{"id":3239,"date":"2026-02-28T00:00:00","date_gmt":"2026-02-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/sfp-bidirectional-transceiver-bidi-technical-guide\/"},"modified":"2026-06-22T04:09:23","modified_gmt":"2026-06-22T04:09:23","slug":"sfp-bidirectional-transceiver-bidi-technical-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-bidirectional-transceiver-bidi-technical-guide","title":{"rendered":"H\u01b0\u1edbng d\u1eabn K\u1ef9 thu\u1eadt B\u1ed9 thu ph\u00e1t SFP Hai chi\u1ec1u (BiDi)"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"628\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765.jpg\" alt=\"SFP Bidirectional Transceiver Technical Guide\" class=\"wp-image-3229\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/36d4df885ae74922af1cf0b9a7d65765-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491626.htm\"><strong>B\u1ed9 thu ph\u00e1t hai chi\u1ec1u SFP<\/strong><\/a><strong> (BiDi)<\/strong> l\u00e0 m\u1ed9t m\u00f4-\u0111un quang d\u1ea1ng c\u1eafm nh\u1ecf cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u song c\u00f4ng tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang \u0111\u01a1n mode (SMF) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng hai b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau\u2014m\u1ed9t cho truy\u1ec1n (Tx) v\u00e0 m\u1ed9t cho nh\u1eadn (Rx). Kh\u00e1c v\u1edbi c\u00e1c m\u00f4-\u0111un <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491947.htm\">SFP song c\u00f4ng<\/a> th\u00f4ng th\u01b0\u1eddng y\u00eau c\u1ea7u hai s\u1ee3i c\u00e1p (m\u1ed9t s\u1ee3i Tx v\u00e0 m\u1ed9t s\u1ee3i Rx), m\u00f4-\u0111un SFP BiDi t\u00edch h\u1ee3p b\u1ed9 gh\u00e9p k\u00eanh ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (WDM) b\u00ean trong \u0111\u1ec3 t\u00e1ch v\u00e0 k\u1ebft h\u1ee3p c\u00e1c t\u00edn hi\u1ec7u quang trong c\u00f9ng l\u00f5i s\u1ee3i c\u00e1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn tr\u00fac n\u00e0y cho ph\u00e9p c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng hi\u1ec7u qu\u1ea3 <strong>nh\u00e2n \u0111\u00f4i vi\u1ec7c s\u1eed d\u1ee5ng s\u1ee3i c\u00e1p quang<\/strong> m\u00e0 kh\u00f4ng c\u1ea7n l\u1eafp \u0111\u1eb7t th\u00eam h\u1ea1 t\u1ea7ng c\u00e1p quang. Do \u0111\u00f3, c\u00e1c m\u00f4-\u0111un SFP BiDi \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong c\u00e1c m\u00f4i tr\u01b0\u1eddng thi\u1ebfu c\u00e1p quang nh\u01b0 li\u00ean k\u1ebft n\u1ed9i b\u1ed9 doanh nghi\u1ec7p, m\u1ea1ng truy c\u1eadp FTTx v\u00e0 k\u1ebft n\u1ed1i bi\u00ean \u0111\u00f4 th\u1ecb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP BiDi th\u01b0\u1eddng c\u00f3 s\u1eb5n \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u Ethernet ti\u00eau chu\u1ea9n nh\u01b0 <strong>1G (<\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478478.htm\"><strong>1000BASE-BX<\/strong><\/a><strong>)<\/strong> and <strong>10G (<\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491572.htm\"><strong>10GBASE-BX<\/strong><\/a><strong>)<\/strong>, v\u1edbi c\u00e1c t\u00f9y ch\u1ecdn kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m <strong>10 km, 20 km v\u00e0 40 km<\/strong> tr\u00ean c\u00e1p quang \u0111\u01a1n mode. Kho\u1ea3ng c\u00e1ch d\u00e0i h\u01a1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 t\u00f9y thu\u1ed9c v\u00e0o ng\u00e2n s\u00e1ch quang h\u1ecdc v\u00e0 l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng. V\u00ec vi\u1ec7c truy\u1ec1n d\u1eabn x\u1ea3y ra tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p duy nh\u1ea5t b\u1eb1ng c\u00e1c c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ea5t \u0111\u1ed1i x\u1ee9ng (v\u00ed d\u1ee5: 1310 nm\/1490 nm ho\u1eb7c 1270 nm\/1330 nm), vi\u1ec7c gh\u00e9p \u0111\u00fang c\u1eb7p b\u01b0\u1edbc s\u00f3ng gi\u1eefa hai \u0111\u1ea7u li\u00ean k\u1ebft l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t ti\u00eau chu\u1ea9n, c\u00e1c m\u00f4-\u0111un SFP BiDi tu\u00e2n th\u1ee7 c\u00e1c \u0111\u1eb7c t\u1ea3 c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi Hi\u1ec7p \u0111\u1ecbnh \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/multi-source-agreements-optical-transceivers\/\">Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n<\/a> (SFP MSA) v\u00e0 th\u01b0\u1eddng h\u1ed7 tr\u1ee3 gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) nh\u01b0 quy \u0111\u1ecbnh trong SFF-8472. C\u00e1c th\u00f4ng s\u1ed1 quang Ethernet\u2014nh\u01b0 c\u00f4ng su\u1ea5t ph\u00e1t, \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu v\u00e0 gi\u1edbi h\u1ea1n t\u00e1n s\u1eafc\u2014\u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111i\u1ec1u kho\u1ea3n li\u00ean quan trong IEEE 802.3, t\u00f9y thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u00e0 l\u1edbp kho\u1ea3ng c\u00e1ch c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t SFP hai chi\u1ec1u\u2014c\u0169ng nh\u01b0 c\u00e1ch x\u00e1c minh vi\u1ec7c gh\u00e9p b\u01b0\u1edbc s\u00f3ng, t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 bi\u00ean \u0111\u1ed9 c\u00f4ng su\u1ea5t quang\u2014l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu tr\u01b0\u1edbc khi tri\u1ec3n khai. Vi\u1ec7c gh\u00e9p sai b\u01b0\u1edbc s\u00f3ng, kh\u00f4ng t\u01b0\u01a1ng th\u00edch ph\u1ea7n m\u1ec1m\u56fa\u4ef6 ho\u1eb7c t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 l\u00e0 nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y l\u1ed7i li\u00ean k\u1ebft trong c\u00e1c h\u1ec7 th\u1ed1ng quang s\u1eed d\u1ee5ng m\u1ed9t s\u1ee3i c\u00e1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt n\u00e0y cung c\u1ea5p gi\u1ea3i th\u00edch c\u00f3 c\u1ea5u tr\u00fac, t\u1eadp trung v\u00e0o k\u1ef9 thu\u1eadt v\u1ec1 c\u00e1c nguy\u00ean l\u00fd SFP BiDi hai chi\u1ec1u, chi\u1ebfn l\u01b0\u1ee3c gh\u00e9p b\u01b0\u1edbc s\u00f3ng, c\u00e1c y\u1ebfu t\u1ed1 t\u01b0\u01a1ng th\u00edch, t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 c\u00e1c th\u1ef1c ti\u1ec5n tri\u1ec3n khai t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 B\u1ed9 thu ph\u00e1t BiDi (SFP hai chi\u1ec1u) l\u00e0 g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e.jpg\" alt=\"What is a BiDi Transceiver\uff1f\" class=\"wp-image-3230\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e2bdb7971d5e483685ade99cf3ad380e-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>BiDi (SFP hai chi\u1ec1u)<\/strong> l\u00e0 m\u1ed9t m\u00f4-\u0111un quang d\u1ea1ng c\u1eafm cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u song c\u00f4ng tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang \u0111\u01a1n mode (SMF) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng hai b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau\u2014m\u1ed9t cho truy\u1ec1n (Tx) v\u00e0 m\u1ed9t cho nh\u1eadn (Rx). N\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y nh\u1edd t\u00edch h\u1ee3p b\u1ed9 gh\u00e9p k\u00eanh ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (WDM) b\u00ean trong \u0111\u1ec3 k\u1ebft h\u1ee3p \u00e1nh s\u00e1ng ph\u00e1t \u0111i v\u00e0 t\u00e1ch \u00e1nh s\u00e1ng nh\u1eadn v\u00e0o trong c\u00f9ng m\u1ed9t l\u00f5i s\u1ee3i c\u00e1p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tri\u1ec3n khai SFP song c\u00f4ng th\u00f4ng th\u01b0\u1eddng, c\u1ea7n hai s\u1ee3i c\u00e1p\u2014m\u1ed9t s\u1ee3i d\u00e0nh ri\u00eang cho Tx v\u00e0 m\u1ed9t s\u1ee3i cho Rx. M\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491620.htm\">B\u1ed9 thu ph\u00e1t SFP BiDi<\/a> lo\u1ea1i b\u1ecf y\u00eau c\u1ea7u n\u00e0y b\u1eb1ng c\u00e1ch g\u00e1n c\u00e1c b\u01b0\u1edbc s\u00f3ng b\u1ea5t \u0111\u1ed1i x\u1ee9ng t\u1ea1i m\u1ed7i \u0111\u1ea7u li\u00ean k\u1ebft. V\u00ed d\u1ee5: m\u1ed9t m\u00f4-\u0111un c\u00f3 th\u1ec3 ph\u00e1t \u1edf 1310 nm v\u00e0 nh\u1eadn \u1edf 1490 nm, trong khi m\u00f4-\u0111un gh\u00e9p c\u1eb7p v\u1edbi n\u00f3 l\u1ea1i ph\u00e1t \u1edf 1490 nm v\u00e0 nh\u1eadn \u1edf 1310 nm. Vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung n\u00e0y l\u00e0 \u0111i\u1ec1u ki\u1ec7n thi\u1ebft y\u1ebfu \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i sao SFP BiDi h\u1eefu \u00edch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ee3i th\u1ebf ch\u00ednh c\u1ee7a SFP BiDi l\u00e0 <strong>truy\u1ec1n song c\u00f4ng tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p<\/strong>. B\u1eb1ng c\u00e1ch gi\u1ea3m 50% l\u01b0\u1ee3ng c\u00e1p quang s\u1eed d\u1ee5ng tr\u00ean m\u1ed7i li\u00ean k\u1ebft, n\u00f3 mang l\u1ea1i l\u1ee3i \u00edch r\u00f5 r\u1ec7t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng thi\u1ebfu c\u00e1p quang ho\u1eb7c nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>M\u1ea1ng thi\u1ebfu c\u00e1p quang:<\/strong> L\u00fd t\u01b0\u1edfng cho x\u01b0\u01a1ng s\u1ed1ng n\u1ed9i b\u1ed9, c\u00e1c t\u00f2a nh\u00e0 c\u0169 v\u00e0 n\u00e2ng c\u1ea5p hi\u1ec7n h\u1eefu n\u01a1i s\u1ed1 l\u01b0\u1ee3ng s\u1ee3i c\u00e1p d\u1ef1 ph\u00f2ng b\u1ecb h\u1ea1n ch\u1ebf.<\/p><\/li>\n\n\n\n<li><p><strong>Tri\u1ec3n khai truy c\u1eadp v\u00e0 FTTx:<\/strong> S\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 h\u1ea1 t\u1ea7ng c\u00e1p quang hi\u1ec7n c\u00f3 m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1p b\u1ed5 sung.<\/p><\/li>\n\n\n\n<li><p><strong>T\u1ed1i \u01b0u h\u00f3a chi ph\u00ed:<\/strong> Chi ph\u00ed c\u00e1p v\u00e0 \u0111\u1ea5u n\u1ed1i th\u1ea5p h\u01a1n so v\u1edbi vi\u1ec7c tri\u1ec3n khai th\u00eam c\u00e1c c\u1eb7p c\u00e1p quang m\u1edbi.<\/p><\/li>\n\n\n\n<li><p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng h\u1ea1 t\u1ea7ng:<\/strong> Cho ph\u00e9p m\u1edf r\u1ed9ng m\u1ea1ng m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i h\u1ea1 t\u1ea7ng c\u00e1p quang v\u1eadt l\u00fd.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP BiDi th\u01b0\u1eddng c\u00f3 s\u1eb5n \u1edf t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u 1G v\u00e0 10G, v\u1edbi c\u00e1c t\u00f9y ch\u1ecdn kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh nh\u01b0 10 km, 20 km v\u00e0 40 km tr\u00ean c\u00e1p quang \u0111\u01a1n mode. \u0110\u1eb7c t\u00ednh c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n c\u1ee7a ch\u00fang tu\u00e2n th\u1ee7 Hi\u1ec7p \u0111\u1ecbnh \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf, trong khi hi\u1ec7u n\u0103ng quang h\u1ecdc ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111i\u1ec1u kho\u1ea3n li\u00ean quan c\u1ee7a <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">IEEE 802.3<\/a> cho bi\u1ebfn th\u1ec3 Ethernet \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, SFP hai chi\u1ec1u l\u00e0 m\u1ed9t b\u1ed9 thu ph\u00e1t quang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf k\u1ef9 l\u01b0\u1ee1ng theo b\u01b0\u1edbc s\u00f3ng nh\u1eb1m t\u1ed1i \u0111a h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p quang \u0111\u1ed3ng th\u1eddi duy tr\u00ec hi\u1ec7u n\u0103ng Ethernet ti\u00eau chu\u1ea9n tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p duy nh\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SFP hai chi\u1ec1u: WDM v\u00e0 nguy\u00ean l\u00fd laser<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491575.htm\"><strong>SFP hai chi\u1ec1u<\/strong><\/a> ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch truy\u1ec1n v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u quang tr\u00ean <strong>hai b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau qua m\u1ed9t s\u1ee3i c\u00e1p duy nh\u1ea5t<\/strong>, s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/wdm-optical-transceiver-module-applications\/\">gh\u00e9p k\u00eanh ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng<\/a> (WDM) b\u00ean trong \u0111\u1ec3 t\u00e1ch v\u00e0 k\u1ebft h\u1ee3p c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u00e1nh s\u00e1ng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p truy\u1ec1n th\u00f4ng Ethernet song c\u00f4ng m\u00e0 kh\u00f4ng c\u1ea7n s\u1ee3i c\u00e1p th\u1ee9 hai.