{"id":3573,"date":"2025-11-28T00:00:00","date_gmt":"2025-11-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/pcs-physical-coding-sublayer-ethernet-explained\/"},"modified":"2026-06-22T04:32:57","modified_gmt":"2026-06-22T04:32:57","slug":"pcs-physical-coding-sublayer-ethernet-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pcs-physical-coding-sublayer-ethernet-explained","title":{"rendered":"PCS (L\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd): T\u1ed5ng quan k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7"},"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\/34f3d7140a36402fbca20e242d392164.webp\" alt=\"What Is the PCS in Ethernet?\" class=\"wp-image-3569\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/34f3d7140a36402fbca20e242d392164.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/34f3d7140a36402fbca20e242d392164-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/34f3d7140a36402fbca20e242d392164-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/34f3d7140a36402fbca20e242d392164-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/34f3d7140a36402fbca20e242d392164-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Ti\u1ec3u l\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd (Physical Coding Sublayer \u2013 PCS)<\/strong> l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a Ethernet <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-phy-physical-layer-basics-explained\/\"><strong>T\u1ea7ng V\u1eadt l\u00fd (PHY)<\/strong><\/a>, n\u1eb1m gi\u1eefa <strong>L\u1edbp \u0110i\u1ec1u h\u00f2a (RS)<\/strong> v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/pma-physical-medium-attachment-ethernet-explained\/\"><strong>G\u1eafn k\u1ebft M\u00f4i tr\u01b0\u1eddng V\u1eadt l\u00fd (PMA)<\/strong><\/a>. Tr\u00e1ch nhi\u1ec7m c\u1ed1t l\u00f5i c\u1ee7a n\u00f3 l\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u s\u1ed1 th\u00e0nh \u0111\u1ecbnh d\u1ea1ng c\u00f3 th\u1ec3 truy\u1ec1n t\u1ea3i \u0111\u00e1ng tin c\u1eady qua ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ed3ng ho\u1eb7c quang\u2014ngay c\u1ea3 \u1edf t\u1ed1c \u0111\u1ed9 c\u1ef1c cao nh\u01b0 10G, 25G, 40G, 100G v\u00e0 cao h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbp M\u00e3 h\u00f3a V\u1eadt l\u00fd (PCS) \u0111\u00e3 ph\u00e1t tri\u1ec3n \u0111\u00e1ng k\u1ec3 th\u00f4ng qua <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">IEEE 802.3<\/a> c\u00e1c s\u1eeda \u0111\u1ed5i, h\u1ed7 tr\u1ee3 c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 m\u00e3 h\u00f3a ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p nh\u1eb1m \u0111\u1ea3m b\u1ea3o \u0111\u1ed3ng b\u1ed9 h\u00f3a, ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 hi\u1ec7u qu\u1ea3 truy\u1ec1n d\u1eabn tr\u00ean c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f L\u1edbp M\u00e3 h\u00f3a V\u1eadt l\u00fd (PCS) trong Ethernet l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>L\u1edbp M\u00e3 h\u00f3a V\u1eadt l\u00fd<\/strong> x\u00e1c \u0111\u1ecbnh c\u00e1c c\u01a1 ch\u1ebf m\u00e3 h\u00f3a, gi\u1ea3i m\u00e3, c\u0103n ch\u1ec9nh v\u00e0 \u0111i\u1ec1u khi\u1ec3n c\u1ea7n thi\u1ebft tr\u01b0\u1edbc khi t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c tu\u1ea7n t\u1ef1 h\u00f3a v\u00e0 g\u1eedi t\u1edbi L\u1edbp \u0110i\u1ec1u h\u1ee3p V\u1eadt l\u00fd (PMA). N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u nh\u1ecb ph\u00e2n t\u1eeb c\u00e1c t\u1ea7ng tr\u00ean \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac \u0111\u00fang c\u00e1ch cho m\u00f4i tr\u01b0\u1eddng \u0111i\u1ec7n ho\u1eb7c quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, PCS chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u \u0111\u1ec3 v\u1eadn chuy\u1ec3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f C\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a PCS<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00e3 h\u00f3a \u0111\u01b0\u1eddng d\u00e2y v\u00e0 m\u00e3 h\u00f3a kh\u1ed1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PCS tri\u1ec3n khai c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 m\u00e3 h\u00f3a c\u1ee5 th\u1ec3 t\u00f9y theo th\u1ebf h\u1ec7 Ethernet:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>8B\/10B<\/strong> m\u00e3 h\u00f3a cho Ethernet Gigabit \u0111\u1ea7u ti\u00ean<\/p><\/li><li><p><strong>64B\/66B<\/strong> m\u00e3 h\u00f3a cho Ethernet 10G\/25G\/40G\/100G<\/p><\/li><li><p><strong>256B\/257B<\/strong> m\u00e3 h\u00f3a cho c\u00e1c ki\u1ebfn