{"id":3568,"date":"2025-11-28T00:00:00","date_gmt":"2025-11-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/pcs-pma-pmd-work-together\/"},"modified":"2026-06-22T04:34:01","modified_gmt":"2026-06-22T04:34:01","slug":"pcs-pma-pmd-work-together","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/pcs-pma-pmd-work-together","title":{"rendered":"C\u00e1ch c\u00e1c l\u1edbp PHY Ethernet PCS, PMA v\u00e0 PMD v\u1eadn h\u00e0nh c\u00f9ng nhau"},"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\/d23fa6e6358741de8a06b78eb2e16176.webp\" alt=\"How PCS, PMA, and PMD Work Together\" class=\"wp-image-3564\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d23fa6e6358741de8a06b78eb2e16176.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d23fa6e6358741de8a06b78eb2e16176-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d23fa6e6358741de8a06b78eb2e16176-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d23fa6e6358741de8a06b78eb2e16176-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d23fa6e6358741de8a06b78eb2e16176-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng ngh\u1ec7 Ethernet t\u1ed1c \u0111\u1ed9 cao hi\u1ec7n \u0111\u1ea1i\u201410G, 25G, 40G, 100G v\u00e0 cao h\u01a1n\u2014d\u1ef1a v\u00e0o ki\u1ebfn tr\u00fac ph\u00e2n l\u1edbp \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u c\u00f3 th\u1ec3 di chuy\u1ec3n \u0111\u00e1ng tin c\u1eady t\u1eeb t\u1ea7ng MAC \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn v\u1eadt l\u00fd. Trong s\u1ed1 c\u00e1c t\u1ea7ng n\u00e0y, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pcs-physical-coding-sublayer-ethernet-explained\/\"><strong>PCS (L\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd)<\/strong><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pma-physical-medium-attachment-ethernet-explained\/\"><strong>PMA (B\u1ed9 g\u1eafn ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd)<\/strong><\/a>, and <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-physical-medium-dependent-pmd\/\"><strong>PMD (Ph\u1ee5 thu\u1ed9c v\u00e0o ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd)<\/strong><\/a> h\u00ecnh th\u00e0nh l\u00f5i c\u1ee7a ng\u0103n x\u1ebfp t\u1ea7ng v\u1eadt l\u00fd (PHY).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 c\u00f3 m\u1ed1i li\u00ean h\u1ec7 ch\u1eb7t ch\u1ebd v\u1edbi nhau, m\u1ed7i t\u1ea7ng th\u1ef1c hi\u1ec7n m\u1ed9t ch\u1ee9c n\u0103ng ri\u00eang bi\u1ec7t. Vi\u1ec7c hi\u1ec3u c\u00e1ch ch\u00fang v\u1eadn h\u00e0nh \u0111\u1ed3ng b\u1ed9 l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi k\u1ef9 s\u01b0 m\u1ea1ng, nh\u00e0 thi\u1ebft k\u1ebf module quang v\u00e0 b\u1ea5t k\u1ef3 ai \u0111\u00e1nh gi\u00e1 b\u1ed9 thu ph\u00e1t Ethernet ho\u1eb7c ph\u1ea7n c\u1ee9ng k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Ch\u1ee9c n\u0103ng c\u1ee7a t\u1eebng t\u1ea7ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" ><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pcs-physical-coding-sublayer-ethernet-explained\/\">PCS \u2014 T\u1ea7ng m\u00e3 h\u00f3a v\u1eadt l\u00fd<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PCS x\u1eed l\u00fd <strong>m\u00e3 h\u00f3a d\u1eef li\u1ec7u, c\u0103n ch\u1ec9nh kh\u1ed1i, ph\u00e2n ph\u1ed1i k\u00eanh v\u00e0 ph\u00e1t hi\u1ec7n l\u1ed7i<\/strong>.