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e.jpg\" alt=\"How Bidirectional SFP Work: WDM and Laser Principles\" class=\"wp-image-3231\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1c5766e575d743e1a1efc75a6dd5b36e-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Nguy\u00ean l\u00fd quang h\u1ecdc WDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00ean trong m\u00f4-\u0111un SFP hai chi\u1ec1u, m\u1ed9t b\u1ed9 gh\u00e9p k\u00eanh WDM thu nh\u1ecf (b\u1ed9 l\u1ecdc quang) <strong>th\u1ef1c hi\u1ec7n hai ch\u1ee9c n\u0103ng:<\/strong> K\u1ebft h\u1ee3p (gh\u00e9p k\u00eanh)<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p><strong>b\u01b0\u1edbc s\u00f3ng ph\u00e1t v\u00e0o s\u1ee3i c\u00e1p.<\/strong> T\u00e1ch (t\u00e1ch k\u00eanh).<\/p><\/li>\n\n\n\n<li><p><strong>b\u01b0\u1edbc s\u00f3ng nh\u1eadn t\u1eeb c\u00f9ng m\u1ed9t s\u1ee3i c\u00e1p.<\/strong> b\u01b0\u1edbc s\u00f3ng \u0111\u1ea7u v\u00e0o t\u1eeb s\u1ee3i c\u00e1p quang gi\u1ed1ng nhau.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed9 l\u1ecdc WDM c\u00f3 t\u00ednh ch\u1ecdn l\u1ecdc theo b\u01b0\u1edbc s\u00f3ng. N\u00f3 ph\u1ea3n x\u1ea1 m\u1ed9t b\u01b0\u1edbc s\u00f3ng v\u1ec1 ph\u00eda \u0111\u01b0\u1eddng d\u1eabn b\u1ed9 ph\u00e1t\/b\u1ed9 thu trong khi cho ph\u00e9p b\u01b0\u1edbc s\u00f3ng c\u00f2n l\u1ea1i \u0111i qua. S\u1ef1 c\u00e1ch ly quang h\u1ecdc n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00edn hi\u1ec7u \u0111i ra kh\u00f4ng g\u00e2y nhi\u1ec5u t\u00edn hi\u1ec7u \u0111i v\u00e0o, ngay c\u1ea3 khi c\u1ea3 hai chia s\u1ebb c\u00f9ng l\u00f5i s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y v\u1ec1 c\u01a1 b\u1ea3n kh\u00e1c bi\u1ec7t v\u1edbi vi\u1ec7c chia t\u00e1ch s\u1ee3i quang th\u1ee5 \u0111\u1ed9ng. C\u00e1c m\u00f4-\u0111un BiDi d\u1ef1a v\u00e0o vi\u1ec7c l\u1ecdc b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c, ch\u1ee9 kh\u00f4ng ph\u1ea3i ph\u00e2n chia theo th\u1eddi gian hay ph\u00e2n chia c\u00f4ng su\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Truy\u1ec1n d\u1eabn hai b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i li\u00ean k\u1ebft BiDi y\u00eau c\u1ea7u m\u1ed9t c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung nhau. C\u00e1c v\u00ed d\u1ee5 ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>1310 nm \/ 1490 nm<\/strong><\/p><\/li>\n\n\n\n<li><p><strong>1270 nm \/ 1330 nm<\/strong><\/p><\/li>\n\n\n\n<li><p><strong>1310 nm \/ 1550 nm<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i m\u1ed9t \u0111\u1ea7u c\u1ee7a li\u00ean k\u1ebft:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t = \u03bb1<\/p><\/li>\n\n\n\n<li><p>Thu = \u03bb2<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i \u0111\u1ea7u \u0111\u1ed1i di\u1ec7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t = \u03bb2<\/p><\/li>\n\n\n\n<li><p>Thu = \u03bb1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc s\u00f3ng ph\u00e1t c\u1ee7a m\u1ed9t m\u00f4-\u0111un ph\u1ea3i kh\u1edbp ch\u00ednh x\u00e1c v\u1edbi b\u01b0\u1edbc s\u00f3ng thu c\u1ee7a m\u00f4-\u0111un \u1edf \u0111\u1ea7u kia. Ngay c\u1ea3 khi hai m\u00f4-\u0111un c\u00f3 c\u00f9ng m\u1ee9c kho\u1ea3ng c\u00e1ch danh \u0111\u1ecbnh (v\u00ed d\u1ee5: 10 km), vi\u1ec7c gh\u00e9p sai b\u01b0\u1edbc s\u00f3ng s\u1ebd ng\u0103n ch\u1eb7n vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Do dung sai b\u01b0\u1edbc s\u00f3ng v\u00e0 c\u00f4ng su\u1ea5t ph\u00e1t thay \u0111\u1ed5i t\u00f9y nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 l\u1edbp kho\u1ea3ng c\u00e1ch, k\u1ef9 s\u01b0 lu\u00f4n ph\u1ea3i x\u00e1c minh <strong>th\u00f4ng s\u1ed1 b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c trong <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/file\/datasheet\/ls-bl55491g-20c.pdf\"><strong>b\u1ea3ng d\u1eef li\u1ec7u m\u00f4-\u0111un SFP<\/strong><\/a> tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ebfn tr\u00fac laser v\u00e0 b\u1ed9 thu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngu\u1ed3n quang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4-\u0111un BiDi SFP ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/dfb-laser-definition\/\" target=\"_blank\" rel=\"\"><strong>DFB<\/strong><\/a><strong> Laser ph\u1ea3n h\u1ed3i ph\u00e2n b\u1ed1 (Distributed Feedback)<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c m\u00f4-\u0111un BiDi \u0111\u01a1n mode c\u00f3 kho\u1ea3ng c\u00e1ch 10 km tr\u1edf l\u00ean do \u0111\u1ed9 r\u1ed9ng ph\u1ed5 h\u1eb9p v\u00e0 hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh v\u1ec1 b\u01b0\u1edbc s\u00f3ng.<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/fabry-perot-laser-diodes-in-optical-modules\/\" target=\"_blank\" rel=\"\"><strong>FP<\/strong><\/a><strong> Laser Fabry\u2013Perot<\/strong> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u00f9ng trong m\u1ed9t s\u1ed1 tri\u1ec3n khai BiDi ng\u1eafn kho\u1ea3ng c\u00e1ch 1G.<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/overview-of-vcsel\/\" target=\"_blank\" rel=\"\"><strong>Laser VCSEL.<\/strong><\/a><strong> laser<\/strong> n\u00f3i chung kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c m\u00f4-\u0111un BiDi \u0111\u01a1n mode kho\u1ea3ng c\u00e1ch xa; ch\u00fang ph\u1ed5 bi\u1ebfn h\u01a1n trong c\u00e1c thi\u1ebft b\u1ecb quang \u0111a mode kho\u1ea3ng c\u00e1ch ng\u1eafn (v\u00ed d\u1ee5: \u1ee9ng d\u1ee5ng 850 nm).<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 ph\u00eda thu, m\u00f4-\u0111un bao g\u1ed3m m\u1ed9t \u0111i\u1ed1t quang \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p v\u1edbi d\u1ea3i b\u01b0\u1edbc s\u00f3ng thu v\u00e0o, c\u00f9ng v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i chuy\u1ec3n tr\u1edf (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/transimpedance-amplifiers-tias-how-they-work-and-applications\/\">TIA<\/a>) v\u00e0 b\u1ed9 khu\u1ebfch \u0111\u1ea1i gi\u1edbi h\u1ea1n \u0111\u1ec3 kh\u00f4i ph\u1ee5c t\u00edn hi\u1ec7u \u0111i\u1ec7n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Logic \u00e1nh x\u1ea1 n\u1ed9i b\u1ed9 gi\u1eefa \u0111\u01b0\u1eddng ph\u00e1t\/thu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t \u0111i\u1ec7n, m\u00f4-\u0111un BiDi SFP ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 m\u00f4-\u0111un SFP duplex ti\u00eau chu\u1ea9n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Thi\u1ebft b\u1ecb ch\u1ee7 g\u1eedi d\u1eef li\u1ec7u \u0111i\u1ec7n \u0111\u1ec3 ph\u00e1t (TX+ \/ TX\u2212) t\u1edbi m\u00f4-\u0111un.<\/p><\/li>\n\n\n\n<li><p>M\u00f4-\u0111un chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u n\u00e0y th\u00e0nh \u0111\u1ea7u ra quang t\u1ea1i b\u01b0\u1edbc s\u00f3ng ph\u00e1t \u0111\u01b0\u1ee3c g\u00e1n cho n\u00f3.<\/p><\/li>\n\n\n\n<li><p>D\u1eef li\u1ec7u quang \u0111\u1ea7u v\u00e0o t\u1ea1i b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i tr\u1edf l\u1ea1i th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n RX+ \/ RX\u2212 \u0111\u1ec3 g\u1eedi t\u1edbi thi\u1ebft b\u1ecb ch\u1ee7.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb g\u00f3c nh\u00ecn c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t logic n\u00e0o gi\u1eefa m\u00f4-\u0111un BiDi SFP v\u00e0 m\u00f4-\u0111un SFP duplex. H\u00e0nh vi s\u1eed d\u1ee5ng m\u1ed9t s\u1ee3i quang \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd ho\u00e0n to\u00e0n trong mi\u1ec1n quang h\u1ecdc c\u1ee7a m\u00f4-\u0111un.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n, c\u00e1c m\u00f4-\u0111un BiDi SFP tu\u00e2n th\u1ee7 c\u00e1c \u0111\u1eb7c t\u1ea3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf (Small Form Factor Multi-Source Agreement), trong khi gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (n\u1ebfu h\u1ed7 tr\u1ee3) tu\u00e2n theo ti\u00eau chu\u1ea9n SFF-8472.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491461.htm\">M\u00f4-\u0111un SFP hai chi\u1ec1u<\/a> s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc ch\u1ecdn l\u1ecdc b\u01b0\u1edbc s\u00f3ng v\u00e0 \u0111i\u1ec1u khi\u1ec3n laser ch\u00ednh x\u00e1c \u0111\u1ec3 cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u Ethernet hai chi\u1ec1u tr\u00ean m\u1ed9t s\u1ee3i quang\u2014m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng duplex \u0111\u1ea7y \u0111\u1ee7 hay t\u00ednh tu\u00e2n th\u1ee7 chu\u1ea9n Ethernet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 Gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng v\u00e0 c\u00e1c lo\u1ea1i SFP BiDi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng \u0111\u00fang l\u00e0 y\u00eau c\u1ea7u quan tr\u1ecdng nh\u1ea5t trong tri\u1ec3n khai SFP hai chi\u1ec1u. M\u1ed9t li\u00ean k\u1ebft BiDi ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng khi b\u01b0\u1edbc s\u00f3ng ph\u00e1t (Tx) c\u1ee7a m\u1ed9t m\u00f4-\u0111un kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng thu (Rx) c\u1ee7a m\u00f4-\u0111un \u1edf \u0111\u1ea7u \u0111\u1ed1i di\u1ec7n\u2014and ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad.jpg\" alt=\"BiDi SFP Wavelength Pairing and Types\" class=\"wp-image-3232\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0f2205f837124310ab84c73ddfb376ad-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch kh\u00e1i ni\u1ec7m gh\u00e9p c\u1eb7p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u1ed9t li\u00ean k\u1ebft BiDi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ea7u A:<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t = \u03bb1<\/p><\/li>\n\n\n\n<li><p>Thu = \u03bb2<\/p><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><p><strong>\u0110\u1ea7u B:<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t = \u03bb2<\/p><\/li>\n\n\n\n<li><p>Thu = \u03bb1<\/p><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea5u h\u00ecnh b\u1ed5 sung nhau n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00edn hi\u1ec7u quang ph\u00e1t t\u1eeb \u0110\u1ea7u A \u0111\u01b0\u1ee3c \u0110\u1ea7u B thu t\u1ea1i b\u01b0\u1edbc s\u00f3ng \u0111\u00fang, v\u00e0 l\u01b0u l\u01b0\u1ee3ng tr\u1ea3 l\u1eddi \u0111i theo \u0111\u01b0\u1eddng d\u1eabn b\u01b0\u1edbc s\u00f3ng ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u1ea3 hai \u0111\u1ea7u \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f9ng b\u01b0\u1edbc s\u00f3ng ph\u00e1t (v\u00ed d\u1ee5: c\u1ea3 hai \u0111\u1ec1u ph\u00e1t t\u1ea1i 1310 nm), li\u00ean k\u1ebft s\u1ebd kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c v\u00ec m\u1ed7i b\u1ed9 thu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh cho m\u1ed9t d\u1ea3i b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27039-1g-bidi-sfp.htm\">m\u00f4-\u0111un