{"id":1913,"date":"2026-07-29T04:44:32","date_gmt":"2026-07-29T04:44:32","guid":{"rendered":"https:\/\/viettelvtt.com\/?p=1913"},"modified":"2026-07-29T07:58:34","modified_gmt":"2026-07-29T07:58:34","slug":"den-los-do-viettel","status":"publish","type":"post","link":"https:\/\/viettelvtt.com\/den-los-do-viettel\/","title":{"rendered":"\u0110\u00e8n LOS \u0110\u1ecf Viettel L\u00e0 L\u1ed7i G\u00ec? C\u00e1ch X\u1eed L\u00fd An To\u00e0n"},"content":{"rendered":"<p><span style=\"font-family: 'times new roman', times, serif;\"><strong><a href=\"https:\/\/viettelvtt.com\/loi-internet-viettel\/\">\u0110\u00e8n LOS \u0111\u1ecf Viettel<\/a><\/strong> l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y modem GPON kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ho\u1eb7c \u0111ang nh\u1eadn t\u00edn hi\u1ec7u quang qu\u00e1 y\u1ebfu t\u1eeb h\u1ec7 th\u1ed1ng c\u1ee7a nh\u00e0 m\u1ea1ng. Khi l\u1ed7i xu\u1ea5t hi\u1ec7n, t\u00ean WiFi c\u00f3 th\u1ec3 v\u1eabn hi\u1ec3n th\u1ecb tr\u00ean \u0111i\u1ec7n tho\u1ea1i nh\u01b0ng thi\u1ebft b\u1ecb kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c Internet. M\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p to\u00e0n b\u1ed9 d\u1ecbch v\u1ee5 Internet v\u00e0 truy\u1ec1n h\u00ecnh s\u1eed d\u1ee5ng chung \u0111\u01b0\u1eddng c\u00e1p quang c\u0169ng b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Nguy\u00ean nh\u00e2n th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn d\u00e2y c\u00e1p quang b\u1ecb \u0111\u1ee9t, g\u1eadp, k\u00e9o c\u0103ng, \u0111\u1ea7u n\u1ed1i quang g\u1eb7p v\u1ea5n \u0111\u1ec1 ho\u1eb7c tuy\u1ebfn c\u00e1p b\u00ean ngo\u00e0i \u0111ang x\u1ea3y ra s\u1ef1 c\u1ed1. L\u1ed7i c\u0169ng c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n sau m\u01b0a l\u1edbn, thi c\u00f4ng, di chuy\u1ec3n modem ho\u1eb7c thay \u0111\u1ed5i v\u1ecb tr\u00ed \u0111\u1ed3 \u0111\u1ea1c trong nh\u00e0.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e2y kh\u00f4ng gi\u1ed1ng l\u1ed7i WiFi y\u1ebfu do \u0111\u1ee9ng xa modem. Khi LOS chuy\u1ec3n \u0111\u1ecf, vi\u1ec7c qu\u00ean m\u1ea1ng WiFi, \u0111\u1ed5i m\u1eadt kh\u1ea9u ho\u1eb7c ki\u1ec3m tra \u0111i\u1ec7n tho\u1ea1i th\u01b0\u1eddng kh\u00f4ng gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n ch\u00ednh. Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n quan s\u00e1t \u0111\u00fang tr\u1ea1ng th\u00e1i PON v\u00e0 LOS, ki\u1ec3m tra d\u00e2y t\u1eeb b\u00ean ngo\u00e0i r\u1ed3i b\u00e1o k\u1ef9 thu\u1eadt n\u1ebfu t\u00edn hi\u1ec7u kh\u00f4ng kh\u00f4i ph\u1ee5c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y gi\u1ea3i th\u00edch \u00fd ngh\u0129a c\u1ee7a \u0111\u00e8n LOS, nguy\u00ean nh\u00e2n modem Viettel m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 quy tr\u00ecnh x\u1eed l\u00fd an to\u00e0n tr\u01b0\u1edbc khi li\u00ean h\u1ec7 b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Mu\u0323c Lu\u0323c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Den_LOS_do_Viettel_la_loi_gi\" >\u0110\u00e8n LOS \u0111\u1ecf Viettel l\u00e0 l\u1ed7i g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Vi_sao_modem_Viettel_bao_den_LOS_do\" >V\u00ec sao modem Viettel b\u00e1o \u0111\u00e8n LOS \u0111\u1ecf?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Cach_xac_dinh_nguyen_nhan_den_LOS_do_tai_nha\" >C\u00e1ch x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n \u0111\u00e8n LOS \u0111\u1ecf t\u1ea1i nh\u00e0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Cach_xu_ly_den_LOS_do_Viettel_an_toan_theo_5_buoc\" >C\u00e1ch x\u1eed l\u00fd \u0111\u00e8n LOS \u0111\u1ecf Viettel an to\u00e0n theo 5 b\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Den_LOS_do_co_tu_sua_duoc_khong\" >\u0110\u00e8n LOS \u0111\u1ecf c\u00f3 t\u1ef1 s\u1eeda \u0111\u01b0\u1ee3c kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Khi_nao_can_lien_he_ky_thuat_Viettel\" >Khi n\u00e0o c\u1ea7n li\u00ean h\u1ec7 k\u1ef9 thu\u1eadt Viettel?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Cach_han_che_loi_LOS_do_tai_dien\" >C\u00e1ch h\u1ea1n ch\u1ebf l\u1ed7i LOS \u0111\u1ecf t\u00e1i di\u1ec5n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Cau_hoi_thuong_gap_ve_den_LOS_do_Viettel\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0111\u00e8n LOS \u0111\u1ecf Viettel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/viettelvtt.com\/den-los-do-viettel\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Den_LOS_do_Viettel_la_loi_gi\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS \u0111\u1ecf Viettel l\u00e0 l\u1ed7i g\u00ec?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1919\" aria-describedby=\"caption-attachment-1919\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1919\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-1-1.jpg\" alt=\"\u0110\u00e8n LOS \u0111\u1ecf Viettel b\u00e1o m\u1ea5t t\u00edn hi\u1ec7u quang\" width=\"800\" height=\"600\" title=\"\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-1-1.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-1-1-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-1-1-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1919\" class=\"wp-caption-text\">\u0110\u00e8n LOS \u0111\u1ecf Viettel b\u00e1o m\u1ea5t t\u00edn hi\u1ec7u quang<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">LOS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Loss of Signal, \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 t\u00ecnh tr\u1ea1ng m\u1ea5t t\u00edn hi\u1ec7u. Tr\u00ean modem ho\u1eb7c thi\u1ebft b\u1ecb ONT s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 GPON, \u0111\u00e8n LOS ph\u1ea3n \u00e1nh kh\u1ea3 n\u0103ng ti\u1ebfp nh\u1eadn t\u00edn hi\u1ec7u quang t\u1eeb m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Trong tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng th\u00f4ng th\u01b0\u1eddng, \u0111\u00e8n LOS th\u01b0\u1eddng t\u1eaft, \u0111\u00e8n PON s\u00e1ng \u1ed5n \u0111\u1ecbnh v\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp Internet. Khi LOS s\u00e1ng \u0111\u1ecf ho\u1eb7c nh\u1ea5p nh\u00e1y \u0111\u1ecf, modem c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u quang \u0111\u1ea1t y\u00eau c\u1ea7u. Viettel cho bi\u1ebft modem b\u00e1o \u0111\u1ecf t\u1ea1i PON ho\u1eb7c LOS th\u01b0\u1eddng c\u1ea7n ki\u1ec3m tra k\u1ef9 thu\u1eadt \u0111\u01b0\u1eddng truy\u1ec1n, trong \u0111\u00f3 c\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u1ed3m \u0111\u1ee9t c\u00e1p, suy hao quang v\u00e0 l\u1ed7i \u0111\u1ea7u n\u1ed1i.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110i\u1ec7n tho\u1ea1i v\u1eabn c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y t\u00ean WiFi v\u00ec ch\u1ee9c n\u0103ng ph\u00e1t s\u00f3ng kh\u00f4ng d\u00e2y c\u1ee7a modem ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp v\u1edbi t\u00edn hi\u1ec7u c\u00e1p quang. N\u00f3i c\u00e1ch kh\u00e1c, modem v\u1eabn ph\u00e1t ra m\u1ea1ng WiFi n\u1ed9i b\u1ed9 nh\u01b0ng kh\u00f4ng c\u00f3 k\u1ebft n\u1ed1i t\u1eeb modem \u0111\u1ebfn Internet.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Ph\u00e2n bi\u1ec7t \u0111\u00e8n LOS v\u00e0 \u0111\u00e8n PON<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">PON v\u00e0 LOS \u0111\u1ec1u li\u00ean quan \u0111\u1ebfn \u0111\u01b0\u1eddng truy\u1ec1n quang nh\u01b0ng th\u1ec3 hi\u1ec7n hai tr\u1ea1ng th\u00e1i kh\u00e1c nhau.