{"id":3105,"date":"2025-03-24T09:52:19","date_gmt":"2025-03-24T09:52:19","guid":{"rendered":"https:\/\/commmesh.com\/?p=3105"},"modified":"2025-03-27T09:06:01","modified_gmt":"2025-03-27T09:06:01","slug":"fiber-cable-testing","status":"publish","type":"post","link":"https:\/\/commmesh.com\/vi\/fiber-cable-testing\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n nh\u1ea5t v\u1ec1 ki\u1ec3m tra c\u00e1p quang"},"content":{"rendered":"<p>H\u00ecnh \u1ea3nh <em>ki\u1ec3m tra c\u00e1p quang<\/em> nh\u01b0 xung ch\u1ea9n \u0111o\u00e1n c\u1ee7a m\u1ea1ng c\u00e1p quang\u2014m\u1ed9t qu\u00e1 tr\u00ecnh quan tr\u1ecdng \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u ch\u1ea3y li\u1ec1n m\u1ea1ch qua c\u00e1c s\u1ee3i m\u1ecfng h\u01a1n s\u1ee3i t\u00f3c ng\u01b0\u1eddi, gi\u1ed1ng nh\u01b0 m\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean \u0111i\u1ec1u ch\u1ec9nh m\u00e1y ch\u00ednh x\u00e1c. Trong m\u1ed9t th\u1ebf gi\u1edbi m\u00e0 c\u00e1p quang cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ecdi th\u1ee9 t\u1eeb b\u0103ng th\u00f4ng r\u1ed9ng d\u00e2n d\u1ee5ng \u0111\u1ebfn l\u01b0\u1edbi vi\u1ec5n th\u00f4ng to\u00e0n c\u1ea7u, <em>ki\u1ec3m tra s\u1ee3i quang<\/em> x\u00e1c minh hi\u1ec7u su\u1ea5t v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1, cho d\u00f9 \u0111\u00f3 l\u00e0 c\u00e0i \u0111\u1eb7t 20 km m\u1edbi hay li\u00ean k\u1ebft hi\u1ec7n c\u00f3 \u0111ang \u0111\u01b0\u1ee3c xem x\u00e9t. H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111i s\u00e2u v\u00e0o t\u1ea5t c\u1ea3 c\u00e1c c\u00f4ng c\u1ee5, ph\u01b0\u01a1ng ph\u00e1p v\u00e0 m\u1eb9o th\u1ef1c t\u1ebf, \u0111\u1ed3ng th\u1eddi l\u01b0u \u00fd r\u1eb1ng <a href=\"https:\/\/commmesh.com\/vi\/\" target=\"_blank\" rel=\"noreferrer noopener\">M\u1ea1ng l\u01b0\u1edbi giao ti\u1ebfp<\/a> cung c\u1ea5p thi\u1ebft b\u1ecb ki\u1ec3m tra OTDR h\u00e0ng \u0111\u1ea7u \u0111\u1ec3 th\u1ef1c hi\u1ec7n <em>ki\u1ec3m tra c\u00e1p quang<\/em> ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3, trang b\u1ecb cho c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean v\u00e0 k\u1ef9 s\u01b0 \u0111\u1ec3 duy tr\u00ec m\u1ea1ng l\u01b0\u1edbi m\u1ea1nh m\u1ebd.<\/p>\n\n\n\n<p>\u1ede trung t\u00e2m c\u1ee7a n\u00f3, <em>ki\u1ec3m tra c\u00e1p quang<\/em> \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 \u00e1nh s\u00e1ng truy\u1ec1n qua s\u1ee3i quang, \u0111o m\u1ee9c suy gi\u1ea3m t\u00edn hi\u1ec7u (v\u00ed d\u1ee5: suy gi\u1ea3m 0,2 dB\/km), ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i (v\u00ed d\u1ee5: suy gi\u1ea3m ch\u00e8n &lt;0,3 dB) v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u1ea5u tr\u00fac\u2014ch\u00eca kh\u00f3a cho ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (v\u00ed d\u1ee5: <a href=\"https:\/\/commmesh.com\/vi\/g657a1-vs-g657a2-vs-g652d\/\" target=\"_blank\" rel=\"noreferrer noopener\">G652D<\/a>) ho\u1eb7c s\u1ee3i \u0111a ch\u1ebf \u0111\u1ed9 (v\u00ed d\u1ee5: OM3). N\u00f3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n sau khi l\u1eafp \u0111\u1eb7t\u2014v\u00ed d\u1ee5: x\u00e1c nh\u1eadn li\u00ean k\u1ebft 15 km b\u1ecb m\u1ea5t &lt;6 dB\u2014ho\u1eb7c trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i nh\u01b0 m\u1ed1i n\u1ed1i 0,5 dB \u1edf 8 km, b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 