\u1eeb c\u00e1c h\u1ec7 th\u1ed1ng k\u1ebf th\u1eeba \u0111\u1ebfn c\u00e1c tri\u1ec3n khai doanh nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n

ch\u1ea5t l\u01b0\u1ee3ng cao, t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u1ea3 \u1ee9ng d\u1ee5ng Ethernet v\u00e0 OTN. <\/strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a PSE<\/h2>\n\n\n\n

M\u1ed9t PSE ho\u1ea1t \u0111\u1ed9ng qua nhi\u1ec1u giai \u0111o\u1ea1n ch\u00ednh x\u00e1c nh\u1eb1m \u0111\u1ea3m b\u1ea3o vi\u1ec7c cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady:<\/p>\n\n\n\n

    \n

  1. Ph\u00e1t hi\u1ec7n<\/strong> \u2013 Nh\u1eadn d\u1ea1ng xem thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i c\u00f3 ph\u1ea3i l\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (PD) t\u01b0\u01a1ng th\u00edch v\u1edbi PoE hay kh\u00f4ng.<\/p><\/li>

  2. Ph\u00e2n l\u1edbp<\/strong> \u2013 X\u00e1c \u0111\u1ecbnh l\u1edbp c\u00f4ng su\u1ea5t c\u1ee7a PD (v\u00ed d\u1ee5: L\u1edbp 0\u20138).<\/p><\/li>

  3. Truy\u1ec1n t\u1ea3i n\u0103ng l\u01b0\u1ee3ng<\/strong> \u2013 Ti\u00eam \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) qua c\u00e1c c\u1eb7p d\u00e2y theo ch\u1ebf \u0111\u1ed9 A ho\u1eb7c ch\u1ebf \u0111\u1ed9 B.<\/p><\/li>

  4. B\u1ea3o tr\u00ec<\/strong> \u2013 Gi\u00e1m s\u00e1t d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p><\/li>

  5. Ng\u1eaft k\u1ebft n\u1ed1i<\/strong> \u2013 T\u1ef1 \u0111\u1ed9ng ng\u1eaft ngu\u1ed3n khi PD b\u1ecb th\u00e1o r\u1eddi ho\u1eb7c ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1.<\/p><\/li>\n<\/ol>\n\n\n\n

    Quy tr\u00ecnh th\u00f4ng minh n\u00e0y \u0111\u1ea3m b\u1ea3o c\u1ea3 an to\u00e0n thi\u1ebft b\u1ecb l\u1eabn \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n

    ch\u1ea5t l\u01b0\u1ee3ng cao, t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u1ea3 \u1ee9ng d\u1ee5ng Ethernet v\u00e0 OTN. <\/strong>PSE v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n PoE c\u1ee7a IEEE<\/h2>\n\n\n\n

    C\u00e1c ti\u00eau chu\u1ea9n IEEE quy \u0111\u1ecbnh m\u1ee9c c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb PSE. M\u1ed7i phi\u00ean b\u1ea3n m\u1edf r\u1ed9ng ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t s\u1eb5n c\u00f3 v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch thi\u1ebft b\u1ecb:<\/p>\n\n\n\n

    \n\n<\/colgroup>

    Ti\u00eau chu\u1ea9n PoE<\/strong><\/p><\/th>

    C\u00f4ng su\u1ea5t t\u1ed1i \u0111a (t\u1ea1i PSE)<\/strong><\/p><\/th>

    C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/strong><\/p><\/th><\/tr>

    IEEE 802.3af (PoE)<\/strong><\/a><\/p><\/td>

    15,4 W<\/p><\/td>

    \u0110i\u1ec7n tho\u1ea1i IP, \u0111i\u1ec3m truy c\u1eadp c\u1ea5p nh\u1eadp m\u00f4n v\u00e0 camera<\/p><\/td><\/tr>

    IEEE 802.3at (PoE+)<\/strong><\/a><\/p><\/td>

    30 W<\/p><\/td>

    \u0110i\u1ec3m truy c\u1eadp b\u0103ng t\u1ea7n k\u00e9p, thi\u1ebft b\u1ecb video<\/p><\/td><\/tr>

    IEEE 802.3bt (PoE++)<\/strong><\/a><\/p><\/td>

    60 W (Lo\u1ea1i 3) \/ 90\u2013100 W (Lo\u1ea1i 4)<\/p><\/td>

    C\u1ed5ng k\u1ebft n\u1ed1i c\u00f4ng nghi\u1ec7p, \u0111i\u1ec3m truy c\u1eadp c\u00f4ng su\u1ea5t cao, m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

    Khi c\u00e1c ti\u00eau chu\u1ea9n PoE ti\u1ebfn h\u00f3a, c\u00f4ng ngh\u1ec7 PSE ti\u1ebfp t\u1ee5c cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng t\u1ed1t h\u01a1n.<\/p>\n\n\n\n

    \"Common<\/figure>\n\n\n\n

    ch\u1ea5t l\u01b0\u1ee3ng cao, t\u01b0\u01a1ng th\u00edch v\u00e0 \u0111\u00e1ng tin c\u1eady cho c\u1ea3 \u1ee9ng d\u1ee5ng Ethernet v\u00e0 OTN. <\/strong>\u1ee8ng d\u1ee5ng c\u1ee7a PSE<\/h2>\n\n\n\n

    Thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n (Power Sourcing Equipment) \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i:<\/p>\n\n\n\n