<\/span><\/p>\n<table dir=\"ltr\" style=\"width: 52.358%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" data-sheets-root=\"1\" data-sheets-baot=\"1\">\n<colgroup>\n<col width=\"267\" \/>\n<col width=\"283\" \/>\n<col width=\"304\" \/><\/colgroup>\n<tbody>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n t\u00edn hi\u1ec7u<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">Tr\u1ea1ng th\u00e1i th\u01b0\u1eddng g\u1eb7p<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">\u00dd ngh\u0129a tham kh\u1ea3o<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">PON s\u00e1ng xanh \u1ed5n \u0111\u1ecbnh<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">B\u00ecnh th\u01b0\u1eddng<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">Modem \u0111\u00e3 nh\u1eadn v\u00e0 \u0111\u0103ng k\u00fd t\u00edn hi\u1ec7u quang<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">LOS t\u1eaft<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">B\u00ecnh th\u01b0\u1eddng<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng ph\u00e1t hi\u1ec7n t\u00ecnh tr\u1ea1ng m\u1ea5t t\u00edn hi\u1ec7u<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">LOS nh\u1ea5p nh\u00e1y \u0111\u1ecf<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">B\u1ea5t th\u01b0\u1eddng<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">Modem kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u quang \u1ed5n \u0111\u1ecbnh<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">LOS s\u00e1ng \u0111\u1ecf li\u00ean t\u1ee5c<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">B\u1ea5t th\u01b0\u1eddng<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u01b0\u1eddng quang c\u00f3 th\u1ec3 \u0111ang m\u1ea5t t\u00edn hi\u1ec7u<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">PON t\u1eaft, LOS \u0111\u1ecf<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">B\u1ea5t th\u01b0\u1eddng<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">C\u1ea7n ki\u1ec3m tra d\u00e2y, \u0111\u1ea7u n\u1ed1i ho\u1eb7c h\u1ea1 t\u1ea7ng<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">PON s\u00e1ng nh\u01b0ng kh\u00f4ng v\u00e0o m\u1ea1ng<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">Ch\u01b0a ch\u1eafc l\u00e0 l\u1ed7i LOS<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn k\u1ebft n\u1ed1i Internet ho\u1eb7c c\u1ea5u h\u00ecnh<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 31.1475%;\"><span style=\"font-family: 'times new roman', times, serif;\">Power t\u1eaft<\/span><\/td>\n<td style=\"width: 33.0211%;\"><span style=\"font-family: 'times new roman', times, serif;\">Modem kh\u00f4ng c\u00f3 ngu\u1ed3n<\/span><\/td>\n<td style=\"width: 49.6487%;\"><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra ngu\u1ed3n tr\u01b0\u1edbc khi k\u1ebft lu\u1eadn l\u1ed7i \u0111\u01b0\u1eddng quang<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Tr\u1ea1ng th\u00e1i v\u00e0 m\u00e0u \u0111\u00e8n c\u00f3 th\u1ec3 kh\u00e1c nhau \u0111\u00f4i ch\u00fat gi\u1eefa t\u1eebng m\u1eabu modem. V\u00ec v\u1eady, ng\u01b0\u1eddi d\u00f9ng n\u00ean t\u1eadp trung v\u00e0o t\u1ed5 h\u1ee3p t\u00edn hi\u1ec7u: LOS \u0111\u1ecf, PON kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb m\u1ea5t Internet.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n PON \u0111\u1ecf c\u00f3 gi\u1ed1ng \u0111\u00e8n LOS \u0111\u1ecf kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">M\u1ed9t s\u1ed1 ng\u01b0\u1eddi d\u00f9ng g\u1ecdi chung m\u1ecdi \u0111\u00e8n \u0111\u1ecf tr\u00ean modem l\u00e0 \u201cPON \u0111\u1ecf\u201d. Tuy nhi\u00ean, c\u1ea7n \u0111\u1ecdc \u0111\u00fang t\u00ean \u0111\u01b0\u1ee3c in b\u00ean c\u1ea1nh \u0111\u00e8n.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu \u0111\u00e8n \u0111\u1ecf n\u1eb1m t\u1ea1i v\u1ecb tr\u00ed LOS, modem \u0111ang c\u1ea3nh b\u00e1o m\u1ea5t ho\u1eb7c suy gi\u1ea3m t\u00edn hi\u1ec7u quang. N\u1ebfu \u0111\u00e8n b\u1ea5t th\u01b0\u1eddng n\u1eb1m t\u1ea1i PON, thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 ch\u01b0a \u0111\u0103ng k\u00fd \u0111\u01b0\u1ee3c v\u1edbi h\u1ec7 th\u1ed1ng GPON ho\u1eb7c \u0111ang g\u1eb7p v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 c\u1ea5u h\u00ecnh.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Trong c\u1ea3 hai tr\u01b0\u1eddng h\u1ee3p, ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 n\u00ean ki\u1ec3m tra ngu\u1ed3n, d\u00e2y v\u00e0 tr\u1ea1ng th\u00e1i thi\u1ebft b\u1ecb t\u1eeb b\u00ean ngo\u00e0i. Kh\u00f4ng n\u00ean t\u1ef1 thay \u0111\u1ed5i th\u00f4ng s\u1ed1 GPON, t\u00e0i kho\u1ea3n \u0111\u01b0\u1eddng truy\u1ec1n ho\u1eb7c c\u1ea5u h\u00ecnh quang.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf c\u00f3 ph\u1ea3i modem b\u1ecb h\u1ecfng kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ch\u01b0a ch\u1eafc. \u0110\u00e8n LOS \u0111\u1ecf th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn tuy\u1ebfn t\u00edn hi\u1ec7u n\u1eb1m tr\u01b0\u1edbc modem, bao g\u1ed3m d\u00e2y quang trong nh\u00e0, \u0111\u1ea7u n\u1ed1i, h\u1ed9p c\u00e1p v\u00e0 h\u1ea1 t\u1ea7ng c\u1ee7a nh\u00e0 m\u1ea1ng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Modem ch\u1ec9 n\u00ean \u0111\u01b0\u1ee3c nghi ng\u1edd h\u1ecfng khi k\u1ef9 thu\u1eadt vi\u00ean \u0111\u00e3 x\u00e1c nh\u1eadn t\u00edn hi\u1ec7u quang \u0111\u1ebfn v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t v\u1eabn b\u00ecnh th\u01b0\u1eddng nh\u01b0ng thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 ti\u1ebfp nh\u1eadn ho\u1eb7c x\u1eed l\u00fd t\u00edn hi\u1ec7u. V\u00ec v\u1eady, kh\u00f4ng n\u00ean t\u1ef1 mua modem m\u1edbi ngay khi nh\u00ecn th\u1ea5y \u0111\u00e8n LOS \u0111\u1ecf.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vi_sao_modem_Viettel_bao_den_LOS_do\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">V\u00ec sao modem Viettel b\u00e1o \u0111\u00e8n LOS \u0111\u1ecf?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1920\" aria-describedby=\"caption-attachment-1920\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1920 size-full\" title=\"Nguy\u00ean nh\u00e2n modem Viettel b\u00e1o \u0111\u00e8n LOS \u0111\u1ecf\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-2.jpg\" alt=\"Nguy\u00ean nh\u00e2n modem Viettel b\u00e1o \u0111\u00e8n LOS \u0111\u1ecf\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-2.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-2-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-2-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1920\" class=\"wp-caption-text\">Nguy\u00ean nh\u00e2n modem Viettel b\u00e1o \u0111\u00e8n LOS \u0111\u1ecf<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 nhi\u1ec1u nguy\u00ean nh\u00e2n khi\u1ebfn modem b\u00e1o LOS. M\u1ed9t s\u1ed1 x\u1ea3y ra ngay b\u00ean trong nh\u00e0, trong khi nh\u1eefng nguy\u00ean nh\u00e2n kh\u00e1c n\u1eb1m t\u1ea1i tuy\u1ebfn c\u00e1p ngo\u00e0i \u0111\u01b0\u1eddng ho\u1eb7c h\u1ec7 th\u1ed1ng OLT c\u1ee7a nh\u00e0 m\u1ea1ng.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">D\u00e2y c\u00e1p quang trong nh\u00e0 b\u1ecb \u0111\u1ee9t<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">D\u00e2y quang d\u1eabn t\u00edn hi\u1ec7u t\u1eeb h\u1ed9p c\u00e1p \u0111\u1ebfn modem c\u00f3 c\u1ea5u t\u1ea1o m\u1ea3nh v\u00e0 nh\u1ea1y v\u1edbi t\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc. D\u00e2y c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ee9t do chu\u1ed9t c\u1eafn, v\u1eadt n\u1eb7ng \u0111\u00e8 l\u00ean, c\u1eeda k\u1eb9p, tr\u1ebb nh\u1ecf k\u00e9o ho\u1eb7c qu\u00e1 tr\u00ecnh di chuy\u1ec3n \u0111\u1ed3 \u0111\u1ea1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Khi s\u1ee3i quang b\u00ean trong b\u1ecb \u0111\u1ee9t ho\u00e0n to\u00e0n, modem kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u v\u00e0 \u0111\u00e8n LOS th\u01b0\u1eddng chuy\u1ec3n \u0111\u1ecf. V\u1ebft h\u1ecfng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng nh\u00ecn th\u1ea5y r\u00f5 v\u00ec l\u1edbp v\u1ecf b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 c\u00f2n nguy\u00ean.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng th\u1ec3 n\u1ed1i d\u00e2y quang b\u1eb1ng c\u00e1ch xo\u1eafn hai \u0111\u1ea7u ho\u1eb7c d\u00f9ng b\u0103ng d\u00ednh nh\u01b0 d\u00e2y \u0111i\u1ec7n. Vi\u1ec7c s\u1eeda ch\u1eefa c\u1ea7n \u0111\u1ea7u n\u1ed1i v\u00e0 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 b\u1ea3o \u0111\u1ea3m m\u1ee9c suy hao n\u1eb1m trong gi\u1edbi h\u1ea1n ph\u00f9 h\u1ee3p.