BiDi<br><\/a> Do \u0111\u00f3, c\u00e1c m\u00f4-\u0111un n\u00e0y lu\u00f4n \u0111\u01b0\u1ee3c tri\u1ec3n khai d\u01b0\u1edbi d\u1ea1ng <strong>c\u00e1c c\u1eb7p t\u01b0\u01a1ng th\u00edch<\/strong>, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111\u01a1n v\u1ecb \u0111\u1ed9c l\u1eadp gi\u1ed1ng h\u1ec7t nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c c\u1eb7p b\u01b0\u1edbc s\u00f3ng BiDi ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 l\u1edbp kho\u1ea3ng c\u00e1ch, c\u00e1c t\u1ed5 h\u1ee3p b\u01b0\u1edbc s\u00f3ng SFP BiDi \u0111\u01a1n mode ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>1310 nm \/ 1490 nm<\/strong> (\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c phi\u00ean b\u1ea3n 1G v\u00e0 m\u1ed9t s\u1ed1 phi\u00ean b\u1ea3n 10G)<\/p><\/li>\n\n\n\n<li><p><strong>1270 nm \/ 1330 nm<\/strong> (ph\u1ed5 bi\u1ebfn trong <a href=\"https:\/\/www.l-p.com\/products\/482654.htm\" target=\"_self\">tri\u1ec3n khai BiDi 10G<\/a> )<\/p><\/li>\n\n\n\n<li><p><strong>1310 nm \/ 1550 nm<\/strong> (\u0111\u01b0\u1ee3c d\u00f9ng trong m\u1ed9t s\u1ed1 tri\u1ec3n khai kho\u1ea3ng c\u00e1ch xa h\u01a1n)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i m\u00f4-\u0111un A: Ph\u00e1t 1310 nm \/ Thu 1490 nm<\/p><\/li>\n\n\n\n<li><p>Lo\u1ea1i m\u00f4-\u0111un B: Ph\u00e1t 1490 nm \/ Thu 1310 nm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hai m\u00f4-\u0111un n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t t\u1ea1i hai \u0111\u1ea7u \u0111\u1ed1i di\u1ec7n c\u1ee7a c\u00f9ng m\u1ed9t s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea7n l\u01b0u \u00fd r\u1eb1ng c\u00e1c k\u00fd hi\u1ec7u b\u01b0\u1edbc s\u00f3ng ch\u1ec9 l\u00e0 b\u01b0\u1edbc s\u00f3ng trung t\u00e2m danh \u0111\u1ecbnh. Vi\u1ec7c ph\u00e1t laser th\u1ef1c t\u1ebf c\u00f3 dung sai \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh (v\u00ed d\u1ee5: \u00b110 nm t\u00f9y theo thi\u1ebft k\u1ebf v\u00e0 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u). K\u1ef9 s\u01b0 n\u00ean x\u00e1c minh d\u1ea3i b\u01b0\u1edbc s\u00f3ng th\u1ef1c t\u1ebf v\u00e0 \u0111\u1eb7c t\u00ednh ph\u1ed5 trong b\u1ea3ng d\u1eef li\u1ec7u m\u00f4-\u0111un.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00ec sao b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh v\u00e0 dung sai l\u1ea1i quan tr\u1ecdng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi hai m\u00f4-\u0111un \u0111\u1ec1u \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201c1310 nm\u201d, s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 d\u1ea3i b\u01b0\u1edbc s\u00f3ng trung t\u00e2m, \u0111\u1ed9 r\u1ed9ng ph\u1ed5 ho\u1eb7c d\u1ea3i th\u00f4ng qua c\u1ee7a b\u1ed9 thu c\u00f3 th\u1ec3 ng\u0103n c\u1ea3n kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng nhi\u1ec1u nh\u00e0 cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Tri\u1ec3n khai kho\u1ea3ng c\u00e1ch xa (20 km \/ 40 km)<\/p><\/li>\n\n\n\n<li><p>\u1ee8ng d\u1ee5ng truy c\u1eadp m\u1eadt \u0111\u1ed9 cao ho\u1eb7c \u0111\u00f4 th\u1ecb<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec l\u00fd do n\u00e0y, lu\u00f4n c\u1ea7n x\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng ph\u00e1t danh \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>D\u1ea3i dung sai b\u01b0\u1edbc s\u00f3ng<\/p><\/li>\n\n\n\n<li><p>C\u1eb7p b\u1ed5 sung \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n\n\n\n<li><p>D\u1ea3i ch\u1ea5p nh\u1eadn b\u01b0\u1edbc s\u00f3ng c\u1ee7a b\u1ed9 thu<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo c\u00e1c \u0111\u1eb7c t\u1ea3 quang h\u1ecdc Ethernet li\u00ean quan trong IEEE 802.3 d\u00e0nh cho t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u \u00e1p d\u1ee5ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eadn d\u1ea1ng b\u01b0\u1edbc s\u00f3ng trong EEPROM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un BiDi SFP l\u01b0u tr\u1eef th\u00f4ng tin b\u01b0\u1edbc s\u00f3ng v\u00e0 nh\u1eadn d\u1ea1ng trong b\u1ed9 nh\u1edb c\u1ee7a ch\u00fang <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-eeprom-powers-sfp-and-qsfp-optical-modules\/\">B\u1ed9 nh\u1edb EEPROM<\/a> b\u1ea3n \u0111\u1ed3 b\u1ed9 nh\u1edb, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf v\u00e0 c\u00e1c ph\u1ea7n m\u1edf r\u1ed9ng gi\u00e1m s\u00e1t k\u1ef9 thu\u1eadt s\u1ed1 trong <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-8472-standard-explained-ddm-for-optical-transceivers\/\">Long-distance fiber links<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng EEPROM quan tr\u1ecdng th\u01b0\u1eddng bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ean nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 m\u00e3 linh ki\u1ec7n<\/p><\/li>\n\n\n\n<li><p>OUI c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Gi\u00e1 tr\u1ecb b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>C\u1edd kh\u1ea3 n\u0103ng gi\u00e1m s\u00e1t k\u1ef9 thu\u1eadt s\u1ed1 (DOM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u1ecdc th\u00f4ng tin n\u00e0y b\u1eb1ng c\u00e1c l\u1ec7nh CLI nh\u01b0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c minh gi\u00e1 tr\u1ecb b\u01b0\u1edbc s\u00f3ng do EEPROM b\u00e1o c\u00e1o tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t gi\u00fap gi\u1ea3m r\u1ee7i ro gh\u00e9p n\u1ed1i sai\u2014\u0111\u1eb7c bi\u1ec7t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng n\u01a1i d\u1ef1 tr\u1eef nhi\u1ec1u b\u1ed9 b\u01b0\u1edbc s\u00f3ng BiDi kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u1ef1c h\u00e0nh k\u1ef9 thu\u1eadt t\u1ed1t nh\u1ea5t<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n tri\u1ec3n khai c\u00e1c m\u00f4-\u0111un hai chi\u1ec1u (Bidirectional) theo t\u1eebng c\u1eb7p b\u1ed5 sung \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh.<\/p><\/li>\n\n\n\n<li><p>G\u1eafn nh\u00e3n v\u1eadt l\u00fd h\u01b0\u1edbng b\u01b0\u1edbc s\u00f3ng (v\u00ed d\u1ee5: \u201c1310-TX\u201d) \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn.<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn gi\u00e1 tr\u1ecb b\u01b0\u1edbc s\u00f3ng trong EEPROM tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t.<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng x\u1ebfp h\u1ea1ng kho\u1ea3ng c\u00e1ch t\u01b0\u01a1ng \u0111\u01b0\u01a1ng \u0111\u1ed3ng ngh\u0129a v\u1edbi kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai BiDi, vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng l\u00e0 b\u1eaft bu\u1ed9c\u2014\u0111\u00e2y l\u00e0 c\u01a1 ch\u1ebf n\u1ec1n t\u1ea3ng cho ph\u00e9p ho\u1ea1t \u0111\u1ed9ng hai chi\u1ec1u \u0111\u1ea7y \u0111\u1ee7 tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang \u0111\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 \u01afu \u0111i\u1ec3m v\u00e0 H\u1ea1n ch\u1ebf c\u1ee7a c\u00e1c m\u00f4-\u0111un hai chi\u1ec1u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27039-1g-bidi-sfp.htm\">M\u00f4-\u0111un chuy\u1ec3n \u0111\u1ed5i hai chi\u1ec1u SFP<\/a> cung c\u1ea5p gi\u1ea3i ph\u00e1p th\u1ef1c t\u1ebf nh\u1eb1m t\u1ed1i \u0111a h\u00f3a hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng c\u00e1p quang, nh\u01b0ng l\u1ee3i \u00edch c\u1ee7a ch\u00fang \u0111i k\u00e8m c\u00e1c c\u00e2n nh\u1eafc k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u1ea3 \u01b0u \u0111i\u1ec3m l\u1eabn r\u00e0ng bu\u1ed9c l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u01afu \u0111i\u1ec3m c\u1ee7a m\u00f4-\u0111un SFP BiDi<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6-1024x576.jpg\" alt=\"Advantages and Limitations of Bidirectional Modules\" class=\"wp-image-3233\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6-18x10.jpg 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/92484b7e790d45b9a76222c7c6167fa6.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">S\u1eed d\u1ee5ng c\u00e1p quang hi\u1ec7u qu\u1ea3<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt nh\u1ea5t c\u1ee7a <strong>B\u1ed9 thu ph\u00e1t hai chi\u1ec1u SFP<\/strong> l\u00e0 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 truy\u1ec1n th\u00f4ng hai chi\u1ec1u \u0111\u1ea7y \u0111\u1ee7 tr\u00ean <strong>m\u1ed9t s\u1ee3i c\u00e1p quang \u0111\u01a1n mode duy nh\u1ea5t<\/strong>. So v\u1edbi c\u00e1c quang h\u1ecdc SFP hai chi\u1ec1u truy\u1ec1n th\u1ed1ng y\u00eau c\u1ea7u hai s\u1ee3i c\u00e1p cho m\u1ed7i li\u00ean k\u1ebft, c\u00e1c m\u00f4-\u0111un BiDi gi\u1ea3m ti\u00eau th\u1ee5 c\u00e1p quang t\u1edbi 50%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t c\u00f3 gi\u00e1 tr\u1ecb trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c t\u00f2a nh\u00e0 thi\u1ebfu c\u00e1p quang<\/p><\/li>\n\n\n\n<li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u0169 v\u1edbi s\u1ed1 l\u01b0\u1ee3ng s\u1ee3i c\u00e1p d\u1ef1 ph\u00f2ng h\u1ea1n ch\u1ebf<\/p><\/li>\n\n\n\n<li><p>C\u00e1c l\u1edbp truy c\u1eadp v\u00e0 t\u1eadp h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>M\u00f4i tr\u01b0\u1eddng khu\u00f4n vi\u00ean ho\u1eb7c \u0111\u00f4 th\u1ecb, n\u01a1i vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1p quang m\u1edbi t\u1ed1n k\u00e9m<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Chi ph\u00ed c\u00e1p v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng th\u1ea5p h\u01a1n<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec ch\u1ec9 c\u1ea7n m\u1ed9t s\u1ee3i c\u00e1p quang:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ed1 l\u00f5i c\u00e1p quang c\u1ea7n thi\u1ebft trong c\u00e1c tuy\u1ebfn c\u00e1p ch\u00ednh gi\u1ea3m \u0111i<\/p><\/li>\n\n\n\n<li><p>M\u1eadt \u0111\u1ed9 b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel) gi\u1ea3m<\/p><\/li>\n\n\n\n<li><p>S\u1ed1 \u0111i\u1ec3m n\u1ed1i (termination point) c\u1ea7n thi\u1ebft gi\u1ea3m<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 gi\u00e1 th\u00e0nh \u0111\u01a1n v\u1ecb c\u1ee7a m\u1ed9t m\u00f4-\u0111un BiDi c\u00f3 th\u1ec3 cao h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi m\u00f4-\u0111un SFP hai chi\u1ec1u ti\u00eau chu\u1ea9n, th\u00ec <strong>chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng t\u1ed5ng th\u1ec3 th\u01b0\u1eddng th\u1ea5p h\u01a1n<\/strong> khi t\u00ednh \u0111\u1ebfn chi ph\u00ed l\u1eafp \u0111\u1eb7t c\u00e1p quang, \u0111\u00e0o r\u00e3nh v\u00e0 h\u00e0n n\u1ed1i.