{"id":22361,"date":"2026-09-24T12:37:44","date_gmt":"2026-09-24T04:37:44","guid":{"rendered":"https:\/\/www.luleey.com\/?p=22361"},"modified":"2026-09-23T12:59:19","modified_gmt":"2026-09-23T04:59:19","slug":"sfp-rx-los-vs-tx-fault-what-each-alarm-means","status":"publish","type":"post","link":"https:\/\/www.luleey.com\/ko\/sfp-rx-los-vs-tx-fault-what-each-alarm-means\/","title":{"rendered":"SFP RX LOS \ub300 TX \uc624\ub958: \uac01 \uacbd\ubcf4\uc758 \uc758\ubbf8"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-9ece3cbf\"><strong><a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/sfp\/\" title=\"SFP\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">SFP<\/a> <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/rx-los\/\" title=\"RX LOS\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">RX LOS<\/a> vs <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/tx-fault\/\" title=\"TX Fault\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">TX \uc624\ub958<\/a><\/strong> \uc774\ub294 \uad6c\uccb4\uc801\uc778 \uc6d0\uc778\uc744 \ud30c\uc545\ud558\uae30 \uc704\ud55c \ubb38\uc81c \ud574\uacb0 \uc9c8\ubb38\uc774\uba70, \ub3d9\uc77c\ud55c \uc624\ub958\uc5d0 \ub300\ud55c \ub450 \uac00\uc9c0 \uba85\uce6d\uc774 \uc544\ub2d9\ub2c8\ub2e4. RX LOS\ub294 \ub85c\uceec \ubaa8\ub4c8\uc774 \uc218\uc2e0 \uc2e0\ud638 \uc190\uc2e4 \uc0c1\ud0dc\ub97c \ubcf4\uace0\ud558\uace0 \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. TX Fault\ub294 \ub85c\uceec \ubaa8\ub4c8\uc774 \uc1a1\uc2e0\uae30 \uce21\uc5d0\uc11c \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud588\uc74c\uc744 \ubcf4\uace0\ud558\uace0 \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-90a88710\">\ub450 \uc0c1\ud0dc \uc911 \uc5b4\ub290 \ud558\ub098\ub9cc\uc73c\ub85c\ub294 \uc804\uccb4 \ud2b8\ub79c\uc2dc\ubc84\uc5d0 \ubb38\uc81c\uac00 \uc788\ub2e4\ub294 \uac83\uc744 \uc99d\uba85\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uc0c1\ud0dc\ub97c \ubcf4\uace0\ud558\ub294 \ucabd\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec, \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud55c \ubc29\ud5a5\uc744 \ud30c\uc545\ud55c \ub2e4\uc74c, \ud574\ub2f9 \ubc29\ud5a5\uc758 \ubd80\ud488\uc744 \ud55c \ubc88\uc5d0 \ud558\ub098\uc529 \ud14c\uc2a4\ud2b8\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2aafb900\">\uc774 \uac00\uc774\ub4dc\uc5d0\uc11c\ub294 \uc77c\ubc18\uc801\uc778 \uc810\ub300\uc810 \uad11 \uc774\ub354\ub137 SFP \ubc0f <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/sfp-2\/\" title=\"SFP+\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">SFP+<\/a> \ub9c1\ud06c. \uc815\ud655\ud55c \ub77c\ubca8, \uadf9\uc131 \ubc0f \uc0c1\ud0dc \ud45c\uc2dc\ub294 \ubaa8\ub4c8\uacfc \ud638\uc2a4\ud2b8\uc5d0 \ub530\ub77c \ub2e4\ub97c \uc218 \uc788\uc73c\ubbc0\ub85c, \uc2e4\uc81c \ud558\ub4dc\uc6e8\uc5b4\uc5d0 \ub300\ud574\uc11c\ub294 \ud574\ub2f9 \uc124\uba85\uc11c\ub97c \ucc38\uc870\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-36b3e9d8\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-22362\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-vs-tx-fault-hero-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-847767e5\">SFP \uc218\uc2e0 LOS \ub300 \uc1a1\uc2e0 \uc624\ub958: \ub2e8 1\ubd84\uc758 \ucc28\uc774<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3546919a\">\uc7a5\uce58 A\uc640 \uc7a5\uce58 B \uc0ac\uc774\uc5d0 \uac04\ub2e8\ud55c \uc774\uc911 \ud1b5\uc2e0 \ub9c1\ud06c\uac00 \uc124\uc815\ub418\uc5b4 \uc788\ub2e4\uace0 \uac00\uc815\ud569\uc2dc\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\uc7a5\uce58 B\uc5d0 \ud45c\uc2dc\ub41c \uc0c1\ud0dc<\/th><th>\ubaa8\ub4c8\uc774 \ubcf4\uace0\ud558\ub294 \ub0b4\uc6a9<\/th><th>\uba3c\uc800 \uac80\ud1a0\ud574\uc57c \ud560 \uc0ac\ud56d<\/th><th>\uc774\uac83\uc774 \uc99d\uba85\ud558\uc9c0 \ubabb\ud558\ub294 \uac83<\/th><\/tr><\/thead><tbody><tr><td>RX LOS \uc2e0\ud638 \ubc1c\uc0dd<\/td><td>B\uc758 \uc218\uc2e0\uae30\uac00 \uc815\uc0c1\uc801\uc778 \uc218\uc2e0 \uc2e0\ud638\ub97c \uac10\uc9c0\ud558\uc9c0 \ubabb\ud569\ub2c8\ub2e4.