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">D\u00e2y quang b\u1ecb g\u1eadp ho\u1eb7c k\u00e9o c\u0103ng<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1p quang c\u00f3 th\u1ec3 ch\u01b0a \u0111\u1ee9t ho\u00e0n to\u00e0n nh\u01b0ng b\u1ecb g\u1eadp t\u1ea1i g\u00f3c qu\u00e1 h\u1eb9p, cu\u1ed9n th\u00e0nh v\u00f2ng nh\u1ecf ho\u1eb7c k\u00e9o c\u0103ng khi modem \u0111\u01b0\u1ee3c di chuy\u1ec3n. \u0110i\u1ec1u n\u00e0y l\u00e0m t\u00edn hi\u1ec7u b\u1ecb suy hao v\u00e0 c\u00f3 th\u1ec3 khi\u1ebfn LOS nh\u1ea5p nh\u00e1y.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">T\u00ecnh tr\u1ea1ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n sau khi ng\u01b0\u1eddi d\u00f9ng k\u00ea l\u1ea1i b\u00e0n, chuy\u1ec3n t\u1ee7, v\u1ec7 sinh khu v\u1ef1c \u0111\u1eb7t modem ho\u1eb7c c\u1ed1 k\u00e9o thi\u1ebft b\u1ecb sang v\u1ecb tr\u00ed kh\u00e1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1eddng d\u00e2y v\u00e0 gi\u1ea3i ph\u00f3ng v\u1eadt \u0111ang \u0111\u00e8 l\u00ean d\u00e2y. Tuy nhi\u00ean, kh\u00f4ng n\u00ean b\u1ebb ng\u01b0\u1ee3c, gi\u1eadt m\u1ea1nh ho\u1eb7c th\u00e1o \u0111\u1ea7u n\u1ed1i \u0111\u1ec3 ki\u1ec3m tra.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ea7u n\u1ed1i quang b\u1ecb l\u1ecfng ho\u1eb7c suy hao<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ea7u n\u1ed1i c\u00f3 nhi\u1ec7m v\u1ee5 \u0111\u01b0a t\u00edn hi\u1ec7u t\u1eeb d\u00e2y quang v\u00e0o c\u1ed5ng quang c\u1ee7a modem. N\u1ebfu \u0111\u1ea7u n\u1ed1i b\u1ecb l\u1ecfng, b\u1ea9n, sai v\u1ecb tr\u00ed ho\u1eb7c h\u01b0 h\u1ecfng, t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 suy gi\u1ea3m.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Viettel li\u1ec7t k\u00ea l\u1ed7i Fast Connector v\u00e0 suy hao quang trong nh\u00f3m nguy\u00ean nh\u00e2n khi\u1ebfn modem b\u00e1o \u0111\u00e8n \u0111\u1ecf. Nh\u1eefng l\u1ed7i n\u00e0y th\u01b0\u1eddng c\u1ea7n k\u1ef9 thu\u1eadt vi\u00ean \u0111o c\u00f4ng su\u1ea5t quang v\u00e0 x\u1eed l\u00fd b\u1eb1ng thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng n\u00ean t\u1ef1 r\u00fat \u0111\u1ea7u n\u1ed1i ra \u0111\u1ec3 lau. B\u1ee5i nh\u1ecf b\u00e1m v\u00e0o b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00edn hi\u1ec7u, trong khi thao t\u00e1c kh\u00f4ng \u0111\u00fang c\u00f3 th\u1ec3 l\u00e0m \u0111\u1ea7u n\u1ed1i h\u01b0 h\u1ecfng th\u00eam.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Tuy\u1ebfn c\u00e1p b\u00ean ngo\u00e0i b\u1ecb \u1ea3nh h\u01b0\u1edfng<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1p b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ee9t ho\u1eb7c suy hao do thi c\u00f4ng \u0111i\u1ec7n n\u01b0\u1edbc, c\u1ea3i t\u1ea1o \u0111\u01b0\u1eddng, xe t\u1ea3i va v\u00e0o d\u00e2y, c\u00e2y \u0111\u1ed5 ho\u1eb7c c\u00f4ng tr\u00ecnh k\u00e9o c\u00e1p kh\u00e1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, d\u00e2y b\u00ean trong nh\u00e0 v\u1eabn nguy\u00ean v\u1eb9n nh\u01b0ng modem ti\u1ebfp t\u1ee5c b\u00e1o LOS \u0111\u1ecf. Nhi\u1ec1u kh\u00e1ch h\u00e0ng trong c\u00f9ng khu v\u1ef1c c\u0169ng c\u00f3 th\u1ec3 m\u1ea5t m\u1ea1ng \u0111\u1ed3ng th\u1eddi.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu h\u00e0ng x\u00f3m s\u1eed d\u1ee5ng Viettel c\u0169ng g\u1eb7p t\u00ecnh tr\u1ea1ng t\u01b0\u01a1ng t\u1ef1, kh\u1ea3 n\u0103ng s\u1ef1 c\u1ed1 n\u1eb1m \u1edf tuy\u1ebfn c\u00e1p ho\u1eb7c thi\u1ebft b\u1ecb h\u1ea1 t\u1ea7ng khu v\u1ef1c s\u1ebd cao h\u01a1n. Tuy nhi\u00ean, b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt v\u1eabn c\u1ea7n ki\u1ec3m tra \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c ph\u1ea1m vi l\u1ed7i.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">M\u1ea5t m\u1ea1ng sau m\u01b0a l\u1edbn<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">M\u01b0a kh\u00f4ng nh\u1ea5t thi\u1ebft tr\u1ef1c ti\u1ebfp l\u00e0m h\u1ecfng s\u1ee3i quang, nh\u01b0ng gi\u00f3 m\u1ea1nh, c\u00e2y \u0111\u1ed5, n\u01b0\u1edbc v\u00e0o h\u1ed9p n\u1ed1i, m\u1ea5t \u0111i\u1ec7n h\u1ea1 t\u1ea7ng ho\u1eb7c v\u1eadt th\u1ec3 va ch\u1ea1m c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n \u0111\u01b0\u1eddng truy\u1ec1n.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu Internet m\u1ea5t ngay sau m\u01b0a l\u1edbn v\u00e0 LOS chuy\u1ec3n \u0111\u1ecf, ng\u01b0\u1eddi d\u00f9ng n\u00ean gi\u1eef nguy\u00ean d\u00e2y, kh\u00f4ng leo l\u00ean m\u00e1i ho\u1eb7c c\u1ed9t \u0111\u1ec3 ki\u1ec3m tra. H\u00e3y b\u00e1o t\u00ecnh tr\u1ea1ng cho b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt v\u00e0 cho bi\u1ebft th\u1eddi \u0111i\u1ec3m s\u1ef1 c\u1ed1 b\u1eaft \u0111\u1ea7u.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">H\u1ed9p c\u00e1p ho\u1eb7c thi\u1ebft b\u1ecb OLT g\u1eb7p s\u1ef1 c\u1ed1<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">OLT l\u00e0 thi\u1ebft b\u1ecb t\u1ea1i ph\u00eda m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p, c\u00f3 nhi\u1ec7m v\u1ee5 k\u1ebft n\u1ed1i v\u00e0 qu\u1ea3n l\u00fd nhi\u1ec1u modem quang c\u1ee7a kh\u00e1ch h\u00e0ng. N\u1ebfu m\u1ed9t c\u1ed5ng, tuy\u1ebfn truy\u1ec1n d\u1eabn ho\u1eb7c thi\u1ebft b\u1ecb trung gian g\u1eb7p v\u1ea5n \u0111\u1ec1, modem t\u1ea1i nh\u00e0 c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e2y l\u00e0 nguy\u00ean nh\u00e2n ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng th\u1ec3 t\u1ef1 ki\u1ec3m tra b\u1eb1ng \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c giao di\u1ec7n modem. K\u1ef9 thu\u1eadt vi\u00ean c\u1ea7n x\u00e1c \u0111\u1ecbnh l\u1ed7i n\u1eb1m \u1edf thu\u00ea bao ri\u00eang l\u1ebb, h\u1ed9p c\u00e1p hay h\u1ea1 t\u1ea7ng chung.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u1ed5ng quang ho\u1eb7c modem GPON g\u1eb7p l\u1ed7i<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Tr\u01b0\u1eddng h\u1ee3p \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n l\u00e0 c\u1ed5ng quang, b\u1ed9 thu t\u00edn hi\u1ec7u ho\u1eb7c ph\u1ea7n c\u1ee9ng b\u00ean trong modem b\u1ecb l\u1ed7i.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">D\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 g\u1ed3m modem t\u1eebng b\u1ecb r\u01a1i, ng\u1ea5m n\u01b0\u1edbc, qu\u00e1 nhi\u1ec7t, ngu\u1ed3n \u0111i\u1ec7n b\u1ea5t th\u01b0\u1eddng ho\u1eb7c v\u1eabn b\u00e1o LOS d\u00f9 k\u1ef9 thu\u1eadt vi\u00ean \u0111\u00e3 x\u00e1c nh\u1eadn t\u00edn hi\u1ec7u quang t\u1ea1i \u0111\u1ea7u d\u00e2y \u0111\u1ea1t y\u00eau c\u1ea7u.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean t\u1ef1 m\u1edf v\u1ecf modem. Vi\u1ec7c ki\u1ec3m tra ph\u1ea7n c\u1ee9ng v\u00e0 quy\u1ebft \u0111\u1ecbnh s\u1eeda ho\u1eb7c thay thi\u1ebft b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach_xac_dinh_nguyen_nhan_den_LOS_do_tai_nha\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1ch x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n \u0111\u00e8n LOS \u0111\u1ecf t\u1ea1i nh\u00e0<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1921\" aria-describedby=\"caption-attachment-1921\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1921 size-full\" title=\"X\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n \u0111\u00e8n LOS \u0111\u1ecf t\u1ea1i nh\u00e0\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-3.jpg\" alt=\"X\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n \u0111\u00e8n LOS \u0111\u1ecf t\u1ea1i nh\u00e0\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-3.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-3-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-3-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1921\" class=\"wp-caption-text\">X\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n \u0111\u00e8n LOS \u0111\u1ecf t\u1ea1i nh\u00e0<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u1ea7n th\u00e1o thi\u1ebft b\u1ecb \u0111\u1ec3 th\u1ef1c hi\u1ec7n b\u01b0\u1edbc ki\u1ec3m tra ban \u0111\u1ea7u. Ch\u1ec9 c\u1ea7n quan s\u00e1t tr\u1ea1ng th\u00e1i modem, ph\u1ea1m vi m\u1ea5t m\u1ea1ng v\u00e0 \u0111\u01b0\u1eddng d\u00e2y c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">H\u00e3y th\u1eed truy c\u1eadp Internet b\u1eb1ng \u0111i\u1ec7n tho\u1ea1i, m\u00e1y t\u00ednh v\u00e0 tivi \u0111ang k\u1ebft n\u1ed1i c\u00f9ng modem.