OTDR ho\u1eb7c \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o lu\u1ed3ng d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao ki\u1ec3m tra c\u00e1p quang l\u1ea1i quan tr\u1ecdng<\/h2>\n\n\n\n<p><em>Ki\u1ec3m tra c\u00e1p quang<\/em> l\u00e0 kh\u00f4ng th\u1ec3 thi\u1ebfu v\u00ec n\u00f3 \u0111\u1ea3m b\u1ea3o tr\u1ef1c ti\u1ebfp \u0111\u1ed9 tin c\u1eady v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ea1ng. B\u1ecf qua n\u00f3, v\u00e0 m\u1ed9t c\u00e1p ch\u1ebf \u0111\u1ed9 \u0111\u01a1n d\u00e0i 15 km c\u00f3 th\u1ec3 che gi\u1ea5u m\u1ea5t m\u00e1t m\u1ed1i n\u1ed1i 1,5 dB \u1edf 10 km\u2014\u0111\u1ee7 \u0111\u1ec3 l\u00e0m suy gi\u1ea3m t\u00edn hi\u1ec7u 40G, d\u1eabn \u0111\u1ebfn vi\u1ec7c m\u1ea5t g\u00f3i tin trong VPN c\u1ee7a c\u00f4ng ty. Ki\u1ec3m tra gi\u00fap ki\u1ec3m so\u00e1t suy gi\u1ea3m\u2014v\u00ed d\u1ee5, 0,2 dB\/km c\u00f3 ngh\u0129a l\u00e0 3 dB tr\u00ean 15 km, ph\u00f9 h\u1ee3p v\u1edbi ng\u00e2n s\u00e1ch 17 dB\u2014v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c \u0111\u1ea7u n\u1ed1i kh\u00f4ng l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u\u2014v\u00ed d\u1ee5, m\u1ea5t m\u00e1t 0,4 dB t\u1eeb SC\/APC b\u1ea9n c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n lu\u1ed3ng tr\u1ef1c ti\u1ebfp. Ph\u00e1t hi\u1ec7n s\u1edbm th\u00f4ng qua <em>ki\u1ec3m tra s\u1ee3i quang<\/em> tr\u00e1nh t\u00ecnh tr\u1ea1ng m\u1ea5t k\u1ebft n\u1ed1i\u2014h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t ng\u00e2n h\u00e0ng m\u1ea5t k\u1ebft n\u1ed1i gi\u1eefa ch\u1eebng khi \u0111ang giao d\u1ecbch do \u0111\u01b0\u1eddng truy\u1ec1n ch\u01b0a \u0111\u01b0\u1ee3c ki\u1ec3m tra.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1.jpg\" alt=\"s\u1ee3i quang 1\" class=\"wp-image-3014\" srcset=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1.jpg 1000w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1-300x200.jpg 300w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1-768x512.jpg 768w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/fiber-optic-1-600x400.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption class=\"wp-element-caption\">s\u1ee3i quang 1<\/figcaption><\/figure>\n\n\n\n<p>H\u01a1n th\u1ebf n\u1eefa, <em>ki\u1ec3m tra c\u00e1p quang<\/em> xu\u1ea5t s\u1eafc trong vi\u1ec7c ph\u00e1t hi\u1ec7n l\u1ed7i. M\u1ed9t OTDR c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n ra m\u1ed9t \u0111i\u1ec3m \u0111\u1ee9t c\u00e1ch 4 km trong m\u1ed9t \u0111o\u1ea1n \u0111\u01b0\u1eddng d\u00e0i 12 km\u2014v\u00ed d\u1ee5, t\u1eeb m\u1ed9t v\u1ebft c\u1eaft x\u00e2y d\u1ef1ng\u2014ho\u1eb7c m\u1ed9t \u0111\u01b0\u1eddng cong 0,2 dB tinh t\u1ebf \u1edf 8 km t\u1eeb m\u1ed9t s\u1ee3i c\u00e1p b\u1ecb k\u1eb9p, \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u tr\u01b0\u1edbc khi n\u00f3 h\u1ecfng ho\u00e0n to\u00e0n. T\u1ea7m nh\u00ecn xa n\u00e0y ng\u0103n ng\u1eeba th\u1eddi gian ch\u1ebft t\u1ed1n k\u00e9m\u2014v\u00ed d\u1ee5, s\u1eeda l\u1ed7i 1 dB tr\u00e1nh \u0111\u01b0\u1ee3c s\u1ef1 c\u1ed1 trung t\u00e2m d\u1eef li\u1ec7u $20.000\u2014gi\u1eef cho m\u1ea1ng l\u01b0\u1edbi \u1ed5n \u0111\u1ecbnh v\u00e0 ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu \u0111\u1ec3 ki\u1ec3m tra c\u00e1p quang<\/h2>\n\n\n\n<p><em>Ki\u1ec3m tra