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">N\u00e2ng c\u1ea5p v\u00e0 m\u1edf r\u1ed9ng m\u1ea1ng d\u1ec5 d\u00e0ng h\u01a1n<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP BiDi \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c n\u00e2ng c\u1ea5p hi\u1ec7n tr\u01b0\u1eddng (brownfield). Thay v\u00ec k\u00e9o c\u00e1p quang hai chi\u1ec1u m\u1edbi, c\u00e1c nh\u00e0 v\u1eadn h\u00e0nh c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00e1i s\u1eed d\u1ee5ng c\u00e1c s\u1ee3i c\u00e1p quang \u0111\u01a1n hi\u1ec7n c\u00f3<\/p><\/li>\n\n\n\n<li><p>T\u0103ng dung l\u01b0\u1ee3ng li\u00ean k\u1ebft m\u00e0 kh\u00f4ng thay \u0111\u1ed5i c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng v\u1eadt l\u00fd<\/p><\/li>\n\n\n\n<li><p>M\u1edf r\u1ed9ng d\u1ecbch v\u1ee5 m\u1ea1ng m\u00e0 kh\u00f4ng c\u1ea7n thi c\u00f4ng l\u1edbn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec c\u00e1c m\u00f4-\u0111un hai chi\u1ec1u tu\u00e2n th\u1ee7 \u0111\u1eb7c t\u1ea3 c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n c\u1ee7a Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf (MSA), n\u00ean ch\u00fang c\u00f3 th\u1ec3 thay th\u1ebf v\u1eadt l\u00fd cho c\u00e1c c\u1ed5ng SFP ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1ea1n ch\u1ebf v\u00e0 C\u00e1c c\u00e2n nh\u1eafc k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">R\u1ee7i ro gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c v\u1edbi c\u00e1c quang h\u1ecdc hai chi\u1ec1u ti\u00eau chu\u1ea9n, c\u00e1c m\u00f4-\u0111un BiDi ph\u1ea3i \u0111\u01b0\u1ee3c tri\u1ec3n khai theo <strong>c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/strong>. Vi\u1ec7c gh\u00e9p sai (v\u00ed d\u1ee5: l\u1eafp c\u00f9ng b\u01b0\u1edbc s\u00f3ng ph\u00e1t t\u1ea1i c\u1ea3 hai \u0111\u1ea7u) s\u1ebd ng\u0103n ch\u1eb7n vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng n\u01a1i d\u1ef1 tr\u1eef nhi\u1ec1u t\u1ed5 h\u1ee3p b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau, vi\u1ec7c tri\u1ec3n khai sai l\u00e0 m\u1ed9t r\u1ee7i ro v\u1eadn h\u00e0nh ph\u1ed5 bi\u1ebfn. Vi\u1ec7c d\u00e1n nh\u00e3n \u0111\u00fang v\u00e0 ki\u1ec3m so\u00e1t t\u1ed3n kho l\u00e0 b\u1eaft bu\u1ed9c.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Chi ph\u00ed m\u00f4-\u0111un h\u01a1i cao h\u01a1n<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP hai chi\u1ec1u t\u00edch h\u1ee3p c\u00e1c th\u00e0nh ph\u1ea7n l\u1ecdc WDM n\u1ed9i b\u1ed9 v\u00e0 th\u01b0\u1eddng s\u1eed d\u1ee5ng ngu\u1ed3n laser \u0111\u1ed9 ch\u00ednh x\u00e1c cao (th\u01b0\u1eddng l\u00e0 laser DFB cho kho\u1ea3ng c\u00e1ch xa h\u01a1n). Do \u0111\u00f3, chi ph\u00ed m\u00f4-\u0111un c\u00f3 th\u1ec3 cao h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi c\u00e1c quang h\u1ecdc SFP hai chi\u1ec1u t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, s\u1ef1 ch\u00eanh l\u1ec7ch chi ph\u00ed n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c b\u00f9 \u0111\u1eafp nh\u1edd ti\u1ebft ki\u1ec7m chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Ph\u1ee5 thu\u1ed9c v\u00e0o firmware v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb m\u1ea1ng \u00e1p d\u1ee5ng x\u00e1c th\u1ef1c m\u00f4-\u0111un quang h\u1ecdc th\u00f4ng qua ki\u1ec3m tra EEPROM. N\u1ebfu c\u00e1c tr\u01b0\u1eddng nh\u1eadn d\u1ea1ng m\u00f4-\u0111un kh\u00f4ng kh\u1edbp v\u1edbi h\u1ed3 s\u01a1 nh\u00e0 s\u1ea3n xu\u1ea5t d\u1ef1 ki\u1ebfn, thi\u1ebft b\u1ecb c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t c\u1ea3nh b\u00e1o<\/p><\/li>\n\n\n\n<li><p>V\u00f4 hi\u1ec7u h\u00f3a giao di\u1ec7n<\/p><\/li>\n\n\n\n<li><p>Gi\u1edbi h\u1ea1n ch\u1ee9c n\u0103ng DOM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1ch thi\u1ebft b\u1ecb ch\u1ee7 di\u1ec5n gi\u1ea3i c\u00e1c tr\u01b0\u1eddng EEPROM \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong c\u00e1c \u0111\u1eb7c t\u1ea3 SFF-8472 v\u00e0 SFP MSA. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476696.htm\">C\u00e1c m\u00f4-\u0111un BiDi c\u1ee7a b\u00ean th\u1ee9 ba<\/a> ph\u1ea3i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u00fang cho n\u1ec1n t\u1ea3ng m\u1ee5c ti\u00eau.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u0110\u1ed9 d\u1ef1 ph\u00f2ng quang h\u1ecdc gi\u1ea3m trong \u0111i\u1ec1u ki\u1ec7n c\u00e1p quang k\u00e9m<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec truy\u1ec1n th\u00f4ng BiDi d\u1ef1a v\u00e0o vi\u1ec7c l\u1ecdc b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang duy nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao cao<\/p><\/li>\n\n\n\n<li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i qu\u00e1 m\u1ee9c<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n k\u00e9m<\/p><\/li>\n\n\n\n<li><p>L\u00e3o h\u00f3a ho\u1eb7c nhi\u1ec5m b\u1ea9n c\u00e1p quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 d\u1ef1 ph\u00f2ng quang h\u1ecdc r\u00f5 r\u1ec7t h\u01a1n so v\u1edbi c\u00e1c li\u00ean k\u1ebft hai chi\u1ec1u ng\u1eafn. M\u1eb7c d\u00f9 ng\u00e2n s\u00e1ch quang h\u1ecdc \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n theo c\u00f9ng c\u00e1ch nh\u01b0 c\u00e1c li\u00ean k\u1ebft SFP ti\u00eau chu\u1ea9n, k\u1ef9 s\u01b0 ph\u1ea3i x\u00e1c th\u1ef1c k\u1ef9 t\u1ed5n hao li\u00ean k\u1ebft tr\u01b0\u1edbc khi tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u00e1nh gi\u00e1 th\u1ef1c ti\u1ec5n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/481691.htm\">C\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i hai chi\u1ec1u<\/a> r\u1ea5t hi\u1ec7u qu\u1ea3 khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u1ea3 n\u0103ng cung c\u1ea5p c\u00e1p quang b\u1ecb h\u1ea1n ch\u1ebf<\/p><\/li>\n\n\n\n<li><p>Gi\u1ea3m chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u<\/p><\/li>\n\n\n\n<li><p>C\u00e1c quy tr\u00ecnh gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng \u0111\u01b0\u1ee3c tu\u00e2n th\u1ee7 \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang \u0111\u00f2i h\u1ecfi c\u00e1c th\u1ef1c ti\u1ec5n tri\u1ec3n khai k\u1ef7 lu\u1eadt\u2014\u0111\u1eb7c bi\u1ec7t v\u1ec1 kh\u1edbp b\u01b0\u1edbc s\u00f3ng, t\u01b0\u01a1ng th\u00edch firmware v\u00e0 x\u00e1c minh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft\u2014nh\u01b0ng khi \u0111\u01b0\u1ee3c tri\u1ec3n khai \u0111\u00fang c\u00e1ch, ch\u00fang cung c\u1ea5p hi\u1ec7u su\u1ea5t Ethernet \u0111\u00e1ng tin c\u1eady v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang \u0111\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch &amp; M\u00e3 h\u00f3a EEPROM cho m\u00f4-\u0111un SFP BiDi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 v\u1eadn h\u00e0nh quan tr\u1ecdng nh\u1ea5t khi tri\u1ec3n khai m\u1ed9t<strong> SFP hai chi\u1ec1u<\/strong>. M\u1eb7c d\u00f9 c\u00e1c m\u00f4-\u0111un BiDi tu\u00e2n theo \u0111\u1ecbnh ngh\u0129a c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n c\u1ee7a Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf (Small Form Factor MSA), c\u00e1c thi\u1ebft b\u1ecb ch\u1ee7 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng x\u00e1c th\u1ef1c \u1edf c\u1ea5p firmware d\u1ef1a tr\u00ean d\u1eef li\u1ec7u nh\u1eadn d\u1ea1ng EEPROM.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1.jpg\" alt=\"Compatibility &amp; EEPROM Coding for BiDi SFPs\" class=\"wp-image-3234\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ec3ade346f8243cb9fc642d3758fd5b1-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c tr\u01b0\u1eddng b\u1ed9 nh\u1edb EEPROM x\u00e1c \u0111\u1ecbnh m\u1ed9t m\u00f4-\u0111un BiDi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i m\u00f4-\u0111un SFP ch\u1ee9a m\u1ed9t b\u1ed9 nh\u1edb EEPROM n\u1ed1i ti\u1ebfp l\u01b0u tr\u1eef th\u00f4ng tin nh\u1eadn d\u1ea1ng v\u00e0 ch\u1ea9n \u0111o\u00e1n chu\u1ea9n h\u00f3a. C\u1ea5u tr\u00fac b\u1ea3n \u0111\u1ed3 b\u1ed9 nh\u1edb \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi SFP MSA, v\u1edbi c\u00e1c ch\u1ee9c n\u0103ng ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong SFF-8472.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c tr\u01b0\u1eddng EEPROM quan tr\u1ecdng trong b\u1ed9 thu ph\u00e1t hai chi\u1ec1u SFP<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng EEPROM<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee5c \u0111\u00edch k\u1ef9 thu\u1eadt<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>L\u00fd do tr\u01b0\u1eddng n\u00e0y quan tr\u1ecdng trong tri\u1ec3n khai BiDi<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u00ean nh\u00e0 cung c\u1ea5p<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Chu\u1ed7i \u0111\u1ecbnh danh nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c thi\u1ebft b\u1ecb ch\u1ee7 s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c th\u1ef1c c\u00e1c module quang h\u1ecdc \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>OUI c\u1ee7a nh\u00e0 cung c\u1ea5p (Organizationally Unique Identifier)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e3 \u0111\u1ecbnh danh c\u00f4ng ty do IEEE c\u1ea5p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng x\u00e1c minh OUI \u0111\u1ec3 ch\u1ea5p nh\u1eadn firmware<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>S\u1ed1 hi\u1ec7u ph\u1ee5 t\u00f9ng nh\u00e0 cung c\u1ea5p (PN)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ecbnh danh c\u1ee5 th\u1ec3 cho m\u1eabu module quang h\u1ecdc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch truy\u1ec1n, c\u1eb7p b\u01b0\u1edbc s\u00f3ng v\u00e0 h\u1ed3 s\u01a1 m\u00e3 h\u00f3a<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>S\u1ed1 s\u00ea-ri<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ecbnh danh s\u1ea3n xu\u1ea5t duy nh\u1ea5t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cho ph\u00e9p truy xu\u1ea5t ngu\u1ed3n g\u1ed1c v\u00e0 theo d\u00f5i v\u00f2ng \u0111\u1eddi<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>B\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u01b0\u1edbc s\u00f3ng ph\u00e1t trung t\u00e2m (v\u00ed d\u1ee5: 1310 nm, 1490 nm, 1550 nm)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Quan tr\u1ecdng \u0111\u1ec3 gh\u00e9p n\u1ed1i b\u1ed5 sung ch\u00ednh x\u00e1c<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 t\u00edn hi\u1ec7u danh \u0111\u1ecbnh (1G, 10G, v.v.)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea3i t\u01b0\u01a1ng th\u00edch v\u1edbi kh\u1ea3 n\u0103ng giao di\u1ec7n ch\u1ee7<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>C\u1edd h\u1ed7 tr\u1ee3 gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 (DOM)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cho bi\u1ebft kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 gi\u00e1m s\u00e1t quang h\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cho ph\u00e9p \u0111\u1ecdc gi\u00e1 tr\u1ecb c\u00f4ng su\u1ea5t ph\u00e1t\/nh\u1eadn, nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p theo th\u1eddi gian th\u1ef1c<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u00e3 tu\u00e2n th\u1ee7 b\u1ed9 thu ph\u00e1t<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c \u0111\u1ecbnh danh tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n Ethernet<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c nh\u1eadn s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c t\u1ea3 Ethernet c\u1ee7a IEEE<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c module BiDi, <strong>tr\u01b0\u1eddng b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh l\u00e0 r\u1ea5t quan tr\u1ecdng<\/strong>, v\u00ec n\u00f3 x\u00e1c \u0111\u1ecbnh module thu\u1ed9c ph\u00eda \u201cA\u201d hay \u201cB\u201d trong m\u1ed9t c\u1eb7p b\u1ed5 sung (v\u00ed d\u1ee5: bi\u1ebfn th\u1ec3 ph\u00e1t 1310 nm so v\u1edbi ph\u00e1t 1490 nm).