<\/td><td>\uc1a1\uc2e0\uae30 \u2192 A-B \uac04 \uad11\uc12c\uc720 \uacbd\ub85c \u2192 B \uc218\uc2e0\uae30<\/td><td>B\uc758 \uc218\uc2e0\uae30\ub294 \ubd84\uba85\ud788 \uace0\uc7a5 \ub09c \uac83 \uac19\uc2b5\ub2c8\ub2e4.<\/td><\/tr><tr><td>TX \uc624\ub958 \ubc1c\uc0dd<\/td><td>B \ubaa8\ub4c8\uc5d0\uc11c \ub85c\uceec \uc1a1\uc2e0\uae30 \uc624\ub958\uac00 \ubcf4\uace0\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/td><td>B \ud638\uc2a4\ud2b8 \uc804\uc6d0\/\uc81c\uc5b4 \u2192 B \ubaa8\ub4c8 \uc1a1\uc2e0\uae30<\/td><td>B-to-A \uad11\uc12c\uc720\uac00 \ub04a\uc5b4\uc84c\uc2b5\ub2c8\ub2e4.<\/td><\/tr><tr><td>\ub450 \uc0ac\ub78c \ubaa8\ub450 \ub2e4\uc74c\uacfc \uac19\uc774 \uc8fc\uc7a5\ud588\ub2e4.<\/td><td>B\uc5d0\ub294 \ub85c\uceec \uc1a1\uc2e0(TX) \uc624\ub958\uac00 \ubc1c\uc0dd\ud588\uc73c\uba70, \uc815\uc0c1\uc801\uc778 \uc218\uc2e0 \uc2e0\ud638\ub3c4 \uac10\uc9c0\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/td><td>\uc9c0\uc2dc \uc0ac\ud56d\uc744 \uac01\uac01 \ucc98\ub9ac\ud55c \ub2e4\uc74c, \uacf5\uc720 \uc804\ub825, \uad6c\uc131 \ubc0f \ubaa8\ub4c8 \uc0c1\ud0dc\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/td><td>\ub2e8 \ud558\ub098\uc758 \uc12c\uc720 \uc808\ub2e8\ub9cc\uc73c\ub85c\ub3c4 \ubaa8\ub4e0 \uc99d\uc0c1\uc744 \uc124\uba85\ud560 \uc218 \uc788\ub2e4<\/td><\/tr><tr><td>\ub458 \ub2e4 \ud655\uc778\ub418\uc9c0 \uc54a\uc558\uc9c0\ub9cc, \ub9c1\ud06c\uac00 \uc791\ub3d9\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/td><td>\uc774 \ub450 \uac00\uc9c0 \uc0c1\ud0dc \uc2e0\ud638\ub294 \uc6d0\uc778\uc744 \ud30c\uc545\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/td><td>PMD, \uc804\uc1a1 \uc18d\ub3c4, FEC, \ud638\uc2a4\ud2b8 \ubaa8\ub4dc, \ucf54\ub529, \uadf9\uc131 \ubc0f \ud53c\uc5b4 \uc0c1\ud0dc<\/td><td>\ubb3c\ub9ac\uc801 \ubc0f \uc804\uae30\uc801 \uad6c\uc131\uc774 \ud638\ud658\ub429\ub2c8\ub2e4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6095e855\">\ud604\uc7ac <a href=\"https:\/\/members.snia.org\/document\/dl\/25880\" target=\"_blank\" rel=\"noopener\">SNIA SFF-8419 \uc0ac\uc591<\/a> \uc9c0\ub3c4 <code>Tx_Fault<\/code> \ubaa8\ub4c8\uc758 \uc1a1\uc2e0\uae30 \uc624\ub958 \ucd9c\ub825\uc73c\ub85c\uc11c \uadf8\ub9ac\uace0 <code>Rx_LOS<\/code> \uc218\uc2e0 \uce21\uc758 \uc2e0\ud638 \uc190\uc2e4 \ud45c\uc2dc\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774\ub354\ub137\uc5d0\uc11c\ub294 \uc218\uc2e0 \uc2e0\ud638\uac00 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\uc2dc\ub420 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. <strong>\uc2e0\ud638 \uac10\uc9c0<\/strong>. \ub530\ub77c\uc11c \uc9c4\ud589\uc790\ub294 \ub3d9\uc77c\ud55c \uadfc\ubcf8\uc801\uc778 \uc0c1\ud669\uc744 \uae0d\uc815\uc801\uc774\uac70\ub098 \ubd80\uc815\uc801\uc778 \ud45c\ud604\uc73c\ub85c \ub098\ud0c0\ub0bc \uc218 \uc788\ub294\ub370, \uc608\ub97c \ub4e4\uc5b4 \ub2e4\uc74c\uacfc \uac19\uc774 <code>RX LOS: \uc608<\/code> \ub610\ub294 <code>\uc2e0\ud638 \uac10\uc9c0: \uc5c6\uc74c<\/code>.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3f341e3c\">\uc775\uc219\ud558\uc9c0 \uc54a\uc740 \uac83\uc744 <code>RX \uc624\ub958<\/code> \ud50c\ub7ab\ud3fc \uc124\uba85\uc11c\uc5d0 \ud574\ub2f9 \ub77c\ubca8\uc774 RX LOS, \ub0ae\uc740 \uc218\uc2e0 \uc804\ub825, PCS \uc624\ub958, \ub610\ub294 \uadf8 \uc678\uc758 \ubcf5\ud569\uc801\uc778 \uc0c1\ud0dc\ub97c \uc758\ubbf8\ud558\ub294\uc9c0 \uba85\uc2dc\ub420 \ub54c\uae4c\uc9c0\ub294 \uc774 \ub77c\ubca8\uc744 \uadf8\ub300\ub85c \ub450\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-faabc045\">RX LOS\uac00 \uc811\uadfc \ubc29\ud5a5\uc73c\ub85c \ub2e4\uc2dc \ud5a5\ud558\uace0 \uc788\ub2e4<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-258b847d\">\uc7a5\uce58 B\uc5d0\uc11c RX LOS \uc2e0\ud638\uac00 \ubc1c\uc0dd\ud558\uba74, B\ub85c \ub4e4\uc5b4\uc640\uc57c \ud560 \uad11\ud559 \ubc29\ud5a5\ubd80\ud130 \uc2dc\uc791\ud558\uc2ed\uc2dc\uc624:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8332752b\"><strong>A \uc1a1\uc2e0(TX) \u2192 A \ucee4\ub125\ud130 \u2192 \uad11\uc12c\uc720 \uacbd\ub85c \u2192 B \ucee4\ub125\ud130 \u2192 B \uc218\uc2e0(RX)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-96271753\">\uac00\ub2a5\ud55c \uc6d0\uc778\uc73c\ub85c\ub294 A \uce21 \uc1a1\uc2e0\uae30\uc758 \uc791\ub3d9 \uc911\uc9c0 \ub610\ub294 \uace0\uc7a5, \ub4c0\ud50c\ub809\uc2a4 \uadf9\uc131 \ubc18\uc804, \ucee4\ub125\ud130 \ubd84\ub9ac \ub610\ub294 \uc624\uc5fc, \uacfc\ub3c4\ud55c \uacbd\ub85c \uc190\uc2e4, \uc798\ubabb\ub41c \uad11\uc12c\uc720 \uc720\ud615, \ud638\ud658\ub418\uc9c0 \uc54a\ub294 \ud30c\uc7a5 \ub610\ub294 PMD, \uc798\ubabb\ub41c BiDi A\/B \uc30d, \ub610\ub294 B \uce21 \uc218\uc2e0\uae30\uc758 \ubb38\uc81c \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4. RX LOS\ub294 \ubb38\uc81c\uc758 \ubc94\uc704\ub97c \uc881\ud600\uc904 \ubfd0, \ud2b9\uc815 \uace0\uc7a5 \ub09c \ubd80\ud488\uc744 \uc815\ud655\ud788 \uc9c0\ubaa9\ud558\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1b834363\">\ubc18\ub300 \ubc29\ud5a5\uc740 \ubcc4\ub3c4\ub85c \ud655\uc778\ud574 \ubcf4\uc138\uc694. A\ub294 B\ub85c\ubd80\ud130 \ud3c9\uc18c\uc640 \uac19\uc774 \ub370\uc774\ud130\ub97c \uc218\uc2e0\ud558\uace0 \uc788\uc9c0\ub9cc, B\ub294 A\ub85c\ubd80\ud130 \uc544\ubb34\uac83\ub3c4 \uc218\uc2e0\ud558\uc9c0 \ubabb\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. \u2018\ub9c1\ud06c \ub2e4\uc6b4\u2019 \uc544\uc774\ucf58 \ud558\ub098\ub9cc \ud45c\uc2dc\ub418\uba74 \uc774\ub7ec\ud55c \ubc29\ud5a5\uc0c1\uc758 \ucc28\uc774\uac00 \uc885\uc885 \uac04\uacfc\ub418\uae30 \uc27d\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-36b41886\">\ub4c0\ud50c\ub809\uc2a4 \ub9c1\ud06c\uc758 \uacbd\uc6b0, \uac01 \uc1a1\uc2e0\uae30\uac00 \ubc18\ub300\ud3b8 \uc218\uc2e0\uae30\uc5d0 \uc2e0\ud638\ub97c \uc804\ub2ec\ud558\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. \ub2e8\uc77c \uad11\uc12c\uc720 BiDi\uc758 \uacbd\uc6b0, \uc1a1\uc2e0 \ubc0f \uc218\uc2e0 \ud30c\uc7a5\uc774 \uc11c\ub85c \ubcf4\uc644\uc801\uc778\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. \ub450 \ubaa8\ub4c8\uc774 \ubaa8\ub450 \uac19\uc740 \ubc29\ud5a5\uc744 \ud5a5\ud558\ub294 \uacbd\uc6b0\ub294 \uc77c\ubc18\uc801\uc778 \uc30d\uc774 \uc544\ub2d9\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-773f86cd\">TX \uc624\ub958\ub294 \uc1a1\uc2e0\uae30 \uce21\uc5d0\uc11c \uad6d\ubd80\uc801\uc73c\ub85c \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b18959a0\">\uc7a5\uce58 B\uc5d0\uc11c TX \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uba74, \uba3c\uc800 B\uc758 \ubaa8\ub4c8\uacfc \ud574\ub2f9 \ud638\uc2a4\ud2b8\uac00 \uc1a1\uc2e0\uae30\uc5d0 \uc804\uc6d0\uc744 \uacf5\uae09\ud558\uace0 \uc81c\uc5b4\ud558\ub294 \ubc29\uc2dd\uc5d0 \uc8fc\ubaa9\ud558\uc2ed\uc2dc\uc624. \ud638\uc2a4\ud2b8\uac00 \uc758\ub3c4\uc801\uc73c\ub85c TX \ube44\ud65c\uc131\ud654 \uc2e0\ud638\ub97c \ubcf4\ub0c8\ub294\uc9c0, \ucd08\uae30\ud654 \ud6c4 \uc9c4\ub2e8 \ub370\uc774\ud130\uac00 \uc815\uc0c1\uc778\uc9c0, \uadf8\ub9ac\uace0 \ud574\ub2f9 \ubaa8\ub4c8\uc758 \uc804\uc555, \uc628\ub3c4 \ub610\ub294 \uae30\ud0c0 \uc1a1\uc2e0\uae30 \uacbd\uace0 \uac12\uc5d0 \uc774\uc0c1\uc774 \uc788\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-de56146d\">TX Disable\uacfc TX Fault\ub294 \uc11c\ub85c \ub2e4\ub978 \uc2e0\ud638\uc785\ub2c8\ub2e4. TX Disable\uc740 \uc1a1\uc2e0\uae30\ub97c \ub044\ub294 \ud638\uc2a4\ud2b8-\ubaa8\ub4c8 \uac04 \uc81c\uc5b4 \uc2e0\ud638\uc785\ub2c8\ub2e4. TX Fault\ub294 \ubaa8\ub4c8-\ud638\uc2a4\ud2b8 \uac04 \uc0c1\ud0dc \uc2e0\ud638\uc785\ub2c8\ub2e4. \uc1a1\uc2e0\uae30\uac00 \ube44\ud65c\uc131\ud654\ub41c \uacbd\uc6b0, \uc1a1\uc2e0\uae30 \uace0\uc7a5\uc774 \ubc1c\uc0dd\ud588\uc74c\uc744 \uc785\uc99d\ud558\uc9c0 \ubabb\ud55c \ucc44\ub3c4 \uc6d0\uaca9 \uce21\uc5d0\uc11c RX LOS\ub97c \ubcf4\uace0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a94df145\">DDM\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0, TX \uc624\ub958\ub97c \ub3d9\uc77c\ud55c \ud0c0\uc784\uc2a4\ud0ec\ud504\uc758 \uc628\ub3c4, \uacf5\uae09 \uc804\uc555, TX \ubc14\uc774\uc5b4\uc2a4 \ubc0f TX \ucd9c\ub825 \uc804\ub825\uacfc \ube44\uad50\ud558\uc2ed\uc2dc\uc624. LuLeey\u2019s <a href=\"https:\/\/www.luleey.com\/ko\/sfp-tx-bias-current-high-causes-and-fixes\/\">SFP TX \ubc14\uc774\uc5b4\uc2a4 \uc804\ub958 \uc548\ub0b4\uc11c<\/a> \ud3b8\ud5a5 \uacbd\uace0, \uc1a1\uc2e0 \uc804\ub825 \uc800\ud558, \uc1a1\uc2e0 \uc624\ub958\uac00 \ud568\uaed8 \ub098\ud0c0\ub0a0 \ub54c, \uc774 \uc138 \uac00\uc9c0\uac00 \uac1c\ubcc4\uc801\uc778 \uc218\uce58 \ud558\ub098\ubcf4\ub2e4 \ub354 \ub9ce\uc740 \uc815\ubcf4\ub97c \uc81c\uacf5\ud55c\ub2e4\ub294 \uc774\uc720\ub97c \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d768143c\">\ud50c\ub798\uadf8\ub97c \uc9c0\uc6b0\uae30 \uc704\ud574 \uc6b4\uc601 \uc911\uc778 \ubaa8\ub4c8\uc744 \ubc18\ubcf5\uc801\uc73c\ub85c \uc7ac\uc124\uc815\ud558\uac70\ub098 \ud56b \ud50c\ub7ec\uadf8\ud558\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \ud638\uc2a4\ud2b8 \ubc0f \ubaa8\ub4c8 \uad00\ub828 \uc808\ucc28\ub97c \ub530\ub974\uace0, \uc6d0\ubcf8 \uc99d\uac70 \uc790\ub8cc\ub97c \ubcf4\uc874\ud558\uba70, \uc2b9\uc778\ub41c \uc720\uc9c0\ubcf4\uc218 \uc2dc\uac04\ub300\ub97c \ud65c\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-b479039e\">RX LOS\ub294 RX \uc804\uc6d0 \uacbd\ubcf4\uc640 \ub2e4\ub985\ub2c8\ub2e4.<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1c6fdc12\"><a href=\"https:\/\/members.snia.org\/document\/dl\/25916\" target=\"_blank\" rel=\"noopener\">SFF-8472 Rev 12.5a<\/a> \uc628\ub3c4, \uc804\uc555, \uc1a1\uc2e0 \ubc14\uc774\uc5b4\uc2a4, \uc1a1\uc2e0 \uc804\ub825 \ubc0f \uc218\uc2e0 \uad11\uc804\ub825\uc5d0 \ub300\ud55c \uc120\ud0dd\uc801 \uacbd\ubcf4 \ubc0f \uacbd\uace0 \ud50c\ub798\uadf8\uc640 \ubcc4\ub3c4\ub85c \ub514\uc9c0\ud138 \uc1a1\uc2e0(TX) \uc624\ub958 \ubc0f \uc218\uc2e0(RX) LOS \uc0c1\ud0dc\ub97c \uc815\uc758\ud569\ub2c8\ub2e4. \ub610\ud55c \uc18c\ud504\ud2b8 \ubaa8\ub2c8\ud130\ub9c1\uc744 \uc120\ud0dd \uc0ac\ud56d\uc73c\ub85c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-16f56dd5\">\uc774\ub7ec\ud55c \uad6c\ubd84\uc740 \uc911\uc694\ud569\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>RX LOS<\/code> \uc2e0\ud638 \uc0c1\ud0dc\ub97c \ub098\ud0c0\ub0b4\ub294 \ud45c\uc2dc\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li><code>RX \uc804\uc6d0 \ubd80\uc871 \uacbd\uace0<\/code> \ubaa8\ub2c8\ud130\ub9c1\ub41c \uac12\uc744 \uc124\uc815\ub41c \uacbd\uace0 \uc784\uacc4\uac12\uacfc \ube44\uad50\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><code>RX \uc804\uc6d0 \uc800\uc804\uc555 \uacbd\ubcf4<\/code> \ub354 \uc2ec\uac01\ud55c \uc784\uacc4\uac12 \ud45c\uc2dc\uae30\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ud45c\uc2dc\ub41c dBm \uac12\uc740 \ubaa8\ub4c8\ubcc4 \uc815\ud655\ub3c4\uc640 \ubcf4\uace0 \ubc29\uc2dd\uc5d0 \ub530\ub77c \uc0b0\ucd9c\ub41c \uc0d8\ud50c\ub9c1 \uc9c4\ub2e8 \uce21\uc815\uac12\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d7abb9a3\">\uc784\uacc4\uac12\uacfc \ub3d9\uc791 \ubc29\uc2dd\uc774 \ubc18\ub4dc\uc2dc \ub3d9\uc77c\ud560 \ud544\uc694\ub294 \uc5c6\ub2e4. \ubaa8\ub4c8\uc740 \uc218\uc2e0\ub41c \uc804\ub825\uc744 \ubcf4\uace0\ud558\ub354\ub77c\ub3c4, \uc120\ud0dd\ub41c PMD \ubc0f \uc804\uc1a1 \uc18d\ub3c4\uc5d0 \ub300\ud574 \ud5c8\uc6a9 \uac00\ub2a5\ud55c \uc2e0\ud638\ub97c \uc778\uc2dd\ud558\uc9c0 \ubabb\ud560 \uc218\ub3c4 \uc788\ub2e4. \ubc18\ub300\ub85c, \ud638\uc2a4\ud2b8\ub294 \ub0b4\ubd80\uc801\uc73c\ub85c \ubb3c\ub9ac \uc0c1\ud0dc \ud540\uc744 \uc0ac\uc6a9\ud558\ub354\ub77c\ub3c4 \uc18c\ud504\ud2b8 