s\u1ee3i quang<\/em> d\u1ef1a v\u00e0o thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng\u2014sau \u0111\u00e2y l\u00e0 nh\u1eefng g\u00ec b\u1ea1n c\u1ea7n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/commmesh.com\/vi\/what-is-otdr\/\" target=\"_blank\" rel=\"noreferrer noopener\">M\u00e1y \u0111o OTDR<\/a> (M\u00e1y \u0111o ph\u1ea3n x\u1ea1 quang h\u1ecdc mi\u1ec1n th\u1eddi gian):<\/strong> N\u1ec1n t\u1ea3ng c\u1ee7a <em>ki\u1ec3m tra c\u00e1p quang<\/em>, OTDR (OTDR) l\u1eadp b\u1ea3n \u0111\u1ed3 hi\u1ec7u su\u1ea5t b\u1eb1ng c\u00e1ch g\u1eedi xung \u00e1nh s\u00e1ng v\u00e0 ph\u00e2n t\u00edch ph\u1ea3n x\u1ea1\u2014v\u00ed d\u1ee5, theo d\u00f5i s\u1ee3i quang d\u00e0i 30 km \u0111\u1ec3 hi\u1ec3n th\u1ecb 0,2 dB\/km, m\u1ed1i n\u1ed1i 0,15 dB \u1edf 12 km v\u00e0 \u0111\u1ee9t \u1edf 25 km (\u0111\u1ed9 ch\u00ednh x\u00e1c \u00b11 m). D\u1ea3i \u0111\u1ed9ng 40 dB bao ph\u1ee7 ~200 km \u1edf 0,2 dB\/km\u2014l\u00fd t\u01b0\u1edfng \u0111\u1ec3 ki\u1ec3m tra c\u00e0i \u0111\u1eb7t ho\u1eb7c t\u00ecm l\u1ed7i. CommMesh cung c\u1ea5p OTDR ch\u1ea5t l\u01b0\u1ee3ng cao\u2014v\u00ed d\u1ee5, c\u00e1c \u0111\u01a1n v\u1ecb $5000 v\u1edbi d\u1ea3i 45 dB\u2014\u0111\u1ec3 ki\u1ec3m tra ch\u00ednh x\u00e1c.<\/li>\n\n\n\n<li><strong>M\u00e1y \u0111o c\u00f4ng su\u1ea5t quang v\u00e0 ngu\u1ed3n s\u00e1ng:<\/strong> C\u1eb7p $500 n\u00e0y \u0111o t\u1ed5ng m\u1ee9c suy hao\u2014v\u00ed d\u1ee5, m\u1ed9t ngu\u1ed3n \u1edf -5 dBm (1310 nm) v\u00e0 ch\u1ec9 s\u1ed1 \u0111\u1ecdc c\u1ee7a m\u00e1y \u0111o -6,5 dBm tr\u00ean 5 km cho th\u1ea5y m\u1ee9c suy hao 1,5 dB (0,3 dB\/km). N\u00f3 nhanh ch\u00f3ng \u0111\u1ec3 x\u00e1c th\u1ef1c c\u00e1c li\u00ean k\u1ebft\u2014v\u00ed d\u1ee5, m\u1ed9t b\u1ea3n v\u00e1 1 km b\u1ecb m\u1ea5t &lt;0,5 dB\u2014ho\u1eb7c ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i\u2014v\u00ed d\u1ee5, 0,2 dB tr\u00ean <a href=\"https:\/\/commmesh.com\/vi\/product\/lc-connector\/\" target=\"_blank\" rel=\"noreferrer noopener\">LC<\/a> \u0111\u00f4i.<\/li>\n\n\n\n<li><strong>Thi\u1ebft b\u1ecb \u0111\u1ecbnh v\u1ecb l\u1ed7i th\u1ecb gi\u00e1c (VFL):<\/strong> Tia laser \u0111\u1ecf $50 l\u00e0m n\u1ed5i b\u1eadt c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y\u2014v\u00ed d\u1ee5, v\u1ebft n\u1ee9t \u1edf \u0111\u1ed9 cao 100m s\u1ebd ph\u00e1t s\u00e1ng m\u00e0u \u0111\u1ecf\u2014ho\u00e0n h\u1ea3o cho vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ea7m g\u1ea7n.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator.jpg\"><img decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-1024x1024.jpg\" alt=\"M\u00e1y \u0111\u1ecbnh v\u1ecb l\u1ed7i th\u1ecb gi\u00e1c (VFL)\" class=\"wp-image-3121\" style=\"width:800px\" srcset=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-1024x1024.jpg 1024w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-300x300.jpg 300w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-150x150.jpg 150w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-768x768.jpg 768w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-600x600.jpg 600w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator-100x100.jpg 100w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Visual-Fault-Locator.jpg 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">M\u00e1y \u0111\u1ecbnh