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu t\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb \u0111\u1ec1u m\u1ea5t m\u1ea1ng \u0111\u1ed3ng th\u1eddi v\u1edbi LOS \u0111\u1ecf, nguy\u00ean nh\u00e2n kh\u00f4ng n\u1eb1m \u1edf m\u1ed9t \u0111i\u1ec7n tho\u1ea1i ri\u00eang l\u1ebb. N\u1ebfu ch\u1ec9 m\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c nh\u01b0ng LOS kh\u00f4ng \u0111\u1ecf, c\u1ea7n ki\u1ec3m tra thi\u1ebft b\u1ecb \u0111\u00f3 tr\u01b0\u1edbc.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Quan s\u00e1t t\u1ed5 h\u1ee3p \u0111\u00e8n tr\u00ean modem<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean ch\u1ec9 nh\u00ecn m\u1ed9t \u0111\u00e8n. H\u00e3y ki\u1ec3m tra Power, PON, LOS, Internet v\u00e0 WiFi.<\/span><\/p>\n<table dir=\"ltr\" style=\"width: 46.5511%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" data-sheets-root=\"1\" data-sheets-baot=\"1\">\n<colgroup>\n<col width=\"267\" \/>\n<col width=\"438\" \/><\/colgroup>\n<tbody>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">Hi\u1ec7n t\u01b0\u1ee3ng<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Nh\u1eadn \u0111\u1ecbnh ban \u0111\u1ea7u<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">Power s\u00e1ng, WiFi s\u00e1ng, LOS \u0111\u1ecf<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Modem c\u00f3 \u0111i\u1ec7n v\u00e0 v\u1eabn ph\u00e1t WiFi nh\u01b0ng m\u1ea5t t\u00edn hi\u1ec7u quang<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">Power s\u00e1ng, PON t\u1eaft, LOS \u0111\u1ecf<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Kh\u1ea3 n\u0103ng cao \u0111\u01b0\u1eddng truy\u1ec1n quang \u0111ang g\u1eb7p s\u1ef1 c\u1ed1<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">Power t\u1eaft, t\u1ea5t c\u1ea3 \u0111\u00e8n t\u1eaft<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra ngu\u1ed3n \u0111i\u1ec7n tr\u01b0\u1edbc<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">PON s\u00e1ng, LOS t\u1eaft, Internet kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3i l\u1ed7i LOS<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf sau khi di chuy\u1ec3n modem<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra d\u00e2y c\u00f3 b\u1ecb k\u00e9o ho\u1eb7c g\u1eadp<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf sau m\u01b0a ho\u1eb7c thi c\u00f4ng<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn tuy\u1ebfn c\u00e1p b\u00ean ngo\u00e0i<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 37.7305%;\"><span style=\"font-family: 'times new roman', times, serif;\">Modem t\u1ef1 t\u1eaft b\u1eadt v\u00e0 \u0111\u00e8n thay \u0111\u1ed5i li\u00ean t\u1ee5c<\/span><\/td>\n<td style=\"width: 83.6935%;\"><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra ngu\u1ed3n v\u00e0 ph\u1ea7n c\u1ee9ng modem<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Quan s\u00e1t d\u00e2y c\u00e1p quang<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Theo d\u00f5i d\u00e2y t\u1eeb modem \u0111\u1ebfn v\u1ecb tr\u00ed \u0111i ra ngo\u00e0i nh\u00e0. H\u00e3y t\u00ecm \u0111o\u1ea1n b\u1ecb c\u1eeda k\u1eb9p, v\u1eadt n\u1eb7ng \u0111\u00e8, k\u00e9o c\u0103ng ho\u1eb7c c\u00f3 d\u1ea5u hi\u1ec7u b\u1ecb c\u1eafn.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ch\u1ec9 quan s\u00e1t v\u00e0 gi\u1ea3i ph\u00f3ng v\u1eadt c\u1ea3n nh\u1eb9 n\u1ebfu c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n an to\u00e0n. Kh\u00f4ng k\u00e9o d\u00e2y ra kh\u1ecfi n\u1eb9p, kh\u00f4ng th\u00e1o \u0111\u1ea7u n\u1ed1i v\u00e0 kh\u00f4ng c\u1ed1 l\u00e0m th\u1eb3ng b\u1eb1ng l\u1ef1c m\u1ea1nh.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu d\u00e2y ch\u1ea1y qua tr\u1ea7n, m\u00e1i nh\u00e0, c\u1ed9t ho\u1eb7c v\u1ecb tr\u00ed g\u1ea7n \u0111\u01b0\u1eddng \u0111i\u1ec7n, kh\u00f4ng t\u1ef1 ti\u1ebfp c\u1eadn. H\u00e3y m\u00f4 t\u1ea3 v\u1ecb tr\u00ed \u0111\u00f3 khi b\u00e1o k\u1ef9 thu\u1eadt.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u x\u1ea3y ra l\u1ed7i<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n LOS \u0111\u1ecf c\u00f3 th\u1ec3 gi\u00fap khoanh v\u00f9ng nguy\u00ean nh\u00e2n.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu l\u1ed7i x\u1ea3y ra ngay sau khi d\u1ecdn nh\u00e0 ho\u1eb7c chuy\u1ec3n modem, d\u00e2y trong nh\u00e0 c\u00f3 th\u1ec3 b\u1ecb t\u00e1c \u0111\u1ed9ng. N\u1ebfu l\u1ed7i xu\u1ea5t hi\u1ec7n sau m\u01b0a l\u1edbn ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng thi c\u00f4ng, tuy\u1ebfn c\u00e1p b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu Internet m\u1ea5t \u0111\u1ed9t ng\u1ed9t m\u00e0 kh\u00f4ng c\u00f3 thay \u0111\u1ed5i n\u00e0o trong nh\u00e0, ng\u01b0\u1eddi d\u00f9ng n\u00ean ki\u1ec3m tra xem c\u00e1c h\u1ed9 g\u1ea7n \u0111\u00f3 c\u00f3 g\u1eb7p c\u00f9ng t\u00ecnh tr\u1ea1ng kh\u00f4ng r\u1ed3i li\u00ean h\u1ec7 Viettel \u0111\u1ec3 x\u00e1c nh\u1eadn.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach_xu_ly_den_LOS_do_Viettel_an_toan_theo_5_buoc\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1ch x\u1eed l\u00fd \u0111\u00e8n LOS \u0111\u1ecf Viettel an to\u00e0n theo 5 b\u01b0\u1edbc<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1922\" aria-describedby=\"caption-attachment-1922\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1922 size-full\" title=\"X\u1eed l\u00fd \u0111\u00e8n LOS \u0111\u1ecf Viettel theo 5 b\u01b0\u1edbc\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-4.jpg\" alt=\"X\u1eed l\u00fd \u0111\u00e8n LOS \u0111\u1ecf Viettel theo 5 b\u01b0\u1edbc\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-4.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-4-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-4-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1922\" class=\"wp-caption-text\">X\u1eed l\u00fd \u0111\u00e8n LOS \u0111\u1ecf Viettel theo 5 b\u01b0\u1edbc<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Quy tr\u00ecnh d\u01b0\u1edbi \u0111\u00e2y ch\u1ec9 g\u1ed3m nh\u1eefng thao t\u00e1c ki\u1ec3m tra c\u01a1 b\u1ea3n. Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u1ea7n m\u1edf modem, th\u00e1o \u0111\u1ea7u quang ho\u1eb7c thay \u0111\u1ed5i c\u1ea5u h\u00ecnh GPON.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u01b0\u1edbc 1: X\u00e1c nh\u1eadn \u0111\u00fang \u0111\u00e8n LOS \u0111ang \u0111\u1ecf<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ecdc t\u00ean \u0111\u01b0\u1ee3c in c\u1ea1nh \u0111\u00e8n \u0111\u1ec3 tr\u00e1nh nh\u1ea7m LOS v\u1edbi Internet, PON ho\u1eb7c Alarm.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ti\u1ebfp t\u1ee5c ki\u1ec3m tra xem \u0111\u00e8n Power c\u00f3 s\u00e1ng kh\u00f4ng, PON \u0111ang \u1edf tr\u1ea1ng th\u00e1i n\u00e0o v\u00e0 to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb c\u00f3 m\u1ea5t Internet kh\u00f4ng. C\u00f3 th\u1ec3 ch\u1ee5p m\u1ed9t \u1ea3nh r\u00f5 m\u1eb7t tr\u01b0\u1edbc modem \u0111\u1ec3 g\u1eedi cho b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u01b0\u1edbc 2: Ki\u1ec3m tra ngu\u1ed3n modem<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Modem c\u1ea7n \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 hi\u1ec3n th\u1ecb tr\u1ea1ng th\u00e1i ch\u00ednh x\u00e1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra ph\u00edch c\u1eafm, d\u00e2y ngu\u1ed3n, n\u00fat ON\/OFF v\u00e0 \u1ed5 \u0111i\u1ec7n. N\u1ebfu modem li\u00ean t\u1ee5c t\u1eaft b\u1eadt, h\u00e3y th\u1eed m\u1ed9t \u1ed5 \u0111i\u1ec7n ch\u1eafc ch\u1eafn kh\u00e1c nh\u01b0ng v\u1eabn s\u1eed d\u1ee5ng \u0111\u00fang b\u1ed9 ngu\u1ed3n \u0111i k\u00e8m thi\u1ebft b\u1ecb.