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u00f3a nh\u00e0 cung c\u1ea5p v\u00e0 vi\u1ec7c th\u1ef1c thi firmware<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn tri\u1ec3n khai ki\u1ec3m tra \u1edf c\u1ea5p firmware nh\u1eb1m x\u00e1c th\u1ef1c n\u1ed9i dung EEPROM tr\u01b0\u1edbc khi k\u00edch ho\u1ea1t c\u1ed5ng. T\u00f9y theo n\u1ec1n t\u1ea3ng v\u00e0 phi\u00ean b\u1ea3n firmware, thi\u1ebft b\u1ecb c\u00f3 th\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ch\u1ea5p nh\u1eadn module m\u00e0 kh\u00f4ng c\u00f3 h\u1ea1n ch\u1ebf n\u00e0o<\/p><\/li>\n\n\n\n<li><p>Hi\u1ec3n th\u1ecb c\u1ea3nh b\u00e1o \u201ckh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn\u201d<\/p><\/li>\n\n\n\n<li><p>V\u00f4 hi\u1ec7u h\u00f3a ho\u00e0n to\u00e0n c\u1ed5ng<\/p><\/li>\n\n\n\n<li><p>H\u1ea1n ch\u1ebf quy\u1ec1n truy c\u1eadp gi\u00e1m s\u00e1t DOM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1eddng OUI v\u00e0 s\u1ed1 hi\u1ec7u ph\u1ee5 t\u00f9ng nh\u00e0 cung c\u1ea5p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c n\u00e0y. Trong m\u1ed9t s\u1ed1 m\u00f4i tr\u01b0\u1eddng, c\u00e1c module b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u00f3 th\u1ec3 g\u00e2y ra th\u00f4ng b\u00e1o nh\u1eadt k\u00fd h\u1ec7 th\u1ed1ng ho\u1eb7c t\u1eaft c\u1ed5ng giao di\u1ec7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh vi t\u01b0\u01a1ng th\u00edch thay \u0111\u1ed5i t\u00f9y theo nh\u00e0 cung c\u1ea5p v\u00e0 phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m. Do \u0111\u00f3, lu\u00f4n x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Danh s\u00e1ch c\u00e1c module quang h\u1ecdc \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t (n\u1ebfu c\u00f3 c\u00f4ng b\u1ed1)<\/p><\/li>\n\n\n\n<li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi phi\u00ean b\u1ea3n firmware<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c h\u1ed7 tr\u1ee3 ho\u1eb7c c\u1ea5u h\u00ecnh module quang h\u1ecdc b\u00ean th\u1ee9 ba<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e2n nh\u1eafc \u0111\u1ed1i v\u1edbi c\u00e1c m\u00f4-\u0111un BiDi c\u1ee7a b\u00ean th\u1ee9 ba<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi s\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un quang h\u1ecdc BiDi c\u1ee7a b\u00ean th\u1ee9 ba ho\u1eb7c t\u01b0\u01a1ng th\u00edch <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482793.htm\">Quang h\u1ecdc BiDi<\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o c\u00e1c tr\u01b0\u1eddng EEPROM \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u00fang cho n\u1ec1n t\u1ea3ng \u0111\u00edch<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn th\u00f4ng s\u1ed1 b\u01b0\u1edbc s\u00f3ng ph\u00f9 h\u1ee3p v\u1edbi c\u1eb7p b\u1ed5 sung y\u00eau c\u1ea7u<\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\" target=\"_blank\" rel=\"\">DOM<\/a> ch\u1ee9c n\u0103ng c\u00f3 th\u1ec3 truy c\u1eadp<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u01b0u l\u01b0\u1ee3ng th\u1ef1c t\u1ebf<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi m\u00f4-\u0111un \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n v\u1eadt l\u00fd, vi\u1ec7c m\u00e3 h\u00f3a sai c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb gi\u00e1m s\u00e1t ho\u1eb7c ph\u00e1t sinh c\u1ea3nh b\u00e1o h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a SFP hai chi\u1ec1u (Bidirectional): T\u1eebng b\u01b0\u1edbc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t quy tr\u00ecnh x\u00e1c th\u1ef1c c\u00f3 c\u1ea5u tr\u00fac gi\u00fap gi\u1ea3m r\u1ee7i ro tri\u1ec3n khai. Quy tr\u00ecnh l\u00e0m vi\u1ec7c \u0111\u00e3 \u0111\u01b0\u1ee3c k\u1ef9 s\u01b0 ki\u1ec3m ch\u1ee9ng sau \u0111\u00e2y \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 1 \u2014 X\u00e1c minh danh s\u00e1ch t\u01b0\u01a1ng th\u00edch<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra t\u00e0i li\u1ec7u t\u01b0\u01a1ng th\u00edch quang h\u1ecdc c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch\/b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 (1G, 10G, v.v.)<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn c\u1eb7p b\u01b0\u1edbc s\u00f3ng BiDi y\u00eau c\u1ea7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc n\u00e0y ng\u0103n ng\u1eeba vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 kh\u00f4ng c\u1ea7n thi\u1ebft v\u1ec1 sau.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 2 \u2014 Ch\u00e8n m\u00f4-\u0111un v\u00e0 \u0111\u1ecdc EEPROM<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi ch\u00e8n m\u00f4-\u0111un, x\u00e1c minh m\u00f4-\u0111un \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u0111\u00fang c\u00e1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ec7nh CLI ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interface transceiver<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nh\u1eadn di\u1ec7n nh\u00e0 cung c\u1ea5p ch\u00ednh x\u00e1c<\/p><\/li>\n\n\n\n<li><p>S\u1ed1 ph\u1ee5 t\u00f9ng ch\u00ednh x\u00e1c<\/p><\/li>\n\n\n\n<li><p>B\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 th\u00f4ng b\u00e1o l\u1ed7i ho\u1eb7c \u201ckh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d trong nh\u1eadt k\u00fd<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu m\u00f4-\u0111un kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n, h\u00e3y ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch firmware.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 3 \u2014 X\u00e1c minh DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu m\u00f4-\u0111un h\u1ed7 tr\u1ee3 DOM theo ti\u00eau chu\u1ea9n SFF-8472, h\u00e3y x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang ph\u00e1t (Tx)<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang thu (Rx)<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9 module<\/p><\/li>\n\n\n\n<li><p>\u0110i\u1ec7n \u00e1p cung c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ki\u1ec3m tra k\u1ef9 thu\u1eadt \u0111\u1ec1 xu\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Tx n\u1eb1m trong ph\u1ea1m vi do nh\u00e0 cung c\u1ea5p quy \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Rx cao h\u01a1n ng\u01b0\u1ee1ng nh\u1ea1y c\u1ea3m c\u1ee7a b\u1ed9 thu<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t Rx th\u1ea5p h\u01a1n gi\u1edbi h\u1ea1n qu\u00e1 t\u1ea3i<\/p><\/li>\n\n\n\n<li><p>Nhi\u1ec7t \u0111\u1ed9 n\u1eb1m trong ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng (th\u01b0\u1eddng l\u00e0 0\u201370\u00b0C \u0111\u1ed1i v\u1edbi lo\u1ea1i th\u01b0\u01a1ng m\u1ea1i)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn v\u00ed d\u1ee5 (gi\u00e1 tr\u1ecb thay \u0111\u1ed5i t\u00f9y theo m\u1eabu):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 nh\u1ea1y Rx: kho\u1ea3ng \u221214 dBm (v\u00ed d\u1ee5 cho l\u1edbp 1G, kho\u1ea3ng c\u00e1ch 10 km)<\/p><\/li>\n\n\n\n<li><p>Qu\u00e1 t\u1ea3i Rx: kho\u1ea3ng \u22123 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 \u0111\u1ec3 bi\u1ebft c\u00e1c ng\u01b0\u1ee1ng ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 4 \u2014 X\u00e1c minh vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o r\u1eb1ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng ph\u00e1t (Tx) t\u1ea1i \u0111\u1ea7u A kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng thu (Rx) t\u1ea1i \u0111\u1ea7u B<\/p><\/li>\n\n\n\n<li><p>B\u01b0\u1edbc s\u00f3ng ph\u00e1t (Tx) t\u1ea1i \u0111\u1ea7u B kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng thu (Rx) t\u1ea1i \u0111\u1ea7u A<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu li\u00ean k\u1ebft kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng c\u00e1c m\u00f4-\u0111un v\u1eabn \u0111\u01b0\u1ee3c nh\u1eadn di\u1ec7n, th\u00ec vi\u1ec7c kh\u00f4ng kh\u1edbp b\u01b0\u1edbc s\u00f3ng l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 5 \u2014 X\u00e1c nh\u1eadn vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra tr\u1ea1ng th\u00e1i giao di\u1ec7n:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interface status<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft \u0111ang b\u1eadt (up)<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 b\u1ed9 \u0111\u1ebfm l\u1ed7i v\u01b0\u1ee3t m\u1ee9c<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng c\u00f3 s\u1ef1 ki\u1ec7n rung l\u1eafc (flapping) trong nh\u1eadt k\u00fd<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">B\u01b0\u1edbc 6 \u2014 Th\u1ef1c hi\u1ec7n ki\u1ec3m tra l\u01b0u l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi thi\u1ebft l\u1eadp li\u00ean k\u1ebft:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Truy\u1ec1n l\u01b0u l\u01b0\u1ee3ng th\u1ef1c qua li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>Gi\u00e1m s\u00e1t b\u1ed9 \u0111\u1ebfm l\u1ed7i (CRC, l\u1ed7i khung)<\/p><\/li>\n\n\n\n<li><p>Quan s\u00e1t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00f4ng su\u1ea5t nh\u1eadn (Rx) DOM theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Dao \u0111\u1ed9ng c\u00f4ng su\u1ea5t quang k\u00e9o d\u00e0i c\u00f3 th\u1ec3 cho th\u1ea5y ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang \u1edf m\u1ee9c gi\u1edbi h\u1ea1n ho\u1eb7c t\u1ed5n hao \u0111\u1ea7u n\u1ed1i qu\u00e1 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1eb9o:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n x\u00e1c th\u1ef1c th\u00f4ng tin EEPROM tr\u01b0\u1edbc khi tri\u1ec3n khai s\u1ea3n xu\u1ea5t<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra gi\u00e1 tr\u1ecb \u0111\u1ecdc DOM so v\u1edbi ng\u01b0\u1ee1ng trong b\u1ea3ng d\u1eef li\u1ec7u<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra d\u01b0\u1edbi t\u1ea3i l\u01b0u l\u01b0\u1ee3ng, kh\u00f4ng ch\u1ec9 \u1edf tr\u1ea1ng th\u00e1i li\u00ean k\u1ebft \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp (link-up)<\/p><\/li>\n\n\n\n<li><p>Ghi l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb c\u01a1 s\u1edf Tx\/Rx \u0111\u1ec3 ph\u1ee5c v\u1ee5 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 trong t\u01b0\u01a1ng lai<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c x\u00e1c th\u1ef1c t\u01b0\u01a1ng th\u00edch \u0111\u00fang c\u00e1ch \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ed9 thu ph\u00e1t BiDi SFP ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c r\u00e0ng bu\u1ed9c quang h\u1ecdc v\u00e0 firmware \u0111\u00e3 \u0111\u1ecbnh, gi\u1ea3m thi\u1ec3u r\u1ee7i ro v\u1eadn h\u00e0nh trong c\u00e1c tri\u1ec3n khai s\u1eed d\u1ee5ng m\u1ed9t s\u1ee3i quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 Danh s\u00e1ch ki\u1ec3m tra tri\u1ec3n khai &amp; kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 cho b\u1ed9 thu ph\u00e1t SFP hai chi\u1ec1u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai th\u00e0nh c\u00f4ng m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491458.htm\">M\u00f4-\u0111un SFP hai chi\u1ec1u<strong> <\/strong><\/a>ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c x\u00e1c th\u1ef1c k\u1ef7 lu\u1eadt. V\u00ec quang h\u1ecdc BiDi d\u1ef1a v\u00e0o c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung v\u00e0 logic ch\u1ea5p nh\u1eadn c\u1ee7a thi\u1ebft b\u1ecb ch\u1ee7, n\u00ean nh\u1eefng sai s\u00f3t c\u1ea5u h\u00ecnh nh\u1ecf c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c thi\u1ebft l\u1eadp li\u00ean k\u1ebft ngay c\u1ea3 khi ph\u1ea7n c\u1ee9ng v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510.jpg\" alt=\"SFP Bidirectional Transceiver Deployment Checklist &amp; Troubleshooting\" class=\"wp-image-3235\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/37745c94bab549bb8c82f4bb11463510-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch ki\u1ec3m tra tri\u1ec3n khai c\u00f3 c\u1ea5u tr\u00fac, ti\u1ebfp theo l\u00e0 h\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t &amp; danh s\u00e1ch ki\u1ec3m tra tri\u1ec3n khai<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">X\u00e1c nh\u1eadn lo\u1ea1i s\u1ee3i quang v\u00e0 t\u00ecnh tr\u1ea1ng v\u1eadt l\u00fd<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh li\u00ean k\u1ebft s\u1eed d\u1ee5ng <strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong> ch\u1ec9.