<br\/>C\u00e1c tr\u00e1ch nhi\u1ec7m ch\u00ednh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 m\u00e3 h\u00f3a (8b\/10b, 64b\/66b, 256b\/257b)<\/p><\/li><li><p>Ph\u00e2n b\u1ed5 k\u00eanh v\u00e0 hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 tr\u1ec5 (\u0111\u1ed1i v\u1edbi Ethernet \u0111a k\u00eanh)<\/p><\/li><li><p>C\u0103n ch\u1ec9nh t\u1eeb v\u00e0 x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi khung<\/p><\/li><li><p>Gi\u00e1m s\u00e1t l\u1ed7i (t\u1ef7 l\u1ec7 l\u1ed7i bit \u2013 BER, l\u1ed7i kh\u1ed1i)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PCS chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u t\u1eeb t\u1ea7ng MAC th\u00e0nh lu\u1ed3ng bit \u0111\u00e3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a<\/strong> ph\u00f9 h\u1ee3p cho vi\u1ec7c tu\u1ea7n t\u1ef1 h\u00f3a t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" ><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pma-physical-medium-attachment-ethernet-explained\/\">PMA \u2014 G\u1eafn k\u1ebft m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMA ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 <strong>tu\u1ea7n t\u1ef1 h\u00f3a\/gi\u1ea3i tu\u1ea7n t\u1ef1 h\u00f3a<\/strong>, <strong>Kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3<\/strong>, and <strong>th\u00edch nghi \u0111i\u1ec7n<\/strong> gi\u1eefa PCS v\u00e0 PMD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a n\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/serdes-interfaces-high-speed-data-transfer-and-signal-integrity\/\"><strong>SerDes<\/strong><\/a> (chuy\u1ec3n \u0111\u1ed5i song song-th\u00e0nh-nh\u1ecb ph\u00e2n v\u00e0 nh\u1ecb ph\u00e2n-th\u00e0nh-song song)<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/clock-and-data-recovery-in-modern-communication-systems\/\"><strong>CDR<\/strong><\/a> (kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3 v\u00e0 d\u1eef li\u1ec7u)<\/p><\/li><li><p>T\u1ea1o lu\u1ed3ng bit t\u1ed1c \u0111\u1ed9 cao \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 truy\u1ec1n \u0111i<\/p><\/li><li><p>K\u1ebft h\u1ee3p nhi\u1ec1u k\u00eanh (v\u00ed d\u1ee5: 4\u00d725G \u2192 100G)<\/p><\/li><li><p>X\u1eed l\u00fd giao di\u1ec7n PHY \u0111i\u1ec7n b\u00ean trong b\u1ed9 thu ph\u00e1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PMA \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u s\u1ea1ch, \u0111\u1ed3ng b\u1ed9 v\u00e0 s\u1eb5n s\u00e0ng \u0111\u1ec3 truy\u1ec1n qua m\u00f4i tr\u01b0\u1eddng.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" ><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-physical-medium-dependent-pmd\/\">PMD \u2014 Ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMD l\u00e0 t\u1ea7ng t\u01b0\u01a1ng t\u00e1c tr\u1ef1c ti\u1ebfp v\u1edbi <strong>m\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn th\u1ef1c t\u1ebf<\/strong>, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1ee3i quang, d\u00e2y \u0111\u1ed3ng, c\u00e1p DAC ho\u1eb7c AOC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PMD bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 ph\u00e1t\/nh\u1eadn quang (v\u00ed d\u1ee5: laser, \u0111i\u1ed1t quang)<\/p><\/li><li><p>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n v\u00e0 khu\u1ebfch \u0111\u1ea1i \u0111i\u1ec7n<\/p><\/li><li><p>L\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng<\/p><\/li><li><p>\u0110i\u1ec1u khi\u1ec3n c\u00f4ng su\u1ea5t ph\u00e1t v\u00e0 \u0111\u1ed9 nh\u1ea1y<\/p><\/li><li><p>C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1eb7c th\u00f9 m\u00f4i tr\u01b0\u1eddng (s\u1ee3i quang OM3\/OM4, c\u1eb7p d\u00e2y \u0111\u1ed3ng 100 \u00f4m, v.v.)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PMD chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb PMA th\u00e0nh t\u00edn hi\u1ec7u quang ho\u1eb7c \u0111\u1ed3ng \u0111\u1ec3 truy\u1ec1n qua li\u00ean k\u1ebft v\u1eadt l\u00fd.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1ch PCS, PMA v\u00e0 PMD ph\u1ed1i h\u1ee3p ho\u1ea1t \u0111\u1ed9ng<\/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\/8f686013e096433f9a02240754eb8dec.webp\" alt=\"PCS, PMA, and PMD Work Together\" class=\"wp-image-3565\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8f686013e096433f9a02240754eb8dec.