tr\u00fac n\u00e2ng cao nh\u01b0 200G\/400G<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c kh\u1ed1i m\u00e3 h\u00f3a n\u00e0y \u0111\u1ea3m b\u1ea3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ee7 c\u00e1c chuy\u1ec3n ti\u1ebfp t\u00edn hi\u1ec7u \u0111\u1ec3 kh\u00f4i ph\u1ee5c \u0111\u1ed3ng h\u1ed3<\/p><\/li><li><p>\u0110\u1eb7c t\u00ednh DC c\u00e2n b\u1eb1ng<\/p><\/li><li><p>Ch\u00e8n k\u00fd hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n l\u1ed7i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>64B\/66B<\/strong> l\u00e0 l\u01b0\u1ee3c \u0111\u1ed3 th\u1ed1ng tr\u1ecb trong quang h\u1ecdc t\u1ed1c \u0111\u1ed9 cao nh\u1edd m\u1ee9c \u0111\u1ed9 d\u01b0 th\u1eeba th\u1ea5p v\u00e0 hi\u1ec7u su\u1ea5t cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed3ng b\u1ed9 h\u00f3a &amp; C\u1edd c\u0103n ch\u1ec9nh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft t\u1ed1c \u0111\u1ed9 cao y\u00eau c\u1ea7u b\u1ed9 thu duy tr\u00ec s\u1ef1 c\u0103n ch\u1ec9nh bit v\u00e0 khung.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PCS cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed3ng b\u1ed9 h\u00f3a kh\u1ed1i<\/p><\/li><li><p>C\u1edd c\u0103n ch\u1ec9nh (\u0111\u1eb7c bi\u1ec7t cho c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec1u k\u00eanh nh\u01b0 40GBASE-R, 100GBASE-R)<\/p><\/li><li><p>Hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 tr\u1ec5 gi\u1eefa c\u00e1c k\u00eanh quang song song<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng c\u00f3 logic c\u0103n ch\u1ec9nh c\u1ee7a PCS, Ethernet nhi\u1ec1u k\u00eanh s\u1ebd kh\u00f4ng th\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u x\u00e1c \u0111\u1ecbnh v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 \u0111i\u1ec1u khi\u1ec3n tr\u1ea1ng th\u00e1i ch\u1edd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1edbp PCS th\u00eam c\u1ea5u tr\u00fac cho ph\u00e9p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra l\u1ed7i th\u00f4ng qua t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a kh\u1ed1i<\/p><\/li><li><p>Ch\u00e8n tr\u1ea1ng th\u00e1i ch\u1edd \u0111\u1ec3 qu\u1ea3n l\u00fd li\u00ean k\u1ebft<\/p><\/li><li><p>T\u1eadp h\u1ee3p th\u1ee9 t\u1ef1 cho th\u01b0\u01a1ng l\u01b0\u1ee3ng li\u00ean k\u1ebft (v\u00ed d\u1ee5: \u201cL\u1ed7i c\u1ee5c b\u1ed9\u201d, \u201cL\u1ed7i t\u1eeb xa\u201d)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, PCS kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u\u2014m\u00e0 c\u00f2n h\u1ed7 tr\u1ee3 gi\u00e1m s\u00e1t t\u00ecnh tr\u1ea1ng li\u00ean k\u1ebft.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361.jpg\" alt=\"PCS (Physical Coding Sublayer)\" class=\"wp-image-3570\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361-300x300.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361-150x150.jpg 150w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361-768x768.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aa1a7d937f634330be77e395e37df361-12x12.jpg 12w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f PCS so v\u1edbi PMA so v\u1edbi PMD \u2014 C\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ed5ng quan PCS \u2192 PMA \u2192 PMD<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 355px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"355\"><p>L\u1edbp<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"355\"><p><strong>PCS\uff08L\u1edbp M\u00e3 h\u00f3a V\u1eadt l\u00fd\uff09<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e3 h\u00f3a, c\u0103n ch\u1ec9nh, ph\u00e2n ph\u1ed1i k\u00eanh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"355\"><p><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><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tu\u1ea7n t\u1ef1 h\u00f3a\/gi\u1ea3i tu\u1ea7n t\u1ef1 h\u00f3a, l\u00e0m nhi\u1ec5u<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"355\"><p><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><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng ti\u1ec7n quang\/\u0111i\u1ec7n, b\u01b0\u1edbc s\u00f3ng v\u00e0 \u0111i\u1ec1u ch\u1ebf<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">PCS chu\u1ea9n b\u1ecb c\u00e1c kh\u1ed1i s\u1ed1.<br\/>PMA tu\u1ea7n t\u1ef1 h\u00f3a c\u00e1c bit.