<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn c\u1ea5p s\u1ee3i quang (OS1 \/ OS2) ph\u00f9 h\u1ee3p v\u1edbi kho\u1ea3ng c\u00e1ch m\u1ee5c ti\u00eau (10 km \/ 20 km \/ 40 km).<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i LC tr\u01b0\u1edbc khi c\u1eafm.<\/p><\/li>\n\n\n\n<li><p>\u0110o chi\u1ec1u d\u00e0i s\u1ee3i quang n\u1ebfu kh\u00f4ng ch\u1eafc ch\u1eafn.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un hai chi\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho s\u1ee3i quang \u0111\u01a1n mode (SMF) tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c tri\u1ec3n khai tr\u00ean s\u1ee3i quang \u0111a mode.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">X\u00e1c minh c\u1eb7p b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn b\u01b0\u1edbc s\u00f3ng ph\u00e1t (Tx) t\u1ea1i \u0110\u1ea7u A kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng nh\u1eadn (Rx) t\u1ea1i \u0110\u1ea7u B.<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn b\u01b0\u1edbc s\u00f3ng ph\u00e1t (Tx) t\u1ea1i \u0110\u1ea7u B kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng nh\u1eadn (Rx) t\u1ea1i \u0110\u1ea7u A.<\/p><\/li>\n\n\n\n<li><p>G\u1eafn nh\u00e3n v\u1eadt l\u00fd cho c\u00e1c m\u00f4-\u0111un (v\u00ed d\u1ee5: \u201c1310-TX\u201d v\u00e0 \u201c1490-TX\u201d) \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c gh\u00e9p sai b\u01b0\u1edbc s\u00f3ng l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y th\u1ea5t b\u1ea1i li\u00ean k\u1ebft trong c\u00e1c tri\u1ec3n khai BiDi.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">X\u00e1c th\u1ef1c nh\u1eadn d\u1ea1ng EEPROM<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi c\u1eafm m\u00f4-\u0111un:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn nh\u00e0 cung c\u1ea5p v\u00e0 m\u00e3 s\u1ed1 linh ki\u1ec7n ch\u00ednh x\u00e1c<\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn s\u1ef1 tu\u00e2n th\u1ee7 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra c\u1edd kh\u1ea3 n\u0103ng ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 (DOM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea5u tr\u00fac EEPROM tu\u00e2n theo Th\u1ecfa thu\u1eadn Ngu\u1ed3n \u0110a d\u1ea1ng SFF v\u00e0 ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong SFF-8472.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5 CLI:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>show interface transceiver<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng xu\u1ea5t hi\u1ec7n th\u00f4ng b\u00e1o n\u00e0o nh\u01b0 \u201ckh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3\u201d ho\u1eb7c \u201cb\u1ed9 thu ph\u00e1t kh\u00f4ng h\u1ee3p l\u1ec7\u201d.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">T\u00ednh to\u00e1n v\u00e0 X\u00e1c minh Ng\u00e2n s\u00e1ch Li\u00ean k\u1ebft<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi k\u00edch ho\u1ea1t s\u1ea3n xu\u1ea5t:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ef1 tr\u1eef s\u1eb5n c\u00f3 (dB) = C\u00f4ng su\u1ea5t \u0111\u1ea7u ra Tx \u2212 T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft \u2212 \u0110\u1ed9 nh\u1ea1y Rx<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>D\u1ef1 tr\u1eef \u2265 3 dB (\u0111\u1ec7m k\u1ef9 thu\u1eadt khuy\u1ebfn ngh\u1ecb)<\/p><\/li>\n\n\n\n<li><p>T\u1ed5n hao s\u1ee3i quang ph\u00f9 h\u1ee3p v\u1edbi b\u01b0\u1edbc s\u00f3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/p><\/li>\n\n\n\n<li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i h\u00e0n \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng bao gi\u1edd ch\u1ec9 d\u1ef1a v\u00e0o x\u1ebfp h\u1ea1ng kho\u1ea3ng c\u00e1ch danh \u0111\u1ecbnh.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">X\u00e1c minh Gi\u00e1 tr\u1ecb DOM<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t quang Tx n\u1eb1m trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang Rx cao h\u01a1n ng\u01b0\u1ee1ng \u0111\u1ed9 nh\u1ea1y<\/p><\/li>\n\n\n\n<li><p>C\u00f4ng su\u1ea5t quang Rx th\u1ea5p h\u01a1n ng\u01b0\u1ee1ng qu\u00e1 t\u1ea3i<\/p><\/li>\n\n\n\n<li><p>C\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ecdc \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ghi l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb DOM c\u01a1 s\u1edf (Tx, Rx, nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p) \u0111\u1ec3 so s\u00e1nh trong vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 sau n\u00e0y.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">X\u00e1c nh\u1eadn T\u01b0\u01a1ng th\u00edch Ph\u1ea7n m\u1ec1m\u56fa\u4ef6<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m\u56fa\u4ef6 c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch\/b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra danh s\u00e1ch t\u01b0\u01a1ng th\u00edch quang h\u1ecdc c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn c\u00e1c m\u00f4-\u0111un b\u00ean th\u1ee9 ba \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a c\u1ed5ng n\u1ebfu c\u00e1c tr\u01b0\u1eddng nh\u00e0 s\u1ea3n xu\u1ea5t trong EEPROM kh\u00f4ng kh\u1edbp v\u1edbi gi\u00e1 tr\u1ecb k\u1ef3 v\u1ecdng.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">G\u1eafn nh\u00e3n v\u00e0 Chi\u1ebfn l\u01b0\u1ee3c D\u1ef1 ph\u00f2ng<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t trong v\u1eadn h\u00e0nh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>G\u1eafn nh\u00e3n r\u00f5 r\u00e0ng c\u00e1c s\u1ee3i c\u00e1p quang v\u00e0 c\u1ed5ng<\/p><\/li>\n\n\n\n<li><p>G\u1eafn nh\u00e3n h\u01b0\u1edbng b\u01b0\u1edbc s\u00f3ng c\u1ee7a m\u00f4-\u0111un<\/p><\/li>\n\n\n\n<li><p>D\u1ef1 tr\u1eef c\u00e1c c\u1eb7p BiDi b\u1ed5 sung trong kho<\/p><\/li>\n\n\n\n<li><p>L\u01b0u tr\u1eef c\u00e1c c\u1eb7p c\u00f9ng nhau \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn gi\u1eefa hai ph\u00eda A\/B<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c g\u1eafn nh\u00e3n k\u00e9m th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn l\u1ed7i l\u1eb7p \u0111i l\u1eb7p l\u1ea1i trong gh\u00e9p n\u1ed1i b\u01b0\u1edbc s\u00f3ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 BiDi ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf \u0111i\u1ec3n h\u00ecnh k\u00e8m ph\u1ea3n h\u1ed3i k\u1ef9 thu\u1eadt tr\u1ef1c ti\u1ebfp.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 1: Li\u00ean k\u1ebft kh\u00f4ng thi\u1ebft l\u1eadp \u0111\u01b0\u1ee3c. \u0110i\u1ec1u \u0111\u1ea7u ti\u00ean c\u1ea7n ki\u1ec3m tra l\u00e0 g\u00ec?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t: c\u1eb7p b\u01b0\u1edbc s\u00f3ng sai.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh vi\u1ec7c gh\u00e9p n\u1ed1i Tx\/Rx \u1edf c\u1ea3 hai \u0111\u1ea7u<\/p><\/li>\n\n\n\n<li><p>Ho\u00e1n \u0111\u1ed5i m\u1ed9t m\u00f4-\u0111un b\u1eb1ng phi\u00ean b\u1ea3n b\u1ed5 sung t\u01b0\u01a1ng \u1ee9ng n\u1ebfu b\u1ecb gh\u00e9p sai<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn gi\u00e1 tr\u1ecb b\u01b0\u1edbc s\u00f3ng trong EEPROM qua CLI<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 2: Giao di\u1ec7n hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i \u201cerr-disabled\u201d ho\u1eb7c \u201cb\u1ed9 thu ph\u00e1t kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.\u201d<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng cao: ph\u1ea7n m\u1ec1m\u56fa\u4ef6 t\u1eeb ch\u1ed1i do ki\u1ec3m tra nh\u00e0 s\u1ea3n xu\u1ea5t trong EEPROM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra nh\u1eadt k\u00fd h\u1ec7 th\u1ed1ng (<code>hi\u1ec3n th\u1ecb nh\u1eadt k\u00fd<\/code>)<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn t\u00e0i li\u1ec7u t\u01b0\u01a1ng th\u00edch quang h\u1ecdc<\/p><\/li>\n\n\n\n<li><p>C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m\u56fa\u4ef6 n\u1ebfu c\u1ea7n thi\u1ebft<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng m\u00f4-\u0111un \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u00fang cho n\u1ec1n t\u1ea3ng c\u1ee5 th\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 3: C\u00f4ng su\u1ea5t Rx qu\u00e1 cao khi\u1ebfn li\u00ean k\u1ebft tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean nh\u00e2n: b\u1ed9 thu b\u1ecb qu\u00e1 t\u1ea3i (kho\u1ea3ng c\u00e1ch s\u1ee3i quang ng\u1eafn v\u1edbi m\u00f4-\u0111un t\u1ea7m xa).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh gi\u00e1 tr\u1ecb Rx DOM<\/p><\/li>\n\n\n\n<li><p>So s\u00e1nh v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt qu\u00e1 t\u1ea3i b\u1ed9 thu<\/p><\/li>\n\n\n\n<li><p>L\u1eafp b\u1ed9 suy hao quang n\u1ed1i ti\u1ebfp n\u1ebfu c\u1ea7n thi\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 t\u1ea3i b\u1ed9 thu th\u01b0\u1eddng x\u1ea3y ra khi tri\u1ec3n khai quang h\u1ecdc 20 km ho\u1eb7c 40 km tr\u00ean c\u00e1c \u0111o\u1ea1n s\u1ee3i quang r\u1ea5t ng\u1eafn.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 4: Th\u00f4ng tin DOM kh\u00f4ng hi\u1ec3n th\u1ecb.<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n kh\u1ea3 d\u0129:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00f4-\u0111un kh\u00f4ng h\u1ed7 tr\u1ee3 ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1<\/p><\/li>\n\n\n\n<li><p>S\u1ef1 c\u1ed1 giao ti\u1ebfp I\u00b2C<\/p><\/li>\n\n\n\n<li><p>H\u1ea1n ch\u1ebf ph\u1ea7n m\u1ec1m\u56fa\u4ef6<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn h\u1ed7 tr\u1ee3 DOM theo ti\u00eau chu\u1ea9n SFF-8472<\/p><\/li>\n\n\n\n<li><p>C\u1eafm l\u1ea1i m\u00f4-\u0111un<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 c\u1ee7a n\u1ec1n t\u1ea3ng<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">C\u00e2u h\u1ecfi 5: Li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng l\u1ed7i t\u0103ng l\u00ean khi c\u00f3 t\u1ea3i.