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8f686013e096433f9a02240754eb8dec-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8f686013e096433f9a02240754eb8dec-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8f686013e096433f9a02240754eb8dec-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8f686013e096433f9a02240754eb8dec-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f2ng d\u1eef li\u1ec7u \u0111i qua ng\u0103n x\u1ebfp PHY tu\u00e2n theo quy tr\u00ecnh n\u00e0y:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 1: PCS m\u00e3 h\u00f3a v\u00e0 t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1eef li\u1ec7u t\u1eeb t\u1ea7ng MAC \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e3 h\u00f3a (64b\/66b ho\u1eb7c c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 kh\u00e1c)<\/p><\/li><li><p>Ph\u00e2n ph\u1ed1i v\u00e0o c\u00e1c k\u00eanh (n\u1ebfu l\u00e0 Ethernet \u0111a k\u00eanh)<\/p><\/li><li><p>C\u0103n ch\u1ec9nh v\u00e0 kh\u00f3a kh\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c n\u00e0y chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u cho qu\u00e1 tr\u00ecnh tu\u1ea7n t\u1ef1 h\u00f3a t\u1ed1c \u0111\u1ed9 cao trong khi v\u1eabn duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 2: PMA chuy\u1ec3n \u0111\u1ed5i v\u00e0 \u0111\u1ed3ng b\u1ed9 h\u00f3a lu\u1ed3ng bit<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMA:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tu\u1ea7n t\u1ef1 h\u00f3a d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1edfi PCS th\u00e0nh lu\u1ed3ng bit li\u00ean t\u1ee5c<\/p><\/li><li><p>Kh\u00f4i ph\u1ee5c th\u1eddi \u0111i\u1ec3m \u0111\u1ed3ng h\u1ed3 t\u1eeb d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o<\/p><\/li><li><p>\u00c1p d\u1ee5ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/serdes-interfaces-high-speed-data-transfer-and-signal-integrity\/\">SerDes<\/a> c\u00e2n b\u1eb1ng v\u00e0 t\u00e1i \u0111\u1ed3ng b\u1ed9<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o gh\u00e9p k\u00eanh cho c\u00e1c giao th\u1ee9c \u0111a k\u00eanh (XLAUI, CAUI-4, v.v.)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c n\u00e0y l\u00e0m \u1ed5n \u0111\u1ecbnh t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi truy\u1ec1n \u0111i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 3: PMD g\u1eedi t\u00edn hi\u1ec7u qua m\u00f4i tr\u01b0\u1eddng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea7ng PMD:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh t\u00edn hi\u1ec7u quang (th\u00f4ng qua laser\/\u0111i\u1ed1t quang)<\/p><\/li><li><p>Ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ea7u ra \u0111i\u1ec7n cho d\u00e2y \u0111\u1ed3ng (BASE-T, DAC)<\/p><\/li><li><p>Ki\u1ec3m so\u00e1t \u0111\u1ecbnh d\u1ea1ng \u0111i\u1ec1u ch\u1ebf (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-non-return-to-zero-in-digital-communication\/\">NRZ<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics\/\">PAM4<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 ph\u00eda nh\u1eadn, PMD \u0111\u1ea3o ng\u01b0\u1ee3c qu\u00e1 tr\u00ecnh n\u00e0y v\u00e0 truy\u1ec1n l\u1ea1i t\u00edn hi\u1ec7u \u0111i\u1ec7n s\u1ea1ch cho PMA.