RX LOS\ub97c \ub178\ucd9c\ud558\uc9c0 \uc54a\uc744 \uc218\ub3c4 \uc788\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-91948d7c\">LuLeey\u2019s\ub97c \uc0ac\uc6a9\ud558\uc138\uc694 <a href=\"https:\/\/www.luleey.com\/ko\/what-is-ddm-dom-in-sfp-transceivers\/\">DDM\/DOM \ud604\uc7a5 \uc548\ub0b4\uc11c<\/a> \uc804\uccb4 \uc2a4\ub0c5\uc0f7\uc744 \uc218\uc9d1\ud558\ub824\uba74, \ub3d9\uc77c\ud55c \ubc29\ud5a5\uc5d0 \ub300\ud574 \ub85c\uceec \uc1a1\uc2e0(TX) \uc804\ub825\uacfc \uc6d0\uaca9 \uc218\uc2e0(RX) \uc804\ub825\uc744 \ube44\uad50\ud558\uace0, \ud574\ub2f9 \ubaa8\ub4c8\uc758 \uc815\ud655\ud55c \ucd5c\uc18c \ubc0f \ucd5c\ub300 \uc791\ub3d9 \ud55c\uacc4\uac12\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624. \ubcf4\ud3b8\uc801\uc73c\ub85c \u201c\uc801\uc808\ud55c\u201d dBm \uac12\uc774\ub77c\ub294 \uac83\uc740 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-ab588b48\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-22363\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/sfp-rx-los-tx-fault-workflow-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4af6aad6\">\uc81c\uc5b4\ub41c RX LOS \ubc0f TX \uc624\ub958 \ucc98\ub9ac \uc6cc\ud06c\ud50c\ub85c\uc6b0<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-121a61f3\">1. \uc815\ud655\ud55c \uc124\uc815\uc744 \uae30\ub85d\ud558\uc2ed\uc2dc\uc624.<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c974b8bc\">\ud638\uc2a4\ud2b8 \ubaa8\ub378 \ubc0f \ud3ec\ud2b8, \ud38c\uc6e8\uc5b4 \ubc0f \ub4dc\ub77c\uc774\ubc84 \ubc84\uc804, \ubaa8\ub4c8 \ubd80\ud488 \ubc88\ud638 \ubc0f \ub9ac\ube44\uc804, \ucf54\ub529, \uad11\ud559 PMD, \uad6c\uc131\ub418\uac70\ub098 \ud611\uc0c1\ub41c \uc804\uc1a1 \uc18d\ub3c4, FEC \ubc0f \ud3ec\ud2b8 \ubaa8\ub4dc\ub97c \ubaa8\ub450 \uc800\uc7a5\ud558\uc2ed\uc2dc\uc624. \ub3d9\uc2dc\uc5d0 \uc591\ucabd \ub05d\ub2e8\uc758 \uc0c1\ud0dc, DDM \uac12, \ub9c1\ud06c \uc774\ubca4\ud2b8 \ubc0f \uc624\ub958 \uce74\uc6b4\ud130\ub97c \uae30\ub85d\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-24c33d1f\">SFP, SFP+ \ub610\ub294 SFP28 \ub77c\ubca8\uc740 \ud638\ud658\uc131\uc744 \ubcf4\uc7a5\ud558\ub294 \uac83\uc774 \uc544\ub2d9\ub2c8\ub2e4. \ubb3c\ub9ac\uc801 \ud638\ud658\uc131, \ud638\uc2a4\ud2b8 SerDes \ubaa8\ub4dc, \ubaa8\ub4c8 \ucf54\ub529, \uc2e4\uc81c \uc791\ub3d9 \uc18d\ub3c4 \ubc0f \uc0ac\uc6a9 \uac00\ub2a5\ud55c \ucc98\ub9ac\ub7c9\uc740 \uac01\uac01 \ubcc4\uac1c\uc758 \uc694\uc18c\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-ba2b92a9\">2. \ub77c\ubca8\uacfc \uc8fc\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d20cf8c9\">\ub2e4\uc74c\uc5d0 \ub300\ud55c \uc815\ud655\ud55c \ud50c\ub7ab\ud3fc \uc815\uc758\ub97c \uc77d\uc5b4\ubcf4\uc138\uc694. <code>RX LOS<\/code>, <code>\uc2e0\ud638 \uac10\uc9c0<\/code>, <code>RX \uc624\ub958<\/code>, <code>TX \uc624\ub958<\/code> \uadf8\ub9ac\uace0 <code>TX \ube44\ud65c\uc131\ud654<\/code>. \ubaa8\ub4c8\uc774 \uc2dc\uc791 \ud6c4 \uc720\ud6a8\ud55c \ub370\uc774\ud130\ub97c \ubc18\ud658\ud560 \ub54c\uae4c\uc9c0 \uae30\ub2e4\ub9b0 \ub2e4\uc74c, \ub450 \ubc88\uc9f8 \ud310\ub3c5\uc744 \ud1b5\ud574 \uc0c1\ud0dc\uac00 \uc548\uc815\uc801\uc73c\ub85c \uc720\uc9c0\ub418\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f4e7bc18\">~\ub77c\uace0 \uac00\uc815\ud558\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. <code>1<\/code> \ud56d\uc0c1 \u2018\uac74\uac15\ud568\u2019\uc744 \uc758\ubbf8\ud558\uac70\ub098, \ub300\uc2dc\ubcf4\ub4dc\uc758 \ub179\uc0c9 \uc544\uc774\ucf58\uc774 \uc2e4\uc81c \uc0c1\ud0dc\ubcf4\ub2e4 \uc6b0\uc120\uc2dc\ub428\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-6acf6eef\">3. \uc591\ubc29\ud5a5 \ubaa8\ub450 \uc9c0\ub3c4\uc5d0 \ud45c\uc2dc\ud558\uae30<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-052bc45f\">\ub9c1\ud06c\ub97c \ub450 \uac1c\uc758 \uacbd\ub85c\ub85c \uc791\uc131\ud558\uc138\uc694:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A \uc1a1\uc2e0 \u2192 B \uc218\uc2e0<\/strong><\/li>\n\n\n\n<li><strong>B \uc1a1\uc2e0 \u2192 A \uc218\uc2e0<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-39258fdd\">B\uc5d0 RX LOS\uac00 \ubc1c\uc0dd\ud558\uba74 \uccab \ubc88\uc9f8 \uacbd\ub85c\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624. B\uc5d0 TX \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uace0 A\uc5d0 RX LOS\uac00 \ubc1c\uc0dd\ud558\uba74, \ub450 \uad00\uce21\uac12\uc740 <strong>B \uc1a1\uc2e0 \u2192 A \uc218\uc2e0<\/strong> \ubc29\ud5a5\uc131\uc744 \uba85\ud655\ud788 \ud558\uc5ec B\uc758 \uc1a1\uc2e0 \uce21\uc744 \ub354 \uc720\ub825\ud55c \uc6d0\uc778\uc73c\ub85c \uc9c0\ubaa9\ud569\ub2c8\ub2e4. \ub2e4\ub9cc \ud638\uc2a4\ud2b8 \uc804\uc6d0 \ubb38\uc81c, TX \ube44\ud65c\uc131\ud654 \ub610\ub294 \ub450 \ubc88\uc9f8 \uacb0\ud568 \uac00\ub2a5\uc131\uc740 \uc5ec\uc804\ud788 \ubc30\uc81c\ud558\uc9c0 \uc54a\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-be76f0b7\">4. \uad11\ud559\uc801 \uc77c\uce58 \uc5ec\ubd80 \ud655\uc778<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6029bfdf\">\uc804\uc1a1 \uc18d\ub3c4\uc640 PMD, \uad11\uc12c\uc720 \uc885\ub958, \ud30c\uc7a5, \ucee4\ub125\ud130 \uacc4\uc5f4 \ubc0f \uc5f0\ub9c8 \uc0c1\ud0dc, \uc774\uc911\uadf9\uc131 \ub610\ub294 BiDi \ud398\uc5b4\ub9c1, \uadf8\ub9ac\uace0 \uac01 \ubc29\ud5a5\uc758 \uc218\uc2e0 \uc804\ub825 \ubc94\uc704\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624. \ub2e8\uc21c\ud788 \ud638\ud658\ub418\ub294 \ucee4\ub125\ud130\uc77c \ubfd0\uc73c\ub85c\ub294 \ucda9\ubd84\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cea0e60b\">\ub124\ud2b8\uc6cc\ud06c \uc18c\uc720\uc790\uac00 \uc2b9\uc778\ud55c \uc808\ucc28\uc5d0 \ub530\ub77c \uc811\uadfc \uac00\ub2a5\ud55c \ucee4\ub125\ud130\ub97c \uc810\uac80\ud558\uace0 \uccad\uc18c\ud558\uc2ed\uc2dc\uc624. \ud574\ub2f9 <a href=\"https:\/\/foa.org\/tech\/ref\/testing\/test\/scope.html\" target=\"_blank\" rel=\"noopener\">\uad11\uc12c\uc720 \ud611\ud68c \ucee4\ub125\ud130 \uac00\uc774\ub4dc<\/a> \uc624\uc5fc\uc774 \uc5b4\ub5bb\uac8c \uc190\uc2e4\uacfc \ubc18\uc0ac\uc728\uc744 \uc720\ubc1c\ud558\uba70, \uacb0\ud569\ub41c \ud398\ub8f0 \uac04\uc5d0 \uc804\ud30c\ub420 \uc218 \uc788\ub294\uc9c0\ub97c \uc124\uba85\ud569\ub2c8\ub2e4. \uc808\ub300\ub85c \uad11\uc12c\uc720\ub098 \uad11 \ud3ec\ud2b8\ub97c \uc9c1\uc811 \ub4e4\uc5ec\ub2e4\ubcf4\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \uc801\uc808\ud55c \ud30c\uc6cc \ubbf8\ud130\uc640 \uc601\uc0c1 \uac80\uc0ac \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-59a1521d\">5. \uad6c\uc131 \uc694\uc18c \ud558\ub098\ub97c \ubd84\ub9ac\ud55c\ub2e4<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-af1656ae\">\uc2b9\uc778\ub41c \uc720\uc9c0\ubcf4\uc218 \uc2dc\uac04 \ub3d9\uc548, \uc815\uc0c1 \uc791\ub3d9\uc774 \ud655\uc778\ub418\uace0 \uc0ac\uc591\uc774 \uc62c\ubc14\ub978 \ud328\uce58 \ucf00\uc774\ube14 \ub610\ub294 \ubaa8\ub4c8\ub85c \uad50\uccb4\ud55c \ud6c4 \ub3d9\uc77c\ud55c \uad00\ucc30\uc744 \ubc18\ubcf5\ud558\uc2ed\uc2dc\uc624. \uc624\ub958\uac00 \uc9c0\uc6d0\ub418\ub294 \ud3ec\ud2b8 \uac04\uc5d0 \ud2b9\uc815 \ubaa8\ub4c8 \ud558\ub098\uc5d0\uc11c\ub9cc \ubc1c\uc0dd\ud558\ub294 \uacbd\uc6b0, \ud574\ub2f9 \ubaa8\ub4c8\uc5d0 \ubb38\uc81c\uac00 \uc788\ub2e4\ub294 \uac00\uc124\uc774 \ub354\uc6b1 \ud655\uace0\ud574\uc9d1\ub2c8\ub2e4. RX LOS \uc624\ub958\uac00 \ud2b9\uc815 \uad11\uc12c\uc720 \ubc29\ud5a5\uc5d0\uc11c\ub9cc \ubc1c\uc0dd\ud558\ub294 \uacbd\uc6b0, \ud574\ub2f9 \uacbd\ub85c\ub97c \uc810\uac80\ud558\uc2ed\uc2dc\uc624. \ud2b9\uc815 \ud638\uc2a4\ud2b8 \ud3ec\ud2b8\uc5d0\uc11c\ub9cc \ubc1c\uc0dd\ud558\ub294 \uacbd\uc6b0, \ud574\ub2f9 \ud638\uc2a4\ud2b8\uc640 \uad6c\uc131\uc744 \uc870\uc0ac\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f8dcf4e9\">\ub85c\uceec \ub8e8\ud504\ubc31\uc744 \uc0ac\uc6a9\ud558\uba74 \ub85c\uceec \uacbd\ub85c\ub97c \ub2e8\ucd95\ud560 \uc218 \uc788\uc9c0\ub9cc, \uc774\ub294 PMD, \uad11\uc12c\uc720, \ucee4\ub125\ud130 \ubc0f \uc218\uc2e0\uae30 \uc804\ub825\uc774 \uc77c\uce58\ud55c \uacbd\uc6b0\uc5d0\ub9cc \uac00\ub2a5\ud569\ub2c8\ub2e4. LuLeey\uc758 <a href=\"https:\/\/www.luleey.com\/ko\/how-to-test-an-sfp-port-with-a-fiber-loopback\/\">\ud30c\uc774\ubc84 \ub8e8\ud504\ubc31 \ud14c\uc2a4\ud2b8 \uac00\uc774\ub4dc<\/a> \ub2e4\uc74c\uacfc \uac19\uc740 \ud55c\uacc4\ub97c \uc124\uba85\ud569\ub2c8\ub2e4. \uc131\uacf5\uc801\uc778 \ub8e8\ud504\ub294 \uc804\uc1a1 \ud2b8\ub801\ud06c\ub098 \uc6d0\uaca9 \ud53c\uc5b4\ub97c \ud14c\uc2a4\ud2b8\ud558\uc9c0 \uc54a\uc73c\uba70, \uc218\ub3d9\ud615 \uc140\ud504 \ub8e8\ud504\ub294 \ubcf4\uc644 \ud30c\uc7a5\uc744 \uc0ac\uc6a9\ud558\ub294 \uc591\ubc29\ud5a5(BiDi) \uad11\ud559 \uc18c\uc790\uc5d0 \ub300\ud55c \uc720\ud6a8\ud55c \uc77c\ubc18 \ud14c\uc2a4\ud2b8\uac00 \uc544\ub2d9\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-eca936c6\">6. \uc0c1\ud0dc\ubfd0\ub9cc \uc544\ub2c8\ub77c \ud2b8\ub798\ud53d\ub3c4 \uac80\uc99d\ud558\uc2ed\uc2dc\uc624<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f165184f\">\uc0c1\ud0dc\uac00 \ud574\uc81c\ub41c \ud6c4, \uc591\ubc29\ud5a5 \ubaa8\ub450\uc5d0\uc11c \uc548\uc815\uc801\uc778 \ub9c1\ud06c \uc0c1\ud0dc, \uc2e4\uc81c \uc804\uc1a1 \uc18d\ub3c4 \ubc0f \uc0c8\ub85c\uc6b4 \uce74\uc6b4\ud130 \uc99d\ubd84\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. RX LOS\uac00 \ud574\uc81c\ub418\uc5c8\ub2e4\ub294 \uac83\uc740 \ub2e8\uc9c0 \ud574\ub2f9 \uc190\uc2e4 \ud45c\uc2dc\uac00 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc558\uc74c\uc744 \uc758\ubbf8\ud560 \ubfd0\uc785\ub2c8\ub2e4. \uc774\ub294 \uc774\ub354\ub137 \ud504\ub808\uc784\uc774 \uc624\ub958\uac00 \uc5c6\uac70\ub098 \uc608\uc0c1\ub41c \ucc98\ub9ac\ub7c9\uc744 \ubcf4\uc7a5\ud55c\ub2e4\ub294 \uac83\uc744 \uc99d\uba85\ud558\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2d5d1d13\">\ub9c1\ud06c \uc0c1\ud0dc\ub294 \uc815\uc0c1\uc774\uc9c0\ub9cc FCS\/CRC \uc624\ub958\uac00 \uc99d\uac00\ud558\ub294 \uacbd\uc6b0, LuLeey\uc758 \ubc29\ubc95\uc744 \uacc4\uc18d \uc9c4\ud589\ud558\uc2ed\uc2dc\uc624. <a href=\"https:\/\/www.luleey.com\/ko\/sfp-crc-errors-with-normal-rx-power-what-to-check\/\">SFP CRC \ubb38\uc81c \ud574\uacb0 \uccb4\ud06c\ub9ac\uc2a4\ud2b8<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-72dab416\">\ud53c\ud574\uc57c \ud560 \ud754\ud55c \uc2e4\uc218\ub4e4<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B\uac00 RX LOS\ub97c \ubcf4\uace0\ud588\ub2e4\ub294 \uc774\uc720\ub9cc\uc73c\ub85c B\uc758 \uc218\uc2e0\uae30\ub97c \uad50\uccb4\ud558\ub294 \uac83<\/li>\n\n\n\n<li>TX Disable\ub97c TX \uc624\ub958\uc758 \uc99d\uac70\ub85c \uac04\uc8fc<\/li>\n\n\n\n<li>\ud55c \uad11\ud559 \ubc29\ud5a5\uc5d0 \ub300\ud55c \ub85c\uceec TX \ubc0f \ub85c\uceec RX \uac12 \uc77d\uae30<\/li>\n\n\n\n<li>\uad11\ud559 \ubd80\ud488\uacfc \ud328\uce58 \ucf00\uc774\ube14\uc744 \ubaa8\ub450 \ud55c \ubc88\uc5d0 \uad50\uccb4\ud558\uae30<\/li>\n\n\n\n<li>\uc815\ud655\ud55c \ub370\uc774\ud130 \uc2dc\ud2b8 \ub300\uc2e0 \uc77c\ubc18\uc801\uc778 \ud30c\uc7a5\uc774\ub098 dBm \uae30\uc900\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83<\/li>\n\n\n\n<li>\ud2b8\ub798\ud53d\uacfc \uce74\uc6b4\ud130\ub97c \ud655\uc778\ud558\uc9c0 \uc54a\uace0 \uc54c\ub78c\uc774 \ud574\uc81c\ub418\uba74 \uc131\uacf5\uc73c\ub85c \ud310\uc815\ud558\uae30<\/li>\n\n\n\n<li>\ud638\uc2a4\ud2b8 SerDes, \uc804\uc1a1 \uc18d\ub3c4, FEC, \ucf54\ub529, \ud38c\uc6e8\uc5b4 \ub610\ub294 \ud3ec\ud2b8 \uc124\uc815\uc744 \ubb34\uc2dc\ud568<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5795d495\">\uc774 \uc6cc\ud06c\ud50c\ub85c\ub294 PON \ub4f1\ub85d \uac00\uc774\ub4dc\uac00 \uc544\ub2d9\ub2c8\ub2e4. 2.5G PON ONU \uc2a4\ud2f1\uc5d0\ub294 ONU \ub85c\uc9c1\uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\uc5b4 \ud638\uc2a4\ud2b8 \ub3d9\uc791\uc774 \ub2e4\ub974\uac8c \ub098\ud0c0\ub0a0 \uc218 \uc788\uc2b5\ub2c8\ub2e4. 