<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n c\u00f3 kh\u1ea3 n\u0103ng cao:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch quang h\u1ecdc \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea7u n\u1ed1i b\u1ea9n<\/p><\/li>\n\n\n\n<li><p>T\u1ed5n th\u1ea5t m\u1ed1i n\u1ed1i qu\u00e1 cao<\/p><\/li>\n\n\n\n<li><p>L\u00e3o h\u00f3a s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e0nh \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ki\u1ec3m tra l\u1ea1i ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/p><\/li>\n\n\n\n<li><p>L\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i<\/p><\/li>\n\n\n\n<li><p>\u0110o \u0111\u1ed9 suy hao th\u1ef1c t\u1ebf<\/p><\/li>\n\n\n\n<li><p>So s\u00e1nh gi\u00e1 tr\u1ecb DOM \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u1edbi h\u1ed3 s\u01a1 tham chi\u1ebfu<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ghi ch\u00fa:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00e0nh c\u00f4ng c\u1ee7a vi\u1ec7c tri\u1ec3n khai BiDi ph\u1ee5 thu\u1ed9c v\u00e0o n\u0103m tr\u1ee5 c\u1ed9t:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>Lo\u1ea1i s\u1ee3i quang ph\u00f9 h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>Gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c<\/p><\/li>\n\n\n\n<li><p>Nh\u1eadn di\u1ec7n EEPROM h\u1ee3p l\u1ec7<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ee7 d\u1ef1 ph\u00f2ng quang h\u1ecdc<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c ch\u1ea5p nh\u1eadn firmware<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Khi nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c ki\u1ec3m tra m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng, c\u00e1c m\u00f4-\u0111un SFP BiDi cung c\u1ea5p k\u1ebft n\u1ed1i Ethernet qua s\u1ee3i quang \u0111\u01a1n \u1ed5n \u0111\u1ecbnh, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n v\u00e0 hi\u1ec7u n\u0103ng d\u1ef1 b\u00e1o \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 So s\u00e1nh BiDi v\u00e0 SFP hai s\u1ee3i quang ti\u00eau chu\u1ea9n: C\u00e1c y\u1ebfu t\u1ed1 chi ph\u00ed &amp; v\u1eadn h\u00e0nh<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ef1a ch\u1ecdn gi\u1eefa m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482784.htm\"><strong>SFP m\u1ed9t s\u1ee3i quang<\/strong><\/a><strong> (BiDi)<\/strong> v\u00e0 m\u1ed9t SFP ti\u00eau chu\u1ea9n <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475581.htm\"><strong>hai s\u1ee3i quang<\/strong><\/a> (Tx tr\u00ean m\u1ed9t s\u1ee3i, Rx tr\u00ean s\u1ee3i kh\u00e1c) kh\u00f4ng ch\u1ec9 l\u00e0 quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt thu\u1ea7n t\u00fay\u2014m\u00e0 c\u00f2n li\u00ean quan \u0111\u1ebfn chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u, r\u1ee7i ro v\u1eadn h\u00e0nh, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656.jpg\" alt=\"BiDi vs. Standard Dual-Fiber SFP: Cost &amp; Operational Tradeoffs\" class=\"wp-image-3236\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ac8530eaa2e44b219996ca174ef12656-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh c\u00f3 c\u1ea5u tr\u00fac d\u00e0nh cho \u0111\u00e1nh gi\u00e1 k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u (CapEx)<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u01afu th\u1ebf BiDi (trong m\u00f4i tr\u01b0\u1eddng thi\u1ebfu s\u1ee3i quang)<\/strong><\/p>\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>one fiber strand<\/strong> thay v\u00ec hai s\u1ee3i<\/p><\/li>\n\n\n\n<li><p>G\u1ea5p \u0111\u00f4i dung l\u01b0\u1ee3ng s\u1eed d\u1ee5ng tr\u00ean h\u1ec7 th\u1ed1ng s\u1ee3i quang hi\u1ec7n c\u00f3<\/p><\/li>\n\n\n\n<li><p>Gi\u1ea3m chi ph\u00ed trong c\u00e1c m\u00f4i tr\u01b0\u1eddng thu\u00ea s\u1ee3i quang ho\u1eb7c s\u1ee3i quang ch\u01b0a k\u00edch ho\u1ea1t (dark fiber)<\/p><\/li>\n\n\n\n<li><p>Tr\u00e1nh \u0111\u00e0o m\u1edbi ho\u1eb7c l\u1eafp \u0111\u1eb7t s\u1ee3i quang m\u1edbi<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng khan hi\u1ebfm s\u1ee3i quang (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fttx-technical-guide-modern-fiber-access-architectures\/\">FTTx<br><\/a>, v\u00f9ng l\u00f5i \u0111\u00f4 th\u1ecb, khu\u00f4n vi\u00ean c\u0169), kho\u1ea3n ti\u1ebft ki\u1ec7m do tr\u00e1nh tri\u1ec3n khai s\u1ee3i quang m\u1edbi th\u01b0\u1eddng l\u1edbn h\u01a1n chi ph\u00ed quang h\u1ecdc cao h\u01a1n m\u1ed9t ch\u00fat.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Chi ph\u00ed b\u1ed9 thu ph\u00e1t<br><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u01afu th\u1ebf c\u1ee7a SFP hai s\u1ee3i quang ti\u00eau chu\u1ea9n (chi ph\u00ed m\u00f4-\u0111un)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Th\u01b0\u1eddng c\u00f3 chi ph\u00ed quang h\u1ecdc tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb th\u1ea5p h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Kh\u1ea3 n\u0103ng s\u1eb5n c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng r\u1ed9ng h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Qu\u1ea3n l\u00fd t\u1ed3n kho \u0111\u01a1n gi\u1ea3n h\u01a1n (kh\u00f4ng c\u1ea7n gh\u00e9p c\u1eb7p A\/B)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un BiDi th\u01b0\u1eddng c\u00f3 gi\u00e1 cao h\u01a1n m\u1ed9t ch\u00fat do:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 l\u1ecdc WDM t\u00edch h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>Thi\u1ebft k\u1ebf b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung<\/p><\/li>\n\n\n\n<li><p>Kh\u1ed1i l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c module quang duplex ti\u00eau chu\u1ea9n 1310 nm<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Chi ph\u00ed v\u1eadn h\u00e0nh (OpEx)<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">L\u1eafp \u0111\u1eb7t &amp; v\u1eadn h\u00e0nh t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t \u0111\u1ed1i v\u1edbi quang hai chi\u1ec1u (BiDi)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Y\u00eau c\u1ea7u gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng nghi\u00eam ng\u1eb7t (A \u2194 B)<\/p><\/li>\n\n\n\n<li><p>R\u1ee7i ro l\u1eafp \u0111\u1eb7t sai cao h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Y\u00eau c\u1ea7u d\u00e1n nh\u00e3n v\u00e0 qu\u1ea3n l\u00fd t\u1ed3n kho c\u1ea9n tr\u1ecdng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 \u0111\u01a1n gi\u1ea3n c\u1ee7a c\u00e1p quang hai s\u1ee3i<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kh\u00f4ng lo ng\u1ea1i v\u1ec1 vi\u1ec7c gh\u00e9p c\u1eb7p b\u01b0\u1edbc s\u00f3ng<\/p><\/li>\n\n\n\n<li><p>Gi\u1ea3m r\u1ee7i ro gh\u00e9p sai<\/p><\/li>\n\n\n\n<li><p>Quy tr\u00ecnh thay th\u1ebf v\u00e0 ho\u00e1n \u0111\u1ed5i nhanh h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 ph\u1ee9c t\u1ea1p v\u1eadn h\u00e0nh th\u01b0\u1eddng cao h\u01a1n v\u1edbi BiDi tr\u1eeb khi c\u00e1c quy tr\u00ecnh \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Qu\u1ea3n l\u00fd t\u1ed3n kho &amp; ph\u1ee5 t\u00f9ng d\u1ef1 ph\u00f2ng<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482784.htm\">Module quang hai chi\u1ec1u (BiDi)<\/a> ph\u1ea3i \u0111\u01b0\u1ee3c d\u1ef1 tr\u1eef theo t\u1eebng c\u1eb7p b\u1ed5 sung cho nhau.<br>Th\u1ef1c ti\u1ec5n v\u1eadn h\u00e0nh t\u1ed1t nh\u1ea5t y\u00eau c\u1ea7u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>D\u1ef1 tr\u1eef b\u1eb1ng nhau cho m\u1ed7i bi\u1ebfn th\u1ec3 b\u01b0\u1edbc s\u00f3ng<\/p><\/li>\n\n\n\n<li><p>D\u00e1n nh\u00e3n r\u00f5 r\u00e0ng A\/B<\/p><\/li>\n\n\n\n<li><p>Ch\u00ednh s\u00e1ch gh\u00e9p c\u1eb7p ph\u1ee5 t\u00f9ng d\u1ef1 ph\u00f2ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Module quang hai s\u1ee3i \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd t\u1ed3n kho v\u00ec module gi\u1ed1ng nhau \u1edf c\u1ea3 hai \u0111\u1ea7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng &amp; l\u1eadp k\u1ebf ho\u1ea1ch v\u00f2ng \u0111\u1eddi<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u00e1p quang<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">BiDi c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ed1 s\u1ee3i c\u00e1p quang c\u1ed1 \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c m\u1edf r\u1ed9ng c\u00e1p quang t\u1ed1n k\u00e9m ho\u1eb7c kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c<\/p><\/li>\n\n\n\n<li><p>\u1ed0ng d\u1eabn hi\u1ec7n c\u00f3 \u0111\u00e3 \u0111\u1ea1t c\u00f4ng su\u1ea5t t\u1ed1i \u0111a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u00f4i tr\u01b0\u1eddng n\u00e0y, BiDi hi\u1ec7u qu\u1ea3 nh\u00e2n \u0111\u00f4i dung l\u01b0\u1ee3ng li\u00ean k\u1ebft logic m\u00e0 kh\u00f4ng c\u1ea7n c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1edbi.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Ti\u1ebfn h\u00f3a m\u1ea1ng d\u00e0i h\u1ea1n<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Module quang duplex ti\u00eau chu\u1ea9n cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ec7 sinh th\u00e1i t\u01b0\u01a1ng th\u00edch r\u1ed9ng h\u01a1n<\/p><\/li>\n\n\n\n<li><p>H\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i h\u01a1n t\u1eeb nhi\u1ec1u nh\u00e0 cung c\u1ea5p<\/p><\/li>\n\n\n\n<li><p>\u0110\u01b0\u1eddng d\u1eabn n\u00e2ng c\u1ea5p \u0111\u01a1n gi\u1ea3n h\u01a1n l\u00ean t\u1ed1c \u0111\u1ed9 cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai BiDi ph\u1ea3i xem x\u00e9t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebf ho\u1ea1ch b\u01b0\u1edbc s\u00f3ng trong t\u01b0\u01a1ng lai<\/p><\/li>\n\n\n\n<li><p>Qu\u1ea3n l\u00fd m\u00f4i tr\u01b0\u1eddng h\u1ed7n h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>X\u00e1c th\u1ef1c t\u00ednh t\u01b0\u01a1ng th\u00edch khi n\u00e2ng c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c y\u1ebfu t\u1ed1 ch\u1ea9n \u0111o\u00e1n &amp; gi\u00e1m s\u00e1t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 module SFP BiDi v\u00e0 duplex \u0111\u1ec1u c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1 (DOM) theo ti\u00eau chu\u1ea9n SFF-8472.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c kh\u00e1c bi\u1ec7t v\u1eadn h\u00e0nh bao g\u1ed3m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BiDi<br><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t s\u1ee3i c\u00e1p l\u00e0m cho vi\u1ec7c x\u00e1c \u0111\u1ecbnh l\u1ed7i tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p h\u01a1n m\u1ed9t ch\u00fat<\/p><\/li>\n\n\n\n<li><p>Kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 c\u1ed1 tr\u00ean s\u1ee3i v\u1eadt l\u00fd ri\u00eang bi\u1ec7t (\u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 nh\u1eadn chia s\u1ebb c\u00f9ng m\u1ed9t s\u1ee3i c\u00e1p)<\/p><\/li>\n\n\n\n<li><p>C\u00e1c t\u00ecnh hu\u1ed1ng qu\u00e1 t\u1ea3i \u0111\u01b0\u1eddng nh\u1eadn (Rx) ph\u1ed5 bi\u1ebfn h\u01a1n trong c\u00e1c tri\u1ec3n khai kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hai s\u1ee3i c\u00e1p<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>D\u1ec5 d\u00e0ng c\u00e1ch ly v\u1eadt l\u00fd gi\u1eefa \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 \u0111\u01b0\u1eddng nh\u1eadn<\/p><\/li>\n\n\n\n<li><p>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 tr\u1ef1c quan h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t ch\u1ea9n \u0111o\u00e1n, module quang duplex \u0111\u01a1n gi\u1ea3n h\u01a1n v\u1ec1 v\u1eadn h\u00e0nh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1ed3 s\u01a1 r\u1ee7i ro<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Y\u1ebfu t\u1ed1<br><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>BiDi<br><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Hai s\u1ee3i c\u00e1p<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng c\u00e1p quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Chi ph\u00ed m\u00f4-\u0111un<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u01a1i cao h\u01a1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lower<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>R\u1ee7i ro l\u1eafp \u0111\u1eb7t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao h\u01a1n (l\u1ed7i gh\u00e9p c\u1eb7p)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 ph\u1ee9c t\u1ea1p trong qu\u1ea3n l\u00fd t\u1ed3n kho<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng t\u1ea1i c\u00e1c \u0111\u1ecba \u0111i\u1ec3m thi\u1ebfu c\u00e1p quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Xu\u1ea5t s\u1eafc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u1ea1n