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >V\u00ec sao c\u00e1c t\u1ea7ng n\u00e0y quan tr\u1ecdng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed1i v\u1edbi hi\u1ec7u n\u0103ng b\u1ed9 thu ph\u00e1t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u1ea7ng n\u00e0y x\u00e1c \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u1ed1i \u0111a<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft<\/p><\/li><li><p>Hi\u1ec7u n\u0103ng l\u1ed7i (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">BER<\/a>)<\/p><\/li><li><p>\u0110\u1ed9 Tr\u1ec5<\/p><\/li><li><p>Hi\u1ec7u qu\u1ea3 v\u1ec1 n\u0103ng l\u01b0\u1ee3ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">PMA v\u00e0 PMD \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/488452.htm\"><strong>100G<br><\/strong><\/a><strong>\/<\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\"><strong>200G<\/strong><\/a><strong>\/<\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\"><strong>400G<\/strong><\/a><strong> b\u1ed9 thu ph\u00e1t PAM4<\/strong>, n\u01a1i kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3 v\u00e0 \u0111i\u1ec1u ch\u1ebf quang \u0111\u00f2i h\u1ecfi x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 (DSP) ti\u00ean ti\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed1i v\u1edbi nh\u00e0 t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u r\u00f5 t\u01b0\u01a1ng t\u00e1c gi\u1eefa PCS-PMA-PMD gi\u00fap:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng th\u00edch <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP<\/a>\/<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491483.htm\">C\u00e1c module QSFP<\/a><\/p><\/li><li><p>X\u1eed l\u00fd s\u1ef1 c\u1ed1 li\u00ean k\u1ebft quang<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o \u00e1nh x\u1ea1 k\u00eanh \u0111\u00fang (v\u00ed d\u1ee5: ph\u00e2n nh\u00e1nh \u2013 breakout)<\/p><\/li><li><p>Ch\u1ea9n \u0111o\u00e1n l\u1ed7i m\u00e3 h\u00f3a ho\u1eb7c c\u0103n ch\u1ec9nh<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1ch ph\u1ea7n c\u1ee9ng LINK-PP h\u1ed7 tr\u1ee3 t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a PCS\/PMA\/PMD<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP cung c\u1ea5p c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea3m \u1ee9ng Ethernet, ph\u1ee5 ki\u1ec7n b\u1ed9 thu ph\u00e1t quang v\u00e0 c\u00e1c linh ki\u1ec7n k\u1ebft n\u1ed1i hi\u1ec7u n\u0103ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao ch\u00e8n th\u1ea5p v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u cao (h\u1ed7 tr\u1ee3 hi\u1ec7u n\u0103ng SerDes c\u1ee7a PMA)<\/p><\/li><li><p>\u1ee8ng d\u1ee5ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh c\u1ee7a PCS\/PMA<\/p><\/li><li><p>\u0110\u1eb7c t\u00ednh \u0111i\u1ec7n v\u1eefng ch\u1eafc cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>T\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb m\u1ea1ng h\u00e0ng \u0111\u1ea7u (OEM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111\u1ea7u n\u1ed1i ch\u1ea5t l\u01b0\u1ee3ng cao, c\u1ea3m \u1ee9ng RJ45 v\u00e0 th\u00e0nh ph\u1ea7n quang gi\u00fap duy tr\u00ec <strong>\u0111\u1ed9 r\u00f5 n\u00e9t t\u00edn hi\u1ec7u tr\u00ean to\u00e0n b\u1ed9 c\u00e1c ph\u00e2n t\u1ea7ng PHY<\/strong>, \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady t\u1eeb m\u00e3 h\u00f3a PCS \u0111\u1ebfn truy\u1ec1n d\u1eabn PMD.<\/p>\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\/9240db12025d485c8973a6532e9fb4d7.jpg\" alt=\"LINK-PP Solutions\" class=\"wp-image-3566\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9240db12025d485c8973a6532e9fb4d7.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9240db12025d485c8973a6532e9fb4d7-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9240db12025d485c8973a6532e9fb4d7-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9240db12025d485c8973a6532e9fb4d7-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9240db12025d485c8973a6532e9fb4d7-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PCS, PMA v\u00e0 PMD ph\u1ed1i h\u1ee3p v\u1edbi nhau nh\u01b0 ba t\u1ea7ng \u0111\u1ed3ng b\u1ed9 trong PHY Ethernet<\/strong>, t\u1ea1o th\u00e0nh \u0111\u01b0\u1eddng \u1ed1ng thi\u1ebft y\u1ebfu cho ph\u00e9p d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao truy\u1ec1n \u0111i m\u1ed9t c\u00e1ch s\u1ea1ch s\u1ebd v\u00e0 \u0111\u00e1ng tin c\u1eady tr\u00ean m\u1ea1ng s\u1ee3i quang v\u00e0 \u0111\u1ed3ng.