v\u1ecb l\u1ed7i th\u1ecb gi\u00e1c (VFL)<\/figcaption><\/figure>\n\n\n\n<p>Nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0y th\u00fac \u0111\u1ea9y hi\u1ec7u qu\u1ea3 <em>ki\u1ec3m tra c\u00e1p quang<\/em>\u2014M\u00e1y \u0111o OTDR c\u1ee7a CommMesh \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t \u0111\u1ed1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra s\u1ee3i quang<\/h2>\n\n\n\n<p><em>Ki\u1ec3m tra c\u00e1p quang<\/em> s\u1eed d\u1ee5ng nhi\u1ec1u k\u1ef9 thu\u1eadt kh\u00e1c nhau \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3. Ki\u1ec3m tra \u0111\u1ea7u cu\u1ed1i v\u1edbi \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t v\u00e0 ngu\u1ed3n s\u00e1ng \u0111o t\u1ed5ng m\u1ee9c suy hao\u2014li\u00ean k\u1ebft 10 km c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u \u1edf m\u1ee9c -5 dBm v\u00e0 k\u1ebft th\u00fac \u1edf m\u1ee9c -7 dBm, cho th\u1ea5y m\u1ee9c suy hao 2 dB (0,2 dB\/km c\u1ed9ng v\u1edbi \u0111\u1ea7u n\u1ed1i 0,2 dB), ph\u00f9 h\u1ee3p v\u1edbi ng\u00e2n s\u00e1ch 10G l\u00e0 17 dB. Nhanh ch\u00f3ng\u201410-15 ph\u00fat\u2014v\u00e0 ph\u00f9 h\u1ee3p \u0111\u1ec3 x\u00e1c minh hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 sau khi c\u00e0i \u0111\u1eb7t\u2014v\u00ed d\u1ee5: li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u d\u00e0i 2 km \u0111\u1ea1t m\u1ee9c suy hao 0,4 dB\u2014ho\u1eb7c ki\u1ec3m tra sau khi s\u1eeda ch\u1eefa\u2014v\u00ed d\u1ee5: \u0111\u01b0\u1eddng ch\u1ea1y 5 km \u0111\u00e3 v\u00e1 gi\u1eef \u1ed5n \u0111\u1ecbnh. V\u00ed d\u1ee5: k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 ki\u1ec3m tra li\u00ean k\u1ebft khu\u00f4n vi\u00ean tr\u01b0\u1eddng d\u00e0i 3 km, x\u00e1c nh\u1eadn m\u1ee9c suy hao t\u1ed5ng 0,6 dB ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt\u2014\u0111\u1ea3m b\u1ea3o v\u00f9ng ph\u1ee7 s\u00f3ng Wi-Fi li\u1ec1n m\u1ea1ch.<\/p>\n\n\n\n<p>Ph\u00e2n kh\u00fac theo t\u1eebng ph\u00e2n kh\u00fac <em>ki\u1ec3m tra s\u1ee3i quang<\/em> v\u1edbi OTDR cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc h\u01a1n, ph\u00e2n t\u00edch c\u00e1c ph\u1ea7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed l\u1ed7i ch\u00ednh x\u00e1c. OTDR $6000 qu\u00e9t s\u1ee3i quang d\u00e0i 40 km\u2014v\u00ed d\u1ee5, ph\u00e1t hi\u1ec7n \u0111\u01b0\u1eddng c\u01a1 s\u1edf 0,2 dB\/km, m\u1ed1i n\u1ed1i 0,1 dB \u1edf 8 km, u\u1ed1n cong 0,3 dB \u1edf 20 km v\u00e0 \u0111\u1ee9t 2 dB \u1edf 35 km\u2014s\u1eed d\u1ee5ng xung 10 ns \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c s\u1ef1 ki\u1ec7n c\u00e1ch nhau 150m. V\u1edbi c\u00e1p kh\u1edfi ch\u1ea1y d\u00e0i 500m, m\u1ea5t 20-30 ph\u00fat\u2014v\u00ed d\u1ee5, l\u1eadp b\u1ea3n \u0111\u1ed3 li\u00ean k\u1ebft n\u00f4ng th\u00f4n d\u00e0i 25 km \u0111\u1ec3 t\u00ecm m\u1ea5t m\u1ed1i n\u1ed1i 0,15 dB \u1edf 15 km t\u1eeb m\u1ed9t c\u00e0i \u0111\u1eb7t v\u1ed9i v\u00e0ng ho\u1eb7c l\u1ed7i 1 dB \u1edf 22 km t\u1eeb m\u1ed9t nh\u00e1nh c\u00e2y \u0111\u1ed5, h\u01b0\u1edbng d\u1eabn c\u00e1c b\u1ea3n s\u1eeda l\u1ed7i c\u00f3 m\u1ee5c ti\u00eau. C\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o <em>ki\u1ec3m tra c\u00e1p quang<\/em> l\u00e0 to\u00e0n di\u1ec7n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source.jpg\"><img