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng d\u00f9ng b\u1ed9 ngu\u1ed3n kh\u00e1c th\u00f4ng s\u1ed1 v\u00ec c\u00f3 th\u1ec3 l\u00e0m modem ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c h\u01b0 h\u1ecfng.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u01b0\u1edbc 3: Quan s\u00e1t \u0111\u01b0\u1eddng d\u00e2y b\u1eb1ng m\u1eaft th\u01b0\u1eddng<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra \u0111o\u1ea1n d\u00e2y quang c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn an to\u00e0n. N\u1ebfu d\u00e2y \u0111ang b\u1ecb m\u1ed9t v\u1eadt nh\u1eb9 \u0111\u00e8 l\u00ean, c\u00f3 th\u1ec3 c\u1ea9n th\u1eadn di chuy\u1ec3n v\u1eadt \u0111\u00f3 m\u00e0 kh\u00f4ng k\u00e9o ho\u1eb7c b\u1ebb d\u00e2y.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu nh\u00ecn th\u1ea5y d\u00e2y b\u1ecb \u0111\u1ee9t, h\u00e3y gi\u1eef nguy\u00ean hi\u1ec7n tr\u1ea1ng. Kh\u00f4ng th\u1eed n\u1ed1i, b\u00f3c v\u1ecf ho\u1eb7c d\u00f9ng b\u0103ng d\u00ednh \u0111\u1ec3 s\u1eeda.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ea7u c\u00e1p quang c\u00f3 th\u1ec3 mang t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng kh\u00f4ng nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng, v\u00ec v\u1eady kh\u00f4ng nh\u00ecn tr\u1ef1c ti\u1ebfp v\u00e0o \u0111\u1ea7u s\u1ee3i ho\u1eb7c c\u1ed5ng quang.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u01b0\u1edbc 4: Kh\u1edfi \u0111\u1ed9ng l\u1ea1i modem m\u1ed9t l\u1ea7n<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu ngu\u1ed3n v\u00e0 d\u00e2y b\u00ean ngo\u00e0i kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng, c\u00f3 th\u1ec3 t\u1eaft modem b\u1eb1ng n\u00fat ON\/OFF, ch\u1edd kho\u1ea3ng 2\u20133 ph\u00fat r\u1ed3i b\u1eadt l\u1ea1i. Viettel h\u01b0\u1edbng d\u1eabn ng\u01b0\u1eddi d\u00f9ng s\u1eed d\u1ee5ng n\u00fat ngu\u1ed3n khi c\u1ea7n kh\u1edfi \u0111\u1ed9ng l\u1ea1i v\u00e0 l\u01b0u \u00fd kh\u00f4ng nh\u1ea7m v\u1edbi n\u00fat Reset.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Sau khi b\u1eadt, h\u00e3y ch\u1edd modem ho\u00e0n t\u1ea5t qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng r\u1ed3i quan s\u00e1t l\u1ea1i PON v\u00e0 LOS.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu LOS ti\u1ebfp t\u1ee5c \u0111\u1ecf, kh\u00f4ng c\u1ea7n t\u1eaft b\u1eadt nhi\u1ec1u l\u1ea7n. Vi\u1ec7c kh\u1edfi \u0111\u1ed9ng l\u1ea1i kh\u00f4ng th\u1ec3 s\u1eeda m\u1ed9t s\u1ee3i c\u00e1p b\u1ecb \u0111\u1ee9t ho\u1eb7c t\u00edn hi\u1ec7u quang b\u1ecb suy hao.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u01b0\u1edbc 5: B\u00e1o k\u1ef9 thu\u1eadt n\u1ebfu LOS v\u1eabn \u0111\u1ecf<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Chu\u1ea9n b\u1ecb s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u0103ng k\u00fd, m\u00e3 kh\u00e1ch h\u00e0ng n\u1ebfu c\u00f3, \u0111\u1ecba ch\u1ec9 l\u1eafp \u0111\u1eb7t, th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u m\u1ea5t m\u1ea1ng v\u00e0 tr\u1ea1ng th\u00e1i \u0111\u00e8n modem.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 th\u1ec3 m\u00f4 t\u1ea3 nh\u01b0 sau:<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Internet Viettel t\u1ea1i \u0111\u1ecba ch\u1ec9 c\u1ee7a t\u00f4i m\u1ea5t t\u1eeb kho\u1ea3ng 19 gi\u1edd. Modem v\u1eabn c\u00f3 ngu\u1ed3n, \u0111\u00e8n PON kh\u00f4ng s\u00e1ng v\u00e0 \u0111\u00e8n LOS \u0111ang nh\u1ea5p nh\u00e1y \u0111\u1ecf. T\u00f4i \u0111\u00e3 ki\u1ec3m tra d\u00e2y b\u00ean ngo\u00e0i v\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i modem nh\u01b0ng l\u1ed7i v\u1eabn c\u00f2n.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Th\u00f4ng tin c\u1ee5 th\u1ec3 gi\u00fap b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3 nh\u1eadn bi\u1ebft \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 l\u1ed7i t\u00edn hi\u1ec7u quang thay v\u00ec l\u1ed7i WiFi tr\u00ean \u0111i\u1ec7n tho\u1ea1i.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Den_LOS_do_co_tu_sua_duoc_khong\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS \u0111\u1ecf c\u00f3 t\u1ef1 s\u1eeda \u0111\u01b0\u1ee3c kh\u00f4ng?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1923\" aria-describedby=\"caption-attachment-1923\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1923 size-full\" title=\"\u0110\u00e8n LOS \u0111\u1ecf Viettel c\u00f3 t\u1ef1 s\u1eeda \u0111\u01b0\u1ee3c kh\u00f4ng\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-5.jpg\" alt=\"\u0110\u00e8n LOS \u0111\u1ecf Viettel c\u00f3 t\u1ef1 s\u1eeda \u0111\u01b0\u1ee3c kh\u00f4ng\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-5.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-5-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-5-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1923\" class=\"wp-caption-text\">\u0110\u00e8n LOS \u0111\u1ecf Viettel c\u00f3 t\u1ef1 s\u1eeda \u0111\u01b0\u1ee3c kh\u00f4ng<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ph\u1ea7n l\u1edbn tr\u01b0\u1eddng h\u1ee3p LOS \u0111\u1ecf kh\u00f4ng th\u1ec3 x\u1eed l\u00fd ho\u00e0n to\u00e0n ch\u1ec9 b\u1eb1ng c\u00e0i \u0111\u1eb7t tr\u00ean \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c kh\u1edfi \u0111\u1ed9ng modem. N\u1ebfu nguy\u00ean nh\u00e2n l\u00e0 \u0111\u1ee9t c\u00e1p, suy hao \u0111\u1ea7u n\u1ed1i, h\u1ecfng c\u1ed5ng quang ho\u1eb7c l\u1ed7i h\u1ea1 t\u1ea7ng, k\u1ef9 thu\u1eadt vi\u00ean c\u1ea7n d\u00f9ng thi\u1ebft b\u1ecb \u0111o v\u00e0 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 c\u00f3 th\u1ec3 t\u1ef1 x\u1eed l\u00fd m\u1ed9t s\u1ed1 nguy\u00ean nh\u00e2n \u0111\u01a1n gi\u1ea3n b\u00ean ngo\u00e0i, ch\u1eb3ng h\u1ea1n modem b\u1ecb m\u1ea5t ngu\u1ed3n ho\u1eb7c d\u00e2y \u0111ang b\u1ecb m\u1ed9t v\u1eadt nh\u1eb9 \u0111\u00e8 l\u00ean. Sau khi lo\u1ea1i b\u1ecf t\u00e1c \u0111\u1ed9ng m\u00e0 LOS v\u1eabn \u0111\u1ecf, n\u00ean d\u1eebng ki\u1ec3m tra v\u00e0 g\u1eedi y\u00eau c\u1ea7u h\u1ed7 tr\u1ee3.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 n\u00ean r\u00fat \u0111\u1ea7u c\u00e1p quang r\u1ed3i c\u1eafm l\u1ea1i kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean t\u1ef1 r\u00fat n\u1ebfu ch\u01b0a \u0111\u01b0\u1ee3c k\u1ef9 thu\u1eadt vi\u00ean h\u01b0\u1edbng d\u1eabn. \u0110\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 b\u1ecb b\u1ee5i b\u1ea9n, l\u1ec7ch ho\u1eb7c h\u01b0 h\u1ecfng trong qu\u00e1 tr\u00ecnh thao t\u00e1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00e1c v\u1edbi d\u00e2y LAN, \u0111\u1ea7u c\u00e1p quang c\u1ea7n \u0111\u1ed9 s\u1ea1ch v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c cao. Vi\u1ec7c r\u00fat ra c\u1eafm l\u1ea1i kh\u00f4ng \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 l\u00e0m t\u00edn hi\u1ec7u suy hao nhi\u1ec1u h\u01a1n.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 n\u00ean Reset modem khi LOS \u0111\u1ecf kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng. Reset \u0111\u01b0a modem v\u1ec1 c\u1ea5u h\u00ecnh m\u1eb7c \u0111\u1ecbnh nh\u01b0ng kh\u00f4ng kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u n\u1ebfu \u0111\u01b0\u1eddng d\u00e2y b\u1ecb \u0111\u1ee9t ho\u1eb7c suy hao.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Sau khi Reset, t\u00ean WiFi, m\u1eadt kh\u1ea9u v\u00e0 c\u1ea5u h\u00ecnh d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 thay \u0111\u1ed5i ho\u1eb7c b\u1ecb x\u00f3a. Khi \u0111\u00f3, ng\u01b0\u1eddi d\u00f9ng v\u1eeba ch\u01b0a gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c LOS \u0111\u1ecf v\u1eeba ph\u1ea3i c\u1ea5u h\u00ecnh l\u1ea1i thi\u1ebft b\u1ecb.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">H\u00e3y d\u00f9ng n\u00fat ON\/OFF n\u1ebfu c\u1ea7n kh\u1edfi \u0111\u1ed9ng l\u1ea1i. Viettel c\u0169ng ph\u00e2n bi\u1ec7t r\u00f5 thao t\u00e1c kh\u1edfi \u0111\u1ed9ng b\u1eb1ng n\u00fat ngu\u1ed3n v\u1edbi thao t\u00e1c Reset modem.