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pcs-physical-coding-sublayer-ethernet-explained\/\">PCS<\/a> x\u1eed l\u00fd <strong>m\u00e3 h\u00f3a v\u00e0 c\u0103n ch\u1ec9nh<\/strong><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pma-physical-medium-attachment-ethernet-explained\/\">PMA<\/a> x\u1eed l\u00fd <strong>tu\u1ea7n t\u1ef1 h\u00f3a v\u00e0 \u0111\u1ed3ng b\u1ed9 th\u1eddi gian<\/strong><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-physical-medium-dependent-pmd\/\">PMD<\/a> x\u1eed l\u00fd <strong>truy\u1ec1n d\u1eabn \u0111\u1eb7c th\u00f9 m\u00f4i tr\u01b0\u1eddng<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u vai tr\u00f2 c\u1ee7a ch\u00fang l\u00e0 n\u1ec1n t\u1ea3ng khi \u0111\u00e1nh gi\u00e1 c\u00e1c module quang t\u1ed1c \u0111\u1ed9 cao, thi\u1ebft k\u1ebf m\u1ea1ng ho\u1eb7c hi\u1ec7u n\u0103ng t\u1ea7ng v\u1eadt l\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa PCS, PMA v\u00e0 PMD trong Ethernet l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PCS (T\u1ea7ng m\u00e3 h\u00f3a v\u1eadt l\u00fd) x\u1eed l\u00fd m\u00e3 h\u00f3a d\u1eef li\u1ec7u, c\u0103n ch\u1ec9nh kh\u1ed1i, ph\u00e2n ph\u1ed1i k\u00eanh v\u00e0 ph\u00e1t hi\u1ec7n l\u1ed7i.<br\/>PMA (G\u1eafn k\u1ebft m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd) th\u1ef1c hi\u1ec7n tu\u1ea7n t\u1ef1 h\u00f3a\/gi\u1ea3i tu\u1ea7n t\u1ef1 h\u00f3a (SerDes) v\u00e0 kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3.<br\/>PMD (Ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd) t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd th\u1ef1c t\u1ebf\u2014ph\u00e1t v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u \u0111i\u1ec7n ho\u1eb7c quang.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao PCS, PMA v\u00e0 PMD c\u1ea7n ph\u1ed1i h\u1ee3p ho\u1ea1t \u0111\u1ed9ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ba l\u1edbp n\u00e0y t\u1ea1o th\u00e0nh to\u00e0n b\u1ed9 quy tr\u00ecnh x\u1eed l\u00fd PHY c\u1ee7a Ethernet. PCS chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u, PMA chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u00e0nh lu\u1ed3ng bit tu\u1ea7n t\u1ef1, v\u00e0 PMD truy\u1ec1n d\u1eef li\u1ec7u qua c\u00e1p \u0111\u1ed3ng ho\u1eb7c c\u00e1p quang. Ch\u1ec9 khi ph\u1ed1i h\u1ee3p v\u1edbi nhau, PHY m\u1edbi c\u00f3 th\u1ec3 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian, t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >Li\u1ec7u m\u1ecdi t\u1ed1c \u0111\u1ed9 Ethernet \u0111\u1ec1u s\u1eed d\u1ee5ng PCS, PMA v\u00e0 PMD?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00fang v\u1eady. D\u00f9 \u1edf b\u1ea5t k\u1ef3 t\u1ed1c \u0111\u1ed9 n\u00e0o\u20141G, 10G, 25G, 100G hay 400G\u2014c\u00e1c kh\u1ed1i ch\u1ee9c n\u0103ng n\u00e0y \u0111\u1ec1u t\u1ed3n t\u1ea1i trong ki\u1ebfn tr\u00fac PHY c\u1ee7a Ethernet. C\u00e1c tri\u1ec3n khai n\u1ed9i b\u1ed9 c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 kh\u00e1c nhau (v\u00ed d\u1ee5: c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 m\u00e3 h\u00f3a kh\u00e1c nhau ho\u1eb7c s\u1ed1 k\u00eanh SerDes), nh\u01b0ng c\u1ea5u tr\u00fac ch\u1ee9c n\u0103ng v\u1eabn lu\u00f4n nh\u1ea5t qu\u00e1n.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >PCS \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u n\u0103ng c\u1ee7a li\u00ean k\u1ebft?