decoding=\"async\" width=\"1024\" height=\"817\" src=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source-1024x817.jpg\" alt=\"M\u00e1y \u0111o c\u00f4ng su\u1ea5t quang v\u00e0 ngu\u1ed3n s\u00e1ng\" class=\"wp-image-3124\" style=\"width:800px\" srcset=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source-1024x817.jpg 1024w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source-300x239.jpg 300w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source-768x613.jpg 768w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source-600x479.jpg 600w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/Optical-Power-Meter-and-Light-Source.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">M\u00e1y \u0111o c\u00f4ng su\u1ea5t quang v\u00e0 ngu\u1ed3n s\u00e1ng<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Quy tr\u00ecnh ki\u1ec3m tra c\u00e1p quang t\u1eebng b\u01b0\u1edbc<\/h2>\n\n\n\n<p>\u0110ang ch\u1ea1y <em>ki\u1ec3m tra c\u00e1p quang<\/em> \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac\u2014sau \u0111\u00e2y l\u00e0 c\u00e1ch th\u1ef1c hi\u1ec7n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Chu\u1ea9n b\u1ecb cho th\u1eed nghi\u1ec7m s\u1ee3i quang<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chu\u1ea9n b\u1ecb d\u1ee5ng c\u1ee5: OTDR (v\u00ed d\u1ee5: t\u1eeb CommMesh), \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t, ngu\u1ed3n s\u00e1ng, b\u1ed9 d\u1ee5ng c\u1ee5 v\u1ec7 sinh $50.<\/li>\n\n\n\n<li>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i: S\u1eed d\u1ee5ng kh\u0103n lau c\u1ed3n ($10) v\u00e0 ch\u1ea5t t\u1ea9y r\u1eeda \u0111\u1ec3 lo\u1ea1i b\u1ecf b\u1ee5i kh\u1ecfi \u0111\u1ea7u SC\/APC\u2014v\u00ed d\u1ee5, tr\u00e1nh m\u1ea5t 0,5 dB do b\u1ee5i b\u1ea9n.<\/li>\n\n\n\n<li>Hi\u1ec7u ch\u1ec9nh: \u0110\u1eb7t OTDR \u1edf 1550 nm v\u00e0 \u0111\u01b0a v\u1ec1 0; \u0111\u1ea3m b\u1ea3o \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t \u0111\u1ecdc ch\u00ednh x\u00e1c -5 dBm\u2014v\u00ed d\u1ee5, \u0111\u1ed9 l\u1ec7ch 0,1 dB s\u1ebd l\u00e0m l\u1ec7ch d\u1eef li\u1ec7u.<\/li>\n\n\n\n<li>Ki\u1ec3m tra: Ki\u1ec3m tra l\u00f5i b\u1eb1ng k\u00ednh hi\u1ec3n vi $20\u2014v\u00ed d\u1ee5, m\u1ed9t v\u1ebft x\u01b0\u1edbc s\u1ebd l\u00e0m m\u1ea5t 0,2 dB\u2014m\u1ea5t 15-30 ph\u00fat cho \u0111\u01b0\u1eddng li\u00ean k\u1ebft 20 km.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m c\u00e1p quang<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u1ebft n\u1ed1i: K\u1ebft n\u1ed1i m\u1ed9t OTDR v\u1edbi c\u00e1p ph\u00f3ng d\u00e0i 1 km v\u00e0o s\u1ee3i quang d\u00e0i 15 km\u2014v\u00ed d\u1ee5, tr\u00e1nh v\u00f9ng ch\u1ebft d\u00e0i 10m.<\/li>\n\n\n\n<li>Ki\u1ec3m tra: Qu\u00e9t OTDR cho th\u1ea5y 0,2 dB\/km, m\u1ed1i n\u1ed1i 0,25 dB \u1edf 10 km; \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t\/ngu\u1ed3n x\u00e1c nh\u1eadn t\u1ed5ng suy hao 3 dB\u2014v\u00ed d\u1ee5, kh\u1edbp trong ph\u1ea1m vi 0,2 dB.<\/li>\n\n\n\n<li>Ghi l\u1ea1i: Ghi l\u1ea1i \u201c15 km, 3 dB, 2 m\u1ed1i n\u1ed1i\u201d v\u00e0o m\u00e1y t\u00ednh x\u00e1ch tay ho\u1eb7c ph\u1ea7n m\u1ec1m OTDR\u2014v\u00ed d\u1ee5: xu\u1ea5t USB\u2014m\u1ea5t 30-60 ph\u00fat.