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 n\u00ean t\u1ef1 n\u1ed1i c\u00e1p quang kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean. N\u1ed1i c\u00e1p quang c\u1ea7n d\u1ee5ng c\u1ee5, \u0111\u1ea7u n\u1ed1i ho\u1eb7c m\u00e1y h\u00e0n quang ph\u00f9 h\u1ee3p, \u0111\u1ed3ng th\u1eddi ph\u1ea3i \u0111o suy hao sau khi x\u1eed l\u00fd.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Vi\u1ec7c t\u1ef1 n\u1ed1i b\u1eb1ng tay ho\u1eb7c b\u0103ng d\u00ednh kh\u00f4ng th\u1ec3 t\u1ea1o ra \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ea1t y\u00eau c\u1ea7u. Thao t\u00e1c sai c\u00f2n c\u00f3 th\u1ec3 l\u00e0m \u0111o\u1ea1n d\u00e2y c\u1ea7n thay d\u00e0i h\u01a1n.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf nh\u01b0ng Internet v\u1eabn d\u00f9ng \u0111\u01b0\u1ee3c c\u00f3 b\u00ecnh th\u01b0\u1eddng kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Tr\u1ea1ng th\u00e1i n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra trong th\u1eddi gian ng\u1eafn khi modem \u0111ang kh\u1edfi \u0111\u1ed9ng, \u0111\u00e8n hi\u1ec3n th\u1ecb kh\u00e1c theo t\u1eebng m\u1eabu ho\u1eb7c thi\u1ebft b\u1ecb \u0111ang s\u1eed d\u1ee5ng m\u1ed9t k\u1ebft n\u1ed1i d\u1ef1 ph\u00f2ng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">H\u00e3y ki\u1ec3m tra \u0111\u00fang nh\u00e3n \u0111\u00e8n, th\u1eed t\u1eaft d\u1eef li\u1ec7u di \u0111\u1ed9ng tr\u00ean \u0111i\u1ec7n tho\u1ea1i v\u00e0 truy c\u1eadp l\u1ea1i b\u1eb1ng WiFi. N\u1ebfu x\u00e1c nh\u1eadn LOS \u0111ang \u0111\u1ecf nh\u01b0ng Internet v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng, n\u00ean ch\u1ee5p \u1ea3nh modem v\u00e0 nh\u1edd b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt ki\u1ec3m tra.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Khi_nao_can_lien_he_ky_thuat_Viettel\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">Khi n\u00e0o c\u1ea7n li\u00ean h\u1ec7 k\u1ef9 thu\u1eadt Viettel?<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1924\" aria-describedby=\"caption-attachment-1924\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1924 size-full\" title=\"Khi n\u00e0o c\u1ea7n li\u00ean h\u1ec7 k\u1ef9 thu\u1eadt Viettel\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-6.jpg\" alt=\"Khi n\u00e0o c\u1ea7n li\u00ean h\u1ec7 k\u1ef9 thu\u1eadt Viettel\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-6.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-6-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-6-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1924\" class=\"wp-caption-text\">Khi n\u00e0o c\u1ea7n li\u00ean h\u1ec7 k\u1ef9 thu\u1eadt Viettel<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng n\u00ean b\u00e1o k\u1ef9 thu\u1eadt khi LOS \u0111\u1ecf k\u00e9o d\u00e0i sau khi \u0111\u00e3 ki\u1ec3m tra ngu\u1ed3n v\u00e0 kh\u1edfi \u0111\u1ed9ng modem m\u1ed9t l\u1ea7n. C\u0169ng c\u1ea7n b\u00e1o s\u1edbm n\u1ebfu PON kh\u00f4ng s\u00e1ng, d\u00e2y quang b\u1ecb \u0111\u1ee9t, m\u1ea1ng m\u1ea5t sau m\u01b0a l\u1edbn ho\u1eb7c nhi\u1ec1u h\u1ed9 trong khu v\u1ef1c c\u00f9ng m\u1ea5t k\u1ebft n\u1ed1i.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu modem c\u00f3 m\u00f9i kh\u00e9t, b\u1ed9 ngu\u1ed3n ph\u00e1t ti\u1ebfng l\u1ea1, thi\u1ebft b\u1ecb ng\u1ea5m n\u01b0\u1edbc ho\u1eb7c d\u00e2y n\u1eb1m g\u1ea7n \u0111\u01b0\u1eddng \u0111i\u1ec7n b\u1ecb h\u1ecfng, h\u00e3y \u01b0u ti\u00ean an to\u00e0n. Kh\u00f4ng ch\u1ea1m v\u00e0o khu v\u1ef1c nguy hi\u1ec3m v\u00e0 kh\u00f4ng ti\u1ebfp t\u1ee5c c\u1ea5p ngu\u1ed3n khi thi\u1ebft b\u1ecb c\u00f3 d\u1ea5u hi\u1ec7u ch\u1eadp \u0111i\u1ec7n.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1ch b\u00e1o l\u1ed7i \u0111\u00e8n LOS \u0111\u1ecf<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u00ednh n\u0103ng qu\u1ea3n l\u00fd v\u00e0 b\u00e1o l\u1ed7i d\u1ecbch v\u1ee5 c\u1ed1 \u0111\u1ecbnh tr\u00ean My Viettel. C\u00e1c t\u00e0i li\u1ec7u ch\u01b0\u01a1ng tr\u00ecnh self-care c\u1ee7a Viettel c\u0169ng li\u1ec7t k\u00ea qu\u1ea3n l\u00fd modem WiFi v\u00e0 b\u00e1o l\u1ed7i d\u1ecbch v\u1ee5 trong nh\u00f3m ti\u1ec7n \u00edch d\u00e0nh cho thu\u00ea bao c\u1ed1 \u0111\u1ecbnh.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ngo\u00e0i ra, k\u00eanh ch\u0103m s\u00f3c kh\u00e1ch h\u00e0ng d\u1ecbch v\u1ee5 c\u1ed1 \u0111\u1ecbnh \u0111\u01b0\u1ee3c Viettel c\u00f4ng b\u1ed1 l\u00e0 1800 8119.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Khi b\u00e1o l\u1ed7i, n\u00ean cung c\u1ea5p \u0111\u1ee7:<\/span><\/p>\n<table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" data-sheets-root=\"1\" data-sheets-baot=\"1\">\n<colgroup>\n<col width=\"179\" \/>\n<col width=\"300\" \/><\/colgroup>\n<tbody>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Th\u00f4ng tin<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">N\u1ed9i dung c\u1ea7n chu\u1ea9n b\u1ecb<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Thu\u00ea bao<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">S\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u0103ng k\u00fd ho\u1eb7c m\u00e3 kh\u00e1ch h\u00e0ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ecba ch\u1ec9<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ecba ch\u1ec9 \u0111ang l\u1eafp \u0111\u1eb7t Internet<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Th\u1eddi gian<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u m\u1ea5t k\u1ebft n\u1ed1i<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n modem<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Power, PON, LOS v\u00e0 Internet<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Ph\u1ea1m vi l\u1ed7i<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">M\u1ed9t hay to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb m\u1ea5t m\u1ea1ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Hi\u1ec7n tr\u1ea1ng d\u00e2y<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 b\u1ecb \u0111\u1ee9t, g\u1eadp ho\u1eb7c k\u00e9o c\u0103ng kh\u00f4ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Thao t\u00e1c \u0111\u00e3 th\u1eed<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra ngu\u1ed3n v\u00e0 kh\u1edfi \u0111\u1ed9ng modem<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif;\">L\u1ecbch li\u00ean h\u1ec7<\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif;\">Khung gi\u1edd c\u00f3 ng\u01b0\u1eddi t\u1ea1i \u0111\u1ecba ch\u1ec9<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Bao l\u00e2u k\u1ef9 thu\u1eadt Viettel \u0111\u1ebfn ki\u1ec3m tra?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng c\u00f3 m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ed1 \u0111\u1ecbnh \u00e1p d\u1ee5ng cho m\u1ecdi s\u1ef1 c\u1ed1 LOS \u0111\u1ecf. Th\u1eddi gian x\u1eed l\u00fd ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed, nguy\u00ean nh\u00e2n, th\u1eddi ti\u1ebft, kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn tuy\u1ebfn c\u00e1p v\u00e0 s\u1ed1 l\u01b0\u1ee3ng thu\u00ea bao b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">L\u1ed7i t\u1ea1i d\u00e2y ho\u1eb7c modem c\u1ee7a m\u1ed9t kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd kh\u00e1c v\u1edbi s\u1ef1 c\u1ed1 tr\u00ean tuy\u1ebfn c\u00e1p chung. Khi g\u1eedi y\u00eau c\u1ea7u, ng\u01b0\u1eddi d\u00f9ng n\u00ean h\u1ecfi tr\u1ef1c ti\u1ebfp th\u1eddi gian d\u1ef1 ki\u1ebfn v\u00e0 theo d\u00f5i tr\u1ea1ng th\u00e1i tr\u00ean k\u00eanh h\u1ed7 tr\u1ee3.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu \u0111\u00e3 c\u00f3 m\u00e3 y\u00eau c\u1ea7u, h\u00e3y gi\u1eef \u0111i\u1ec7n tho\u1ea1i c\u00f3 th\u1ec3 nh\u1eadn cu\u1ed9c g\u1ecdi v\u00e0 th\u00f4ng b\u00e1o khung gi\u1edd c\u00f3 ng\u01b0\u1eddi \u1edf nh\u00e0. Kh\u00f4ng n\u00ean g\u1eedi nhi\u1ec1u y\u00eau c\u1ea7u tr\u00f9ng nhau v\u00ec c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 kh\u0103n khi theo d\u00f5i l\u1ecbch x\u1eed l\u00fd.