<br\/>PMD t\u01b0\u01a1ng t\u00e1c v\u1edbi ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1ee3i quang, \u0111\u1ed3ng ho\u1eb7c m\u1eb7t ph\u1eb3ng n\u1ed1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f T\u1ea1i sao PCS quan tr\u1ecdng trong c\u00e1c b\u1ed9 thu ph\u00e1t quang hi\u1ec7n \u0111\u1ea1i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un quang t\u1ed1c \u0111\u1ed9 cao\u2014nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476909.htm\"><strong>SFP+<\/strong><\/a><strong>, <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491606.htm\"><strong>SFP28<\/strong><\/a><strong>, <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491483.htm\"><strong>QSFP+<\/strong><\/a><strong>, <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/488452.htm\"><strong>QSFP28<br><\/strong><\/a><strong>, <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\"><strong>QSFP56<\/strong><\/a>\u2014ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng PCS \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 thi\u1ebft b\u1ecb trung t\u00e2m d\u1eef li\u1ec7u.<\/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\/6af2399d28934f05bddfa8639d9fd6d5.webp\" alt=\"SFP+, SFP28, QSFP+, QSFP28, QSFP56 optical modules\" class=\"wp-image-3571\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6af2399d28934f05bddfa8639d9fd6d5.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6af2399d28934f05bddfa8639d9fd6d5-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6af2399d28934f05bddfa8639d9fd6d5-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6af2399d28934f05bddfa8639d9fd6d5-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6af2399d28934f05bddfa8639d9fd6d5-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u00fd do ch\u00ednh khi\u1ebfn PCS thi\u1ebft y\u1ebfu trong b\u1ed9 thu ph\u00e1t quang:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 tr\u1ec5 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">BER (T\u1ef7 l\u1ec7 l\u1ed7i bit)<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 h\u00f3a kh\u1ed1i hi\u1ec7u qu\u1ea3 v\u00e0 c\u0103n ch\u1ec9nh gi\u1ea3m thi\u1ec3u l\u1ed7i truy\u1ec1n d\u1eabn v\u00e0 t\u0103ng \u0111\u1ed9 tin c\u1eady li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >H\u1ed7 tr\u1ee3 ki\u1ebfn tr\u00fac nhi\u1ec1u k\u00eanh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">40GBASE-R v\u00e0 100GBASE-R ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o logic ph\u00e2n lu\u1ed3ng v\u00e0 hi\u1ec7u ch\u1ec9nh \u0111\u1ed9 tr\u1ec5 k\u00eanh c\u1ee7a PCS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Cho ph\u00e9p m\u1eadt \u0111\u1ed9 c\u1ed5ng cao h\u01a1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7u qu\u1ea3 m\u00e3 h\u00f3a (v\u00ed d\u1ee5: 64B\/66B) gi\u1ea3m thi\u1ec3u \u0111\u1ed9 d\u01b0 th\u1eeba, cho ph\u00e9p nhi\u1ec1u b\u0103ng th\u00f4ng h\u01a1n tr\u00ean m\u1ed7i k\u00eanh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1c s\u1ea3n ph\u1ea9m LI\u00caN K\u1ebeT-PP li\u00ean quan<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP cung c\u1ea5p m\u1ed9t lo\u1ea1t r\u1ed9ng r\u00e3i c\u00e1c<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">b\u1ed9 thu ph\u00e1t quang<\/a> ho\u1ea1t \u0111\u1ed9ng theo c\u00e1c ti\u00eau chu\u1ea9n Ethernet d\u1ef1a tr\u00ean PCS c\u1ee7a IEEE, bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\"><strong>M\u00f4-\u0111un SFP+ 10G<\/strong><\/a><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\"><strong>B\u1ed9 thu ph\u00e1t SFP28 25G<\/strong><\/a><\/p><\/li><li><p><strong>40G\/100G <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/491483.htm\"><strong>QSFP+<\/strong><\/a><strong> \/ <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/488452.htm\"><strong>M\u00f4-\u0111un QSFP28<\/strong><\/a><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476909.htm\"><strong>B\u1ed9 thu ph\u00e1t quang d\u00e0nh cho c\u00f4ng nghi\u1ec7p<\/strong><\/a><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch, hi\u1ec7u su\u1ea5t BER th\u1ea5p v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh tr\u00ean c\u00e1c PHY Ethernet d\u1ef1a tr\u00ean PCS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f PCS trong c\u00e1c ti\u00eau chu\u1ea9n Ethernet kh\u00e1c nhau<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 PCS trong Ethernet 10 Gigabit (10GBASE-R)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>chuy\u1ec3n m\u1ea1ch ch\u1ecdn l\u1ecdc b\u01b0\u1edbc s\u00f3ng d\u1ef1a tr\u00ean WSS <strong>64B\/66B<\/strong> m\u00e3 h\u00f3a<\/p><\/li><li><p>X\u00e1c \u0111\u1ecbnh kh\u00f3a kh\u1ed1i v\u00e0 ph\u00e1t hi\u1ec7n c\u1edd \u0111\u00e1nh d\u1ea5u<\/p><\/li><li><p>T\u1ed1i \u01b0u h\u00f3a cho truy\u1ec1n d\u1eabn quang kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 PCS trong Ethernet 25G (25GBASE-R)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1eef nguy\u00ean 64B\/66B<\/p><\/li><li><p>Th\u00eam t\u00edch h\u1ee3p FEC (S\u1eeda l\u1ed7i ti\u1ebfn) c\u1ea3i ti\u1ebfn<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 PCS trong Ethernet 40G\/100G (40GBASE-R \/ 100GBASE-R)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1edbi thi\u1ec7u gh\u00e9p k\u00eanh k\u00eanh v\u1edbi c\u1edd c\u0103n ch\u1ec9nh<\/p><\/li><li><p>Thi\u1ebft y\u1ebfu \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh tr\u00ean c\u00e1c k\u00eanh s\u1ee3i quang song song<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 PCS trong c\u00e1c ki\u1ebfn tr\u00fac v\u01b0\u1ee3t 100G<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c n\u00e2ng c\u1ea5p IEEE 802.3bs v\u00e0 802.3cd gi\u1edbi thi\u1ec7u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u00edch th\u01b0\u1edbc kh\u1ed1i l\u1edbn h\u01a1n<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics\/\">\u0110i\u1ec1u ch\u1ebf PAM4<\/a> (x\u1eed l\u00fd t\u1ea1i PMA\/PMD nh\u01b0ng ph\u1ed1i h\u1ee3p v\u1edbi PCS)<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f C\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 PCS \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25cf Trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u1ea1ng spine-leaf c\u00f3 th\u00f4ng l\u01b0\u1ee3ng cao d\u1ef1a v\u00e0o PCS \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o giao ti\u1ebfp kh\u00f4ng m\u1ea5t m\u00e1t gi\u1eefa c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25cf M\u1ea1ng Ethernet nh\u00e0 cung c\u1ea5p &amp; \u0111\u00f4 th\u1ecb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PCS gi\u00fap duy tr\u00ec \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u tr\u00ean c\u00e1c li\u00ean k\u1ebft quang kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25cf Ethernet c\u00f4ng nghi\u1ec7p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c m\u00e3 h\u00f3a PCS \u1ed5n \u0111\u1ecbnh l\u00e0 thi\u1ebft y\u1ebfu cho l\u01b0u l\u01b0\u1ee3ng x\u00e1c \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Ti\u1ec3u l\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd (Physical Coding Sublayer \u2013 PCS)<\/strong> l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 n\u1ec1n t\u1ea3ng c\u1ee7a ki\u1ebfn tr\u00fac PHY Ethernet, cho ph\u00e9p m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady, \u0111\u1ed3ng b\u1ed9 h\u00f3a v\u00e0 c\u0103n ch\u1ec9nh tr\u00ean c\u1ea3 ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn \u0111\u1ed3ng v\u00e0 quang. Khi t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u0103ng l\u00ean 100G, 200G v\u00e0 400G, PCS ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, h\u1ed7 tr\u1ee3 c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 m\u00e3 h\u00f3a ti\u00ean ti\u1ebfn v\u00e0 thi\u1ebft k\u1ebf nhi\u1ec1u k\u00eanh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng, k\u1ef9 s\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb g\u1ed1c (OEM), vi\u1ec7c hi\u1ec3u r\u00f5 PCS gi\u00fap \u0111\u1ea3m b\u1ea3o l\u1ef1a ch\u1ecdn \u0111\u00fang b\u1ed9 thu ph\u00e1t, th\u00e0nh ph\u1ea7n PHY v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng\u2014t\u1eeb \u0111\u00f3 cu\u1ed1i c\u00f9ng c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t li\u00ean k\u1ebft, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady t\u1ed5ng th\u1ec3 c\u1ee7a m\u1ea1ng.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u PCS (L\u1edbp m\u00e3 h\u00f3a v\u1eadt l\u00fd) l\u00e0 g\u00ec, c\u00e1ch n\u00f3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n d\u1eabn Ethernet \u0111\u00e1ng tin c\u1eady v\u00e0 l\u00fd do v\u00ec sao n\u00f3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi b\u1ed9 thu ph\u00e1t quang t\u1ed1c \u0111\u1ed9 cao v\u00e0 thi\u1ebft k\u1ebf m\u1ea1ng.<\/p>","protected":false},"author":1,"featured_media":3572,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[24,26],"class_list":["post-3573","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3573","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=3573"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3573\/revisions"}],"predecessor-version":[{"id":10822,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3573\/revisions\/10822"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3572"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}