<\/li>\n<\/ul>\n\n\n\n<p>OTDR c\u1ee7a CommMesh c\u1ea3i thi\u1ec7n <em>ki\u1ec3m tra c\u00e1p quang<\/em>\u2014mang l\u1ea1i k\u1ebft qu\u1ea3 r\u00f5 r\u00e0ng, c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"643\" src=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR.jpg\" alt=\"M\u00e1y \u0111o OTDR\" class=\"wp-image-3127\" style=\"width:800px\" srcset=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR.jpg 1000w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR-300x193.jpg 300w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR-768x494.jpg 768w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/03\/OTDR-600x386.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption class=\"wp-element-caption\">M\u00e1y \u0111o OTDR<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m s\u1ee3i quang<\/h2>\n\n\n\n<p>Hi\u1ec3u bi\u1ebft <em>ki\u1ec3m tra c\u00e1p quang<\/em> d\u1eef li\u1ec7u l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 h\u00e0nh \u0111\u1ed9ng. M\u1ed9t d\u1ea5u v\u1ebft OTDR c\u1ee7a m\u1ed9t li\u00ean k\u1ebft 12 km c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb 0,2 dB\/km\u2014t\u1ed5ng c\u1ed9ng l\u00e0 2,4 dB\u2014c\u1ed9ng v\u1edbi 0,2 dB cho m\u1ed7i \u0111\u1ea7u n\u1ed1i (hai c\u1eb7p, 0,4 dB), t\u1ed5ng c\u1ed9ng l\u00e0 2,8 dB\u2014th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi ng\u00e2n s\u00e1ch 10G l\u00e0 17 dB. M\u1ed9t \u0111\u1ed9t bi\u1ebfn 1,5 dB \u1edf 6 km \u0111\u00e1nh d\u1ea5u m\u1ed9t m\u1ed1i n\u1ed1i x\u1ea5u\u2014v\u00ed d\u1ee5, c\u00e1c s\u1ee3i quang kh\u00f4ng th\u1eb3ng h\u00e0ng c\u1ea7n ph\u1ea3i n\u1ed1i l\u1ea1i trong 10 ph\u00fat b\u1eb1ng m\u00e1y n\u1ed1i $2000\u2014trong khi ph\u1ea3n x\u1ea1 to\u00e0n ph\u1ea7n \u1edf 10 km ch\u1ec9 ra m\u1ed9t s\u1ef1 \u0111\u1ee9t g\u00e3y\u2014v\u00ed d\u1ee5, m\u1ed9t v\u1ebft c\u1eaft do \u0111\u00e0o, c\u1ea7n ph\u1ea3i thay th\u1ebf 100m ($40). Ki\u1ec3m tra c\u00f4ng t\u01a1 \u0111i\u1ec7n\u2014v\u00ed d\u1ee5, t\u1ed5ng c\u1ed9ng l\u00e0 2,9 dB\u2014h\u1ed7 tr\u1ee3 \u0111i\u1ec1u n\u00e0y, nh\u01b0ng m\u1ed9t b\u1ea5t th\u01b0\u1eddng 0,6 dB \u1edf 4 km c\u00f3 th\u1ec3 b\u00e1o hi\u1ec7u m\u1ed9t s\u1ef1 u\u1ed1n cong\u2014v\u00ed d\u1ee5, t\u1eeb m\u1ed9t \u1ed1ng d\u1eabn ch\u1eb7t ch\u1ebd\u2014\u0111\u1ec3 s\u1eeda ch\u1eefa.<\/p>\n\n\n\n<p>X\u1eed l\u00fd s\u1ef1 c\u1ed1 d\u1ef1a tr\u00ean \u0111i\u1ec1u n\u00e0y\u2014v\u00ed d\u1ee5, gi\u1ea3m 2 dB \u1edf 18 km tr\u00ean li\u00ean k\u1ebft 25 km (ph\u1ea3n x\u1ea1 to\u00e0n ph\u1ea7n OTDR) x\u00e1c \u0111\u1ecbnh m\u1ed9t ph\u1ea7n b\u1ecb \u0111\u1ee9t ho\u1eb7c m\u1ed1i n\u1ed1i 0,3 dB \u1edf 5 km \u0111\u01b0\u1ee3c tinh ch\u1ec9nh th\u00e0nh 0,1 dB\u2014v\u00ed d\u1ee5, t\u0103ng bi\u00ean \u0111\u1ed9 c\u1ee7a li\u00ean k\u1ebft 40G. Trong tr\u01b0\u1eddng h\u1ee3p vi\u1ec5n th\u00f4ng, m\u1ea5t 1 dB \u1edf 15 km tr\u00ean \u0111\u01b0\u1eddng ch\u1ea1y 20 km\u2014\u0111\u01b0\u1ee3c theo d\u00f5i \u0111\u1ebfn m\u1ed9t \u0111i\u1ec3m b\u1ecb \u0111\u00e8 b\u1eb9p d\u01b0\u1edbi \u0111\u01b0\u1eddng\u2014\u0111\u01b0\u1ee3c v\u00e1 ($50), trong khi l\u1ed7i 0,5 dB \u1edf 3 km tr\u00ean li\u00ean k\u1ebft khu\u00f4n vi\u00ean tr\u01b0\u1eddng 10 km\u2014v\u00ed d\u1ee5, t\u1eeb m\u1ed9t m\u1ed1i n\u1ed1i l\u1ecfng l\u1ebbo\u2014\u0111\u01b0\u1ee3c th\u1eaft ch\u1eb7t sau khi \u0111i\u1ec1u ch\u1ec9nh. <em>Ki\u1ec3m tra s\u1ee3i quang<\/em> bi\u1ebfn d\u1eef li\u1ec7u th\u00e0nh b\u1ea3n s\u1eeda