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">K\u1ef9 thu\u1eadt vi\u00ean th\u01b0\u1eddng ki\u1ec3m tra nh\u1eefng g\u00ec?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">K\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 ki\u1ec3m tra m\u1ee9c t\u00edn hi\u1ec7u quang, \u0111\u1ea7u n\u1ed1i, d\u00e2y trong nh\u00e0, h\u1ed9p c\u00e1p, c\u1ed5ng k\u1ebft n\u1ed1i v\u00e0 modem GPON. C\u00e1ch x\u1eed l\u00fd ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed ph\u00e1t sinh suy hao ho\u1eb7c m\u1ea5t t\u00edn hi\u1ec7u.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu d\u00e2y b\u1ecb \u0111\u1ee9t, k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 thay \u0111\u1ea7u n\u1ed1i, n\u1ed1i l\u1ea1i ho\u1eb7c thay \u0111o\u1ea1n d\u00e2y ph\u00f9 h\u1ee3p. N\u1ebfu t\u00edn hi\u1ec7u t\u1eeb h\u1ea1 t\u1ea7ng b\u00ecnh th\u01b0\u1eddng nh\u01b0ng modem kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c, thi\u1ebft b\u1ecb s\u1ebd \u0111\u01b0\u1ee3c ki\u1ec3m tra th\u00eam.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach_han_che_loi_LOS_do_tai_dien\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00e1ch h\u1ea1n ch\u1ebf l\u1ed7i LOS \u0111\u1ecf t\u00e1i di\u1ec5n<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure id=\"attachment_1925\" aria-describedby=\"caption-attachment-1925\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1925 size-full\" title=\"C\u00e1ch h\u1ea1n ch\u1ebf l\u1ed7i LOS \u0111\u1ecf Viettel t\u00e1i di\u1ec5n\" src=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-7.jpg\" alt=\"C\u00e1ch h\u1ea1n ch\u1ebf l\u1ed7i LOS \u0111\u1ecf Viettel t\u00e1i di\u1ec5n\" width=\"800\" height=\"600\" srcset=\"http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-7.jpg 800w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-7-533x400.jpg 533w, http:\/\/viettelvtt.com\/wp-content\/uploads\/2026\/07\/den-los-do-viettel-7-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-1925\" class=\"wp-caption-text\">C\u00e1ch h\u1ea1n ch\u1ebf l\u1ed7i LOS \u0111\u1ecf Viettel t\u00e1i di\u1ec5n<\/figcaption><\/figure>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng th\u1ec3 ph\u00f2ng tr\u00e1nh ho\u00e0n to\u00e0n s\u1ef1 c\u1ed1 h\u1ea1 t\u1ea7ng, nh\u01b0ng ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 gi\u1ea3m nguy c\u01a1 h\u1ecfng d\u00e2y v\u00e0 \u0111\u1ea7u n\u1ed1i trong nh\u00e0.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng t\u1ef1 di chuy\u1ec3n modem b\u1eb1ng c\u00e1ch k\u00e9o d\u00e2y<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Khi c\u1ea7n thay \u0111\u1ed5i v\u1ecb tr\u00ed \u0111\u1eb7t modem, kh\u00f4ng n\u00ean k\u00e9o d\u00e2y quang hi\u1ec7n c\u00f3 sang ph\u00f2ng kh\u00e1c. D\u00e2y c\u00f3 th\u1ec3 b\u1ecb c\u0103ng, g\u1eadp ho\u1eb7c bong kh\u1ecfi n\u1eb9p.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu v\u1ecb tr\u00ed m\u1edbi c\u00e1ch xa \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t ban \u0111\u1ea7u, n\u00ean y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt kh\u1ea3o s\u00e1t v\u00e0 \u0111i l\u1ea1i d\u00e2y ph\u00f9 h\u1ee3p.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">B\u1ea3o v\u1ec7 d\u00e2y kh\u1ecfi v\u1eadt n\u1eb7ng v\u00e0 c\u1eeda ra v\u00e0o<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng \u0111\u1ec3 d\u00e2y ch\u1ea1y qua ch\u00e2n b\u00e0n, b\u00e1nh xe gh\u1ebf, khe c\u1eeda ho\u1eb7c khu v\u1ef1c th\u01b0\u1eddng xuy\u00ean di chuy\u1ec3n \u0111\u1ed3 \u0111\u1ea1c.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">D\u00e2y n\u00ean \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh g\u1ecdn, kh\u00f4ng cu\u1ed9n th\u00e0nh v\u00f2ng qu\u00e1 nh\u1ecf v\u00e0 kh\u00f4ng b\u1ecb bu\u1ed9c ch\u1eb7t c\u00f9ng d\u00e2y \u0111i\u1ec7n.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1eb7t modem t\u1ea1i n\u01a1i kh\u00f4 r\u00e1o<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Modem n\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf v\u1ecb tr\u00ed th\u00f4ng tho\u00e1ng, tr\u00e1nh n\u01b0\u1edbc, \u0111\u1ed9 \u1ea9m cao v\u00e0 \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng \u0111\u1eb7t thi\u1ebft b\u1ecb s\u00e1t b\u1ec3 c\u00e1, c\u1eeda s\u1ed5 d\u1ec5 h\u1eaft m\u01b0a ho\u1eb7c khu v\u1ef1c c\u00f3 nguy c\u01a1 n\u01b0\u1edbc \u0111\u1ed5 v\u00e0o. Ngu\u1ed3n v\u00e0 modem c\u1ea7n c\u00f3 kh\u00f4ng gian t\u1ea3n nhi\u1ec7t.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng t\u1ef1 th\u00e1o \u0111\u1ea7u n\u1ed1i quang<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Gi\u1eef nguy\u00ean \u0111\u1ea7u n\u1ed1i n\u1ebfu d\u1ecbch v\u1ee5 \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng. Vi\u1ec7c th\u00e1o ra \u0111\u1ec3 v\u1ec7 sinh ho\u1eb7c ki\u1ec3m tra c\u00f3 th\u1ec3 l\u00e0m b\u1ee5i b\u00e1m v\u00e0o b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Khi c\u1ea7n v\u1ec7 sinh khu v\u1ef1c \u0111\u1eb7t modem, ch\u1ec9 lau ph\u1ea7n v\u1ecf b\u00ean ngo\u00e0i b\u1eb1ng v\u1eadt li\u1ec7u kh\u00f4 v\u00e0 kh\u00f4ng t\u00e1c \u0111\u1ed9ng v\u00e0o c\u1ed5ng quang.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Ki\u1ec3m tra d\u00e2y sau khi s\u1eeda ch\u1eefa nh\u00e0<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Sau khi khoan t\u01b0\u1eddng, l\u1eafp t\u1ee7, s\u1eeda \u0111i\u1ec7n ho\u1eb7c di chuy\u1ec3n \u0111\u1ed3 n\u1ed9i th\u1ea5t, n\u00ean ki\u1ec3m tra xem d\u00e2y quang c\u00f3 b\u1ecb k\u1eb9p ho\u1eb7c k\u00e9o c\u0103ng kh\u00f4ng.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu c\u1ea7n thi c\u00f4ng g\u1ea7n tuy\u1ebfn d\u00e2y, h\u00e3y th\u00f4ng b\u00e1o cho ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n \u0111\u1ec3 tr\u00e1nh khoan, c\u1eaft ho\u1eb7c \u0111\u00f3ng \u0111inh v\u00e0o v\u1ecb tr\u00ed c\u00e1p \u0111i qua.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap_ve_den_LOS_do_Viettel\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0111\u00e8n LOS \u0111\u1ecf Viettel<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS \u0111\u1ecf Viettel c\u00f3 ph\u1ea3i \u0111\u1ee9t c\u00e1p kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u1ee9t c\u00e1p l\u00e0 m\u1ed9t nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u01b0ng kh\u00f4ng ph\u1ea3i nguy\u00ean nh\u00e2n duy nh\u1ea5t. LOS \u0111\u1ecf c\u0169ng c\u00f3 th\u1ec3 do d\u00e2y b\u1ecb g\u1eadp, suy hao \u0111\u1ea7u n\u1ed1i, l\u1ed7i h\u1ed9p c\u00e1p, h\u1ea1 t\u1ea7ng ho\u1eb7c c\u1ed5ng quang tr\u00ean modem.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS nh\u1ea5p nh\u00e1y \u0111\u1ecf c\u00f3 nghi\u00eam tr\u1ecdng kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS nh\u1ea5p nh\u00e1y \u0111\u1ecf th\u01b0\u1eddng cho bi\u1ebft modem kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u quang \u1ed5n \u0111\u1ecbnh. N\u1ebfu to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb m\u1ea5t Internet, n\u00ean ki\u1ec3m tra d\u00e2y b\u00ean ngo\u00e0i v\u00e0 b\u00e1o k\u1ef9 thu\u1eadt.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">PON t\u1eaft v\u00e0 LOS \u0111\u1ecf l\u00e0 l\u1ed7i g\u00ec?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">T\u1ed5 h\u1ee3p n\u00e0y th\u01b0\u1eddng cho th\u1ea5y modem ch\u01b0a nh\u1eadn ho\u1eb7c ch\u01b0a \u0111\u0103ng k\u00fd \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u quang. Nguy\u00ean nh\u00e2n c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra t\u1eeb d\u00e2y trong nh\u00e0 \u0111\u1ebfn h\u1ea1 t\u1ea7ng GPON.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS \u0111\u1ecf nh\u01b0ng WiFi v\u1eabn hi\u1ec7n l\u00e0 sao?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Modem v\u1eabn c\u00f3 th\u1ec3 ph\u00e1t t\u00ean WiFi d\u00f9 \u0111\u00e3 m\u1ea5t k\u1ebft n\u1ed1i quang. Thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c v\u1edbi modem nh\u01b0ng kh\u00f4ng th\u1ec3 \u0111i ra Internet.