1G\/10G SFP+ \ud638\uc2a4\ud2b8\ub294 \uc2a4\ud2f1\uacfc \ud638\uc2a4\ud2b8 \ubaa8\ub450\uac00 \ud638\ud658\ub418\ub294 1G \ubaa8\ub4dc\ub97c \uc9c0\uc6d0\ud558\ub294 \uacbd\uc6b0\uc5d0\ub9cc 1G \uc18d\ub3c4\ub85c \uc774 \uc7a5\uce58\ub97c \uc5f0\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubd80 SFP+ \ud3ec\ud2b8\ub294 \uc801\uc808\ud55c \uce69\uc14b\/PHY, \ud38c\uc6e8\uc5b4 \ub610\ub294 \ub4dc\ub77c\uc774\ubc84, \ud3ec\ud2b8 \uc124\uc815, \ubaa8\ub4c8 \ucf54\ub529 \ubc0f \uc2a4\ud2f1 \ud638\uc2a4\ud2b8 \ubaa8\ub4dc\uac00 \uac16\ucdb0\uc838\uc57c\ub9cc 2.5G\ub97c \uc9c0\uc6d0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-4454f2f7\">LuLeey \uc7a5\ube44\uc758 \uc801\uc6a9 \ubd84\uc57c<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9a4475c4\">\ud1b5\uc81c\ub41c \uad6d\uc18c \ub2e4\uc911 \ubaa8\ub4dc \ud14c\uc2a4\ud2b8\ub97c \uc704\ud574, LuLeey\uc758 <a href=\"https:\/\/www.luleey.com\/ko\/product\/fiber-optic-loopback-lc-upc-om3-mm\/\">LC\/UPC OM3 \uad11\uc12c\uc720 \ub8e8\ud504\ubc31<\/a> \uc774 \ud398\uc774\uc9c0\uc5d0\ub294 50\/125 \u00b5m \uba40\ud2f0\ubaa8\ub4dc \uacbd\ub85c, LC\/UPC \uc778\ud130\ud398\uc774\uc2a4, 0.2 dB \uc774\ud558\uc758 \uc0bd\uc785 \uc190\uc2e4\uc774 \uba85\uc2dc\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0ac\uc591\ub9cc\uc73c\ub85c\ub294 \uc774 \uc81c\ud488\uc774 \ubc94\uc6a9\uc801\uc73c\ub85c \uc0ac\uc6a9\ub420 \uc218 \uc788\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4. \uc774 \uc218\uce58\ub294 \ucd5c\ub300 \uc190\uc2e4 \uac12\uc77c \ubfd0, \ubcf4\uc7a5\ub41c \ubcf4\ud638 \uac10\uc1e0\ub7c9\uc774 \uc544\ub2c8\ubbc0\ub85c, \uc9e7\uc740 \ub8e8\ud504\ub97c \uad6c\uc131\ud558\uae30 \uc804\uc5d0 \uc815\ud655\ud55c PMD \ubc0f \uc218\uc2e0\uae30\uc758 \ucd5c\ub300 \uc785\ub825\uac12\uc744 \ud655\uc778\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-15a60686\">\uad50\uccb4 \ub610\ub294 \ud638\ud658\uc131 \ud655\uc778\uc744 \uc704\ud574 LuLeey\uc5d0 \ud638\uc2a4\ud2b8 \ubaa8\ub378, \ubaa8\ub4c8 \ub77c\ubca8 \ubc0f \ub9ac\ube44\uc804, \ud38c\uc6e8\uc5b4, \ud3ec\ud2b8 \ubaa8\ub4dc, \uad11\uc12c\uc720 \ubc0f \ucee4\ub125\ud130 \uc138\ubd80 \uc815\ubcf4, \uc591\ucabd \ub05d\ub2e8\uc758 TX Fault\/RX LOS\/TX Disable \uc0c1\ud0dc, \uc804\uccb4 DDM \uc2a4\ub0c5\uc0f7, \ub9c1\ud06c \uc774\ubca4\ud2b8 \ud0c0\uc784\uc2a4\ud0ec\ud504 \ubc0f \uce74\uc6b4\ud130 \ub378\ud0c0\ub97c \ubaa8\ub450 \ubcf4\ub0b4\uc8fc\uc2ed\uc2dc\uc624.<\/p>","protected":false},"excerpt":{"rendered":"<p>\uc7a5\uce58 B\uc5d0 \ud45c\uc2dc\ub41c \uc0c1\ud0dc \ubaa8\ub4c8\uc774 \ubcf4\uace0\ud558\ub294 \ub0b4\uc6a9 \uc6b0\uc120\uc801\uc73c\ub85c \ud655\uc778\ud574\uc57c \ud560 \uc0ac\ud56d \uc785\uc99d\ub418\uc9c0 \uc54a\ub294 \uc0ac\ud56d RX<\/p>","protected":false},"author":1,"featured_media":22362,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[886],"tags":[69,1680,1642,1669,1682,71,1681],"class_list":["post-22361","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-network-maintenance","tag-sfp","tag-loss-of-signal","tag-network-maintenance","tag-optical-troubleshooting","tag-rx-los","tag-sfp-2","tag-tx-fault"],"_links":{"self":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts\/22361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/comments?post=22361"}],"version-history":[{"count":1,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts\/22361\/revisions"}],"predecessor-version":[{"id":22372,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts\/22361\/revisions\/22372"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/media\/22362"}],"wp:attachment":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/media?parent=22361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/categories?post=22361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/tags?post=22361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}