l\u1ed7i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng th\u00e1ch th\u1ee9c ph\u1ed5 bi\u1ebfn trong th\u1eed nghi\u1ec7m c\u00e1p quang<\/h2>\n\n\n\n<p><em>Ki\u1ec3m tra s\u1ee3i quang<\/em> ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng r\u00e0o c\u1ea3n c\u00f3 th\u1ec3 l\u00e0m m\u1edd k\u1ebft qu\u1ea3. Th\u1eddi ti\u1ebft \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ph\u00e9p \u0111o\u2014v\u00ed d\u1ee5, -30\u00b0C l\u00e0m t\u0103ng \u0111\u1ed9 suy gi\u1ea3m l\u00ean 0,23 dB\/km t\u1eeb 0,2 dB\/km \u1edf 20\u00b0C, t\u0103ng th\u00eam 0,3 dB tr\u00ean 10 km\u2014trong khi nhi\u1ec7t \u0111\u1ed9 (45\u00b0C) ho\u1eb7c b\u1ee5i tr\u00ean c\u00e1c \u0111\u1ea7u n\u1ed1i (v\u00ed d\u1ee5, m\u1ea5t m\u00e1t 0,3 dB) l\u00e0m m\u00e9o d\u1eef li\u1ec7u\u2014ki\u1ec3m tra trong nh\u00e0 ho\u1eb7c sau khi v\u1ec7 sinh (lau $10) s\u1ebd gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 n\u00e0y. C\u00e1c \u0111\u1ea7u b\u1ecb \u01b0\u1edbt m\u01b0a\u2014v\u00ed d\u1ee5, m\u1ea5t m\u00e1t th\u00eam 0,6 dB\u2014c\u1ea7n ph\u1ea3i s\u1ea5y kh\u00f4 v\u00e0 ki\u1ec3m tra l\u1ea1i.<\/p>\n\n\n\n<p>Gi\u1edbi h\u1ea1n thi\u1ebft b\u1ecb c\u0169ng ki\u1ec3m tra <em>ki\u1ec3m tra c\u00e1p quang<\/em>. M\u1ed9t OTDR $2000 (ph\u1ea1m vi 35 dB) m\u1edd d\u1ea7n sau 150 km\u2014v\u00ed d\u1ee5, nhi\u1ec5u che gi\u1ea5u m\u1ed1i n\u1ed1i 0,15 dB \u1edf 160 km\u2014trong khi v\u00f9ng ch\u1ebft 15m che gi\u1ea5u l\u1ed7i g\u1ea7n \u0111\u1ea7u\u2014v\u00ed d\u1ee5, m\u1ea5t k\u1ebft n\u1ed1i 0,2 dB \u1edf 10m. \u0110\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t tr\u00f4i\u2014v\u00ed d\u1ee5, m\u1ea5t 0,1 dB sau s\u00e1u th\u00e1ng\u2014c\u1ea7n hi\u1ec7u chu\u1ea9n l\u1ea1i $50. C\u00e1p kh\u1edfi ch\u1ea1y 1 km ho\u1eb7c OTDR cao c\u1ea5p (v\u00ed d\u1ee5, $8000, ph\u1ea1m vi 45 dB) kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 ki\u1ec3m tra c\u00e1p quang hi\u1ec7u qu\u1ea3<\/h2>\n\n\n\n<p>Th\u00e0nh c\u00f4ng trong <em>ki\u1ec3m tra s\u1ee3i quang<\/em> d\u1ef1a v\u00e0o c\u00e1c th\u00f3i quen th\u00f4ng minh. Ki\u1ec3m tra tr\u01b0\u1edbc, \u0111\u1ea3m b\u1ea3o s\u1ef1 s\u1eb5n s\u00e0ng\u2014l\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i b\u1eb1ng b\u1ed9 d\u1ee5ng c\u1ee5 $50 (v\u00ed d\u1ee5, m\u1ed9t v\u1ebft b\u1ea9n l\u00e0m t\u0103ng th\u00eam 0,3 dB m\u1ea5t m\u00e1t), s\u1ea1c OTDR (pin $50, 8 gi\u1edd) v\u00e0 kh\u1edbp c\u00e1c b\u01b0\u1edbc s\u00f3ng\u2014v\u00ed d\u1ee5, 1310 nm cho li\u00ean k\u1ebft 10G. Ki\u1ec3m tra m\u1ed9t b\u1ea3n v\u00e1 2 km \u0111\u00e3 bi\u1ebft\u2014v\u00ed d\u1ee5, m\u1ea5t 0,4 dB\u2014\u0111\u1ec3 x\u00e1c nh\u1eadn thi\u1ebft b\u1ecb, tr\u00e1nh \u0111\u1ecdc sai 10 km (v\u00ed d\u1ee5, m\u1ea5t 0,5 dB t\u1eeb pin ch\u1ebft)\u2014chu\u1ea9n b\u1ecb m\u1ea5t 15-20 ph\u00fat.