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Kh\u1edfi \u0111\u1ed9ng l\u1ea1i modem c\u00f3 h\u1ebft LOS \u0111\u1ecf kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u1edfi \u0111\u1ed9ng l\u1ea1i c\u00f3 th\u1ec3 lo\u1ea1i tr\u1eeb m\u1ed9t s\u1ed1 l\u1ed7i t\u1ea1m th\u1eddi, nh\u01b0ng kh\u00f4ng s\u1eeda \u0111\u01b0\u1ee3c d\u00e2y b\u1ecb \u0111\u1ee9t, \u0111\u1ea7u n\u1ed1i suy hao ho\u1eb7c s\u1ef1 c\u1ed1 h\u1ea1 t\u1ea7ng. Ch\u1ec9 n\u00ean kh\u1edfi \u0111\u1ed9ng m\u1ed9t l\u1ea7n r\u1ed3i b\u00e1o k\u1ef9 thu\u1eadt n\u1ebfu LOS v\u1eabn \u0111\u1ecf.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Reset modem c\u00f3 s\u1eeda \u0111\u01b0\u1ee3c l\u1ed7i LOS kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng. Reset ch\u1ec9 \u0111\u01b0a c\u1ea5u h\u00ecnh modem v\u1ec1 m\u1eb7c \u0111\u1ecbnh v\u00e0 c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t th\u00f4ng tin \u0111ang s\u1eed d\u1ee5ng. Reset kh\u00f4ng kh\u00f4i ph\u1ee5c t\u00edn hi\u1ec7u quang.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 th\u1ec3 t\u1ef1 n\u1ed1i l\u1ea1i d\u00e2y quang b\u1ecb \u0111\u1ee9t kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean. C\u00e1p quang c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng \u0111\u1ea7u n\u1ed1i v\u00e0 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng, sau \u0111\u00f3 ph\u1ea3i ki\u1ec3m tra m\u1ee9c suy hao.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf sau m\u01b0a l\u1edbn ph\u1ea3i l\u00e0m g\u00ec?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">H\u00e3y ki\u1ec3m tra modem v\u00e0 d\u00e2y t\u1eeb v\u1ecb tr\u00ed an to\u00e0n, kh\u00f4ng leo cao ho\u1eb7c ch\u1ea1m v\u00e0o \u0111\u01b0\u1eddng d\u00e2y kh\u00f4ng x\u00e1c \u0111\u1ecbnh. Sau \u0111\u00f3 b\u00e1o k\u1ef9 thu\u1eadt v\u00e0 cung c\u1ea5p th\u1eddi \u0111i\u1ec3m m\u1ea5t m\u1ea1ng.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">LOS \u0111\u1ecf c\u00f3 l\u00e0m h\u1ecfng \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c m\u00e1y t\u00ednh kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng. L\u1ed7i LOS ch\u1ee7 y\u1ebfu l\u00e0m gi\u00e1n \u0111o\u1ea1n k\u1ebft n\u1ed1i Internet qua modem, kh\u00f4ng tr\u1ef1c ti\u1ebfp l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb \u0111ang s\u1eed d\u1ee5ng WiFi.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">Modem Viettel b\u00e1o LOS \u0111\u1ecf nh\u01b0ng ch\u1ec9 m\u1ed9t m\u00e1y m\u1ea5t m\u1ea1ng c\u00f3 h\u1ee3p l\u00fd kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">C\u1ea7n ki\u1ec3m tra l\u1ea1i \u0111\u00fang \u0111\u00e8n v\u00e0 k\u1ebft n\u1ed1i c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb. Khi modem th\u1ef1c s\u1ef1 m\u1ea5t t\u00edn hi\u1ec7u quang, th\u00f4ng th\u01b0\u1eddng to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u00f3 s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">C\u00f3 c\u1ea7n thay modem khi LOS \u0111\u1ecf kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Kh\u00f4ng n\u00ean k\u1ebft lu\u1eadn c\u1ea7n thay modem tr\u01b0\u1edbc khi \u0111o t\u00edn hi\u1ec7u. Ph\u1ea7n l\u1edbn tr\u01b0\u1eddng h\u1ee3p c\u1ea7n ki\u1ec3m tra d\u00e2y, \u0111\u1ea7u n\u1ed1i ho\u1eb7c h\u1ea1 t\u1ea7ng tr\u01b0\u1edbc.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">G\u1ecdi s\u1ed1 n\u00e0o khi modem Viettel b\u00e1o LOS \u0111\u1ecf?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">K\u00eanh h\u1ed7 tr\u1ee3 d\u1ecbch v\u1ee5 c\u1ed1 \u0111\u1ecbnh c\u1ee7a Viettel \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 l\u00e0 1800 8119. Ng\u01b0\u1eddi d\u00f9ng c\u0169ng c\u00f3 th\u1ec3 ki\u1ec3m tra c\u00e1c ti\u1ec7n \u00edch b\u00e1o l\u1ed7i d\u1ecbch v\u1ee5 tr\u00ean My Viettel.<\/span><\/p>\n<h3><strong><span style=\"font-family: 'times new roman', times, serif;\">K\u1ef9 thu\u1eadt c\u00f3 c\u1ea7n v\u00e0o trong nh\u00e0 kh\u00f4ng?<\/span><\/strong><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u1ecb tr\u00ed ph\u00e1t sinh l\u1ed7i. N\u1ebfu s\u1ef1 c\u1ed1 n\u1eb1m \u1edf d\u00e2y, \u0111\u1ea7u n\u1ed1i ho\u1eb7c modem trong nh\u00e0, k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 c\u1ea7n ti\u1ebfp c\u1eadn v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t. N\u1ebfu l\u1ed7i n\u1eb1m tr\u00ean h\u1ea1 t\u1ea7ng chung, m\u1ed9t s\u1ed1 c\u00f4ng vi\u1ec7c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u00ean ngo\u00e0i.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span><span style=\"color: #ed1c24;\"><strong><span style=\"font-family: 'times new roman', times, serif;\">K\u1ebft lu\u1eadn<\/span><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-family: 'times new roman', times, serif;\">\u0110\u00e8n LOS \u0111\u1ecf Viettel th\u01b0\u1eddng cho bi\u1ebft modem GPON \u0111ang m\u1ea5t ho\u1eb7c nh\u1eadn t\u00edn hi\u1ec7u c\u00e1p quang kh\u00f4ng \u0111\u1ea1t y\u00eau c\u1ea7u. Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 l\u00e0 d\u00e2y b\u1ecb \u0111\u1ee9t, g\u1eadp, k\u00e9o c\u0103ng, \u0111\u1ea7u n\u1ed1i suy hao, h\u1ea1 t\u1ea7ng khu v\u1ef1c ho\u1eb7c ph\u1ea7n c\u1ee9ng modem g\u1eb7p v\u1ea5n \u0111\u1ec1.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">Ng\u01b0\u1eddi d\u00f9ng n\u00ean ki\u1ec3m tra \u0111\u00fang \u0111\u00e8n, quan s\u00e1t ngu\u1ed3n v\u00e0 \u0111\u01b0\u1eddng d\u00e2y t\u1eeb b\u00ean ngo\u00e0i, sau \u0111\u00f3 kh\u1edfi \u0111\u1ed9ng modem b\u1eb1ng n\u00fat ON\/OFF m\u1ed9t l\u1ea7n. Kh\u00f4ng n\u00ean Reset modem, th\u00e1o \u0111\u1ea7u quang, t\u1ef1 n\u1ed1i d\u00e2y ho\u1eb7c thay \u0111\u1ed5i c\u1ea5u h\u00ecnh GPON.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif;\">N\u1ebfu LOS ti\u1ebfp t\u1ee5c \u0111\u1ecf, PON kh\u00f4ng s\u00e1ng ho\u1eb7c to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb m\u1ea5t Internet, h\u00e3y g\u1eedi y\u00eau c\u1ea7u h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt. Khi li\u00ean h\u1ec7, c\u1ea7n cung c\u1ea5p \u0111\u1ecba ch\u1ec9 l\u1eafp \u0111\u1eb7t, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i \u0111\u0103ng k\u00fd, th\u1eddi \u0111i\u1ec3m x\u1ea3y ra l\u1ed7i v\u00e0 tr\u1ea1ng th\u00e1i c\u00e1c \u0111\u00e8n tr\u00ean modem.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u00e8n LOS \u0111\u1ecf Viettel l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y modem GPON kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ho\u1eb7c \u0111ang nh\u1eadn t\u00edn hi\u1ec7u quang qu\u00e1 y\u1ebfu t\u1eeb h\u1ec7 th\u1ed1ng c\u1ee7a nh\u00e0 m\u1ea1ng. Khi l\u1ed7i xu\u1ea5t hi\u1ec7n, t\u00ean WiFi c\u00f3 th\u1ec3 v\u1eabn hi\u1ec3n th\u1ecb tr\u00ean \u0111i\u1ec7n tho\u1ea1i nh\u01b0ng thi\u1ebft b\u1ecb kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c Internet. M\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p to\u00e0n<\/p>\n","protected":false},"author":1,"featured_media":1919,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[563,567,566,565,568,564],"class_list":["post-1913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-den-los-do-modem","tag-internet-mat-tin-hieu","tag-loi-cap-quang","tag-modem-bao-los","tag-modem-viettel-loi","tag-pon-do"],"_links":{"self":[{"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/posts\/1913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/comments?post=1913"}],"version-history":[{"count":5,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/posts\/1913\/revisions"}],"predecessor-version":[{"id":1926,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/posts\/1913\/revisions\/1926"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/media\/1919"}],"wp:attachment":[{"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/media?parent=1913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/categories?post=1913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/viettelvtt.com\/wp-json\/wp\/v2\/tags?post=1913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}