ch\u1ebf<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 \u0111\u01a1n gi\u1ea3n trong kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Khi n\u00e0o n\u00ean ch\u1ecdn BiDi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488424.htm\">SFP hai chi\u1ec1u<\/a> th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0u ti\u00ean khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang b\u1ecb h\u1ea1n ch\u1ebf ho\u1eb7c \u0111\u1eaft \u0111\u1ecf<\/p><\/li>\n\n\n\n<li><p>N\u00e2ng c\u1ea5p c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang \u0111\u01a1n c\u0169<\/p><\/li>\n\n\n\n<li><p>M\u1edf r\u1ed9ng m\u1ea1ng truy c\u1eadp FTTx ho\u1eb7c m\u1ea1ng \u0111\u00f4 th\u1ecb<\/p><\/li>\n\n\n\n<li><p>Tr\u00e1nh chi ph\u00ed thi c\u00f4ng c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Khi n\u00e0o n\u00ean ch\u1ecdn SFP hai s\u1ee3i quang ti\u00eau chu\u1ea9n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quang h\u1ecdc hai s\u1ee3i th\u01b0\u1eddng ph\u00f9 h\u1ee3p h\u01a1n khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang d\u1ed3i d\u00e0o<\/p><\/li>\n\n\n\n<li><p>\u0110\u01a1n gi\u1ea3n h\u00f3a v\u1eadn h\u00e0nh l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u<\/p><\/li>\n\n\n\n<li><p>C\u00e1c tri\u1ec3n khai trung t\u00e2m d\u1eef li\u1ec7u quy m\u00f4 l\u1edbn y\u00eau c\u1ea7u c\u00e1c module \u0111\u1ed3ng nh\u1ea5t<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c gi\u1ea3m thi\u1ec3u l\u1ed7i l\u1eafp \u0111\u1eb7t l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">K\u1ebft lu\u1eadn k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quang h\u1ecdc BiDi t\u1ed1i \u01b0u h\u00f3a <strong>hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng s\u1ee3i quang<\/strong>, trong khi quang h\u1ecdc hai s\u1ee3i t\u1ed1i \u01b0u h\u00f3a <strong>t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 ti\u00eau chu\u1ea9n h\u00f3a trong v\u1eadn h\u00e0nh<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ef1a ch\u1ecdn \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c r\u00e0ng bu\u1ed9c c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng, m\u1ee9c \u0111\u1ed9 tr\u01b0\u1edfng th\u00e0nh trong v\u1eadn h\u00e0nh v\u00e0 chi\u1ebfn l\u01b0\u1ee3c m\u1edf r\u1ed9ng m\u1ea1ng d\u00e0i h\u1ea1n\u2014kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o gi\u00e1 ban \u0111\u1ea7u c\u1ee7a b\u1ed9 thu ph\u00e1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u23e9 G\u1ee3i \u00fd cu\u1ed1i c\u00f9ng v\u1ec1 b\u1ed9 thu ph\u00e1t hai chi\u1ec1u SFP v\u00e0 h\u01b0\u1edbng d\u1eabn tri\u1ec3n khai<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>B\u1ed9 thu ph\u00e1t hai chi\u1ec1u SFP<\/strong> tri\u1ec3n khai c\u00f3 th\u1ec3 mang l\u1ea1i l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3 v\u1ec1 hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng s\u1ee3i quang\u2014nh\u01b0ng ch\u1ec9 khi \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n k\u00e8m theo vi\u1ec7c ki\u1ec3m \u0111\u1ecbnh k\u1ef9 thu\u1eadt nghi\u00eam ng\u1eb7t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u00f3m t\u1eaft ng\u1eafn g\u1ecdn c\u00e1c khuy\u1ebfn ngh\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng th\u1ef1c t\u1ebf t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u00f3m t\u1eaft khuy\u1ebfn ngh\u1ecb k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ki\u1ec3m tra c\u00e1c y\u1ebfu t\u1ed1 n\u1ec1n t\u1ea3ng tr\u01b0\u1edbc khi k\u00edch ho\u1ea1t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c nh\u1eadn <strong>s\u1ee3i quang \u0111\u01a1n mode (OS1 \/ OS2)<\/strong> t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n\n\n\n<li><p>X\u00e1c minh c\u1eb7p <strong>b\u01b0\u1edbc s\u00f3ng b\u1ed5 sung (A \u2194 B)<\/strong><\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra c\u00e1c tr\u01b0\u1eddng EEPROM (nh\u00e0 s\u1ea3n xu\u1ea5t, b\u01b0\u1edbc s\u00f3ng, t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u)<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn ph\u1ea7n m\u1ec1m\u56fa\u4ef6 ch\u1ee7 ch\u1ea5p nh\u1eadn module<\/p><\/li>\n\n\n\n<li><p>T\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang v\u1edbi bi\u00ean d\u1ef1 ph\u00f2ng \u22653 dB<\/p><\/li>\n\n\n\n<li><p>Ghi l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb DOM ban \u0111\u1ea7u (Tx, Rx, nhi\u1ec7t \u0111\u1ed9)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng bao gi\u1edd ch\u1ec9 d\u1ef1a v\u00e0o kho\u1ea3ng c\u00e1ch danh \u0111\u1ecbnh (10 km \/ 20 km \/ 40 km). Ng\u00e2n s\u00e1ch quang v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c gh\u00e9p n\u1ed1i m\u1edbi quy\u1ebft \u0111\u1ecbnh t\u00ednh \u1ed5n \u0111\u1ecbnh th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eafc nh\u1edf v\u1ec1 vi\u1ec7c kh\u1edbp ph\u1ea7n m\u1ec1m\u56fa\u4ef6 v\u00e0 b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 tin c\u1eady c\u1ee7a BiDi ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o hai ki\u1ec3m so\u00e1t v\u1eadn h\u00e0nh:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">A. Tu\u00e2n th\u1ee7 b\u01b0\u1edbc s\u00f3ng<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u01b0\u1edbc s\u00f3ng ph\u00e1t t\u1ea1i \u0110\u1ea7u A ph\u1ea3i kh\u1edbp v\u1edbi b\u01b0\u1edbc s\u00f3ng thu t\u1ea1i \u0110\u1ea7u B<\/p><\/li>\n\n\n\n<li><p>C\u00e1c module ph\u1ea3i \u0111\u01b0\u1ee3c tri\u1ec3n khai theo t\u1eebng c\u1eb7p b\u1ed5 sung<\/p><\/li>\n\n\n\n<li><p>Lu\u00f4n x\u00e1c nh\u1eadn b\u01b0\u1edbc s\u00f3ng danh \u0111\u1ecbnh v\u00e0 dung sai th\u00f4ng qua \u0111\u1ecdc EEPROM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Sai l\u1ec7ch b\u01b0\u1edbc s\u00f3ng v\u1eabn l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y th\u1ea5t b\u1ea1i khi tri\u1ec3n khai.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">B. Ph\u1ea7n m\u1ec1m\u56fa\u4ef6 v\u00e0 m\u00e3 h\u00f3a nh\u00e0 s\u1ea3n xu\u1ea5t<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c minh phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m\u56fa\u4ef6 c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch\/b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn module tu\u00e2n th\u1ee7 Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n D\u1ea1ng nh\u1ecf (Small Form Factor Multi-Source Agreement)<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o h\u1ed7 tr\u1ee3 DOM theo ti\u00eau chu\u1ea9n SFF-8472<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a OUI v\u00e0 m\u00e3 s\u1ed1 linh ki\u1ec7n nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng \u00e1p d\u1ee5ng vi\u1ec7c x\u00e1c th\u1ef1c EEPROM nghi\u00eam ng\u1eb7t v\u00e0 c\u00f3 th\u1ec3 t\u1eeb ch\u1ed1i c\u00e1c b\u1ed9 quang h\u1ecdc b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c Th\u1ef1c h\u00e0nh T\u1ed1t nh\u1ea5t trong V\u1eadn h\u00e0nh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng \u0111\u1ea1t chu\u1ea9n s\u1ea3n xu\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>G\u1eafn nh\u00e3n r\u00f5 r\u00e0ng cho c\u00e1p quang v\u00e0 c\u1ed5ng<\/p><\/li>\n\n\n\n<li><p>B\u1ea3o qu\u1ea3n c\u00e1c m\u00f4-\u0111un b\u1ed5 sung c\u00f9ng nhau<\/p><\/li>\n\n\n\n<li><p>Duy tr\u00ec t\u1ed3n kho d\u1ef1 ph\u00f2ng c\u00e2n b\u1eb1ng (c\u1ea3 hai bi\u1ebfn th\u1ec3 b\u01b0\u1edbc s\u00f3ng)<\/p><\/li>\n\n\n\n<li><p>Ghi l\u1ea1i c\u00e1c gi\u00e1 tr\u1ecb DOM ban \u0111\u1ea7u sau khi l\u1eafp \u0111\u1eb7t<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ecbnh k\u1ef3 r\u00e0 so\u00e1t c\u00f4ng su\u1ea5t nh\u1eadn (Rx) so v\u1edbi ng\u01b0\u1ee1ng qu\u00e1 t\u1ea3i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng th\u1ef1c h\u00e0nh n\u00e0y gi\u00fap gi\u1ea3m th\u1eddi gian kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 ng\u0103n ng\u1eeba vi\u1ec7c v\u00f4 t\u00ecnh gh\u00e9p sai b\u01b0\u1edbc s\u00f3ng trong c\u00e1c kho\u1ea3ng th\u1eddi gian b\u1ea3o tr\u00ec.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ec1 xu\u1ea5t Chi\u1ebfn l\u01b0\u1ee3c Tri\u1ec3n khai<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ecdn BiDi khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00e0i nguy\u00ean s\u1ee3i quang b\u1ecb h\u1ea1n ch\u1ebf<\/p><\/li>\n\n\n\n<li><p>C\u1ea7n n\u00e2ng c\u1ea5p c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n c\u00f3<\/p><\/li>\n\n\n\n<li><p>Vi\u1ec7c m\u1edf r\u1ed9ng m\u1ea1ng \u0111\u00f4 th\u1ecb, khu\u00f4n vi\u00ean tr\u01b0\u1eddng ho\u1eb7c FTTx ph\u1ea3i tr\u00e1nh x\u00e2y d\u1ef1ng th\u00eam s\u1ee3i quang m\u1edbi<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ecdn b\u1ed9 quang h\u1ecdc hai s\u1ee3i khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang d\u1ed3i d\u00e0o<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 \u0111\u01a1n gi\u1ea3n trong v\u1eadn h\u00e0nh quan tr\u1ecdng h\u01a1n vi\u1ec7c ti\u1ebft ki\u1ec7m s\u1ee3i quang<\/p><\/li>\n\n\n\n<li><p>Qu\u1ea3n l\u00fd t\u1ed3n kho theo ti\u00eau chu\u1ea9n l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t tri\u1ec3n khai BiDi \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00fang c\u00e1ch s\u1ebd mang l\u1ea1i hi\u1ec7u qu\u1ea3 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng d\u00e0i h\u1ea1n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4.jpg\" alt=\"SFP Bidirectional Transceiver Recommendations\" class=\"wp-image-3237\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7828d6e8bdd0447b85d508749e8671a4-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u00e3 s\u1eb5n s\u00e0ng tri\u1ec3n khai B\u1ed9 chuy\u1ec3n \u0111\u1ed5i SFP hai chi\u1ec1u?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n c\u1ea7n c\u00e1c m\u00f4-\u0111un SFP BiDi \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ea7y \u0111\u1ee7, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n, c\u00f3 m\u00e3 h\u00f3a EEPROM \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 x\u00e1c th\u1ef1c t\u00ednh t\u01b0\u01a1ng th\u00edch, h\u00e3y kh\u00e1m ph\u00e1 danh m\u1ee5c s\u1ea3n ph\u1ea9m ch\u00ednh th\u1ee9c t\u1ea1i: <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o vi\u1ec7c tri\u1ec3n khai c\u1ee7a b\u1ea1n b\u1eaft \u0111\u1ea7u v\u1edbi c\u00e1c b\u1ed9 quang h\u1ecdc \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i \u0111\u00fang c\u00e1ch, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch firmware \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ec7u su\u1ea5t quang h\u1ecdc \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 SFP BiDi: t\u00ecm hi\u1ec3u c\u00e1c b\u1ed9 thu ph\u00e1t hai chi\u1ec1u tr\u00ean s\u1ee3i \u0111\u01a1n, gh\u00e9p b\u01b0\u1edbc s\u00f3ng, t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 c\u00e1c th\u1ef1c ti\u1ec5n tri\u1ec3n khai t\u1ed1t nh\u1ea5t.<\/p>","protected":false},"author":1,"featured_media":3238,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-3239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3239","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=3239"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3239\/revisions"}],"predecessor-version":[{"id":10770,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3239\/revisions\/10770"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3238"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}