<\/p>\n\n\n\n<p>Ki\u1ec3m tra sau, x\u00e1c minh c\u00e1c ph\u00e1t hi\u1ec7n\u2014ch\u1ea1y l\u1ea1i OTDR tr\u00ean li\u00ean k\u1ebft 25 km (v\u00ed d\u1ee5, m\u1ea5t 5 dB) v\u00e0 ki\u1ec3m tra ch\u00e9o v\u1edbi m\u00e1y \u0111o c\u00f4ng su\u1ea5t (5,2 dB)\u2014kho\u1ea3ng c\u00e1ch 0,2 dB l\u00e0 b\u00ecnh th\u01b0\u1eddng. C\u00e1c th\u00f4ng s\u1ed1 c\u1ee5 th\u1ec3 c\u1ee7a nh\u1eadt k\u00fd\u2014v\u00ed d\u1ee5, \u201c25 km, 5 dB, 4 m\u1ed1i n\u1ed1i, 1550 nm\u201d\u2014v\u00e0 l\u01b0u d\u1ea5u v\u1ebft (v\u00ed d\u1ee5, xu\u1ea5t USB OTDR)\u2014b\u1eaft \u0111\u01b0\u1ee3c m\u1ed1i n\u1ed1i 0,25 dB b\u1ecb b\u1ecf s\u00f3t gi\u00fap ti\u1ebft ki\u1ec7m vi\u1ec7c l\u00e0m l\u1ea1i. <em>Ki\u1ec3m tra c\u00e1p quang<\/em> \u0111\u00f2i h\u1ecfi s\u1ef1 si\u00eang n\u0103ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 cao nh\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">K\u1ebft lu\u1eadn: L\u00e0m ch\u1ee7 th\u1eed nghi\u1ec7m c\u00e1p quang<\/h2>\n\n\n\n<p><em>Ki\u1ec3m tra c\u00e1p quang<\/em> l\u00e0 \u0111\u01b0\u1eddng d\u00e2y c\u1ee9u sinh c\u1ee7a m\u1ea1ng c\u00e1p quang, \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u truy\u1ec1n \u0111i ho\u00e0n h\u1ea3o\u2014gi\u1ed1ng nh\u01b0 la b\u00e0n \u0111i\u1ec1u h\u01b0\u1edbng d\u1eef li\u1ec7u qua c\u01a1n b\u00e3o. H\u01b0\u1edbng d\u1eabn n\u00e0y \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ea5t c\u1ea3\u2014nh\u1eefng g\u00ec <em>ki\u1ec3m tra s\u1ee3i quang<\/em> \u0111\u00f2i h\u1ecfi, c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a n\u00f3. T\u1eeb m\u1ed9t b\u1ea3n v\u00e1 1 km \u0111\u1ebfn x\u01b0\u01a1ng s\u1ed1ng 60 km, <em>ki\u1ec3m tra c\u00e1p quang<\/em> v\u1edbi thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p s\u1ebd gi\u1eef cho m\u1ea1ng c\u1ee7a b\u1ea1n m\u1ea1nh m\u1ebd. Master <em>ki\u1ec3m tra c\u00e1p quang<\/em> v\u1edbi OTDR c\u1ee7a CommMesh ngay h\u00f4m nay v\u00e0 x\u00e2y d\u1ef1ng k\u1ebft n\u1ed1i l\u00e2u d\u00e0i!<\/p>","protected":false},"excerpt":{"rendered":"<p>Th\u1eed nghi\u1ec7m c\u00e1p quang nh\u01b0 m\u1ed9t xung ch\u1ea9n \u0111o\u00e1n c\u1ee7a m\u1ea1ng c\u00e1p quang\u2014m\u1ed9t qu\u00e1 tr\u00ecnh quan tr\u1ecdng \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u ch\u1ea3y li\u1ec1n m\u1ea1ch qua c\u00e1c s\u1ee3i m\u1ecfng h\u01a1n s\u1ee3i t\u00f3c c\u1ee7a con ng\u01b0\u1eddi, gi\u1ed1ng nh\u01b0 m\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean \u0111ang \u0111i\u1ec1u ch\u1ec9nh m\u1ed9t c\u1ed7 m\u00e1y ch\u00ednh x\u00e1c. Trong m\u1ed9t th\u1ebf gi\u1edbi m\u00e0 c\u00e1p quang cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho m\u1ecdi th\u1ee9, t\u1eeb b\u0103ng th\u00f4ng r\u1ed9ng d\u00e2n d\u1ee5ng \u0111\u1ebfn m\u1ea1ng l\u01b0\u1edbi vi\u1ec5n th\u00f4ng to\u00e0n c\u1ea7u, th\u1eed nghi\u1ec7m c\u00e1p quang x\u00e1c minh hi\u1ec7u su\u1ea5t v\u00e0 [\u2026]<\/p>","protected":false},"author":1,"featured_media":3014,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"34","_seopress_titles_title":"The Most Comprehensive Guide to Fiber Cable Testing","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-3105","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/comments?post=3105"}],"version-history":[{"count":13,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3105\/revisions"}],"predecessor-version":[{"id":3156,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3105\/revisions\/3156"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media\/3014"}],"wp:attachment":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media?parent=3105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/categories?post=3105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/tags?post=3105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}