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PCS n\u00e2ng cao \u0111\u1ed9 b\u1ec1n v\u1eefng c\u1ee7a li\u00ean k\u1ebft b\u1eb1ng c\u00e1ch:<br\/>\u2022 th\u1ef1c hi\u1ec7n m\u00e3 h\u00f3a kh\u1ed1i (v\u00ed d\u1ee5: 64b\/66b, 256b\/257b)<br\/>\u2022 th\u00eam ti\u00eau \u0111\u1ec1 \u0111\u1ed3ng b\u1ed9 h\u00f3a<br\/>\u2022 h\u1ed7 tr\u1ee3 ph\u00e2n ph\u1ed1i k\u00eanh v\u00e0 hi\u1ec7u ch\u1ec9nh l\u1ec7ch pha gi\u1eefa c\u00e1c k\u00eanh<br\/>\u2022 cung c\u1ea5p ph\u00e1t hi\u1ec7n l\u1ed7i (v\u00ed d\u1ee5: CRC\/FEC)<br\/>C\u00e1c ch\u1ee9c n\u0103ng n\u00e0y gi\u00fap gi\u1ea3m t\u1ef7 l\u1ec7 l\u1ed7i bit v\u00e0 h\u1ed7 tr\u1ee3 vi\u1ec7c truy\u1ec1n d\u1eabn \u0111\u00e1ng tin c\u1eady tr\u00ean kho\u1ea3ng c\u00e1ch xa v\u00e0 \u1edf t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >PMA \u0111\u00f3ng vai tr\u00f2 g\u00ec trong c\u00e1c module thu ph\u00e1t quang?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">C\u00e1c module SFP, SFP+, SFP28, QSFP+ v\u00e0 QSFP28<\/a>, l\u1edbp PMA bao g\u1ed3m c\u00e1c m\u1ea1ch SerDes v\u00e0 ph\u1ee5c h\u1ed3i xung nh\u1ecbp nh\u1eb1m kh\u1edbp c\u00e1c k\u00eanh \u0111i\u1ec7n t\u1eeb ph\u00eda host v\u1edbi c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n quang. N\u00f3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian, s\u1ef1 c\u0103n ch\u1ec9nh gi\u1eefa c\u00e1c k\u00eanh d\u1eef li\u1ec7u v\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i li\u1ec1n m\u1ea1ch gi\u1eefa mi\u1ec1n \u0111i\u1ec7n v\u00e0 mi\u1ec1n quang.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >Li\u1ec7u PMD ch\u1ec9 \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1p quang?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. PMD \u00e1p d\u1ee5ng cho c\u1ea3 c\u00e1p quang v\u00e0 c\u00e1p \u0111\u1ed3ng.<br\/>\u2022 Trong c\u00e1c module thu ph\u00e1t quang, PMD bao g\u1ed3m laser, \u0111i-\u1ed1t quang v\u00e0 m\u1ea1ch \u0111i\u1ec1u ch\u1ebf.<br\/>\u2022 Trong c\u00e1c giao di\u1ec7n c\u00e1p \u0111\u1ed3ng (v\u00ed d\u1ee5: BASE-T), PMD bao g\u1ed3m c\u00e1c ph\u1ea7n t\u1eed \u0111\u1ea7u cu\u1ed1i t\u01b0\u01a1ng t\u1ef1, bi\u1ebfn \u00e1p v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">k\u1ebft n\u1ed1i RJ45<\/a>.<br\/>Nhi\u1ec7m v\u1ee5 c\u1ee7a n\u00f3 lu\u00f4n l\u00e0 gh\u00e9p t\u00edn hi\u1ec7u PHY v\u00e0o m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c l\u1edbp n\u00e0y \u1ea3nh h\u01b0\u1edfng ra sao \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a module?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c, vi\u1ec7c m\u00e3 h\u00f3a c\u1ee7a PCS, h\u00e0nh vi SerDes c\u1ee7a PMA v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quang\/\u0111i\u1ec7n c\u1ee7a PMD ph\u1ea3i tu\u00e2n theo <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">UL, RoHS, REACH<\/a>. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c module thu ph\u00e1t\u2014even t\u1eeb c\u00e1c th\u01b0\u01a1ng hi\u1ec7u kh\u00e1c nhau\u2014c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng li\u1ec1n m\u1ea1ch v\u1edbi c\u00e1c switch, router v\u00e0 card m\u1ea1ng (NIC), mi\u1ec5n l\u00e0 ch\u00fang tu\u00e2n th\u1ee7 c\u00f9ng m\u1ed9t ti\u00eau chu\u1ea9n.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch PCS, PMA v\u00e0 PMD ph\u1ed1i h\u1ee3p b\u00ean trong PHY Ethernet, cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao \u0111\u00e1ng tin c\u1eady tr\u00ean c\u00e1c m\u1ea1ng s\u1ee3i quang v\u00e0 \u0111\u1ed3ng.<\/p>","protected":false},"author":1,"featured_media":3567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,24,26],"class_list":["post-3568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3568","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=3568"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3568\/revisions"}],"predecessor-version":[{"id":10824,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3568\/revisions\/10824"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3567"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}