{"id":21825,"date":"2026-08-18T12:06:38","date_gmt":"2026-08-18T04:06:38","guid":{"rendered":"https:\/\/www.luleey.com\/?p=21825"},"modified":"2026-08-18T23:45:10","modified_gmt":"2026-08-18T15:45:10","slug":"fiber-link-down-how-to-check-tx-rx-polarity","status":"publish","type":"post","link":"https:\/\/www.luleey.com\/ko\/fiber-link-down-how-to-check-tx-rx-polarity\/","title":{"rendered":"\uad11\ucf00\uc774\ube14 \uc5f0\uacb0\uc774 \ub04a\uc5b4\uc84c\ub098\uc694? \uad11\ucf00\uc774\ube14 \uc1a1\uc2e0(Tx)\/\uc218\uc2e0(Rx) \uadf9\uc131\uc744 \ud655\uc778\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"<h1 class=\"wp-block-wd-title title wd-7800cd0b\"><a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/fiber-link-down\/\" title=\"&#039;Fiber Link Down&#039;\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">\uad11\uc12c\uc720 \ud68c\uc120 \uc7a5\uc560<\/a>? \uc1a1\uc2e0(Tx)\/\uc218\uc2e0(Rx) \uadf9\uc131 \ud655\uc778 \ubc29\ubc95<\/h1>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bac767c7\">SFP \ubaa8\ub4c8\uc774 \uac10\uc9c0\ub418\uace0 \uad11\ucf00\uc774\ube14\ub3c4 \uc5f0\uacb0\ub418\uc5b4 \uc788\uc9c0\ub9cc, \ub9c1\ud06c \ud45c\uc2dc\ub4f1\uc774 \uaebc\uc9c4 \uc0c1\ud0dc\uc785\ub2c8\ub2e4. \ud2b8\ub79c\uc2dc\ubc84\ub098 \ud328\uce58 \ucf00\uc774\ube14\uc744 \uad50\uccb4\ud558\uae30 \uc804\uc5d0 \ub2e4\uc74c \uc0ac\ud56d\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. <strong>\uc12c\uc720 <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/tx-rx\/\" title=\"Tx Rx\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">Tx Rx<\/a> \uadf9\uc131<\/strong>.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-b4cdab7b\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"630\" class=\"wp-image-21831\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero.png 1200w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero-800x420.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero-768x403.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero-18x9.png 18w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/fiber-tx-rx-polarity-hero-150x79.png 150w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/div>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cc9f488f\"><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bde59305\">\uc77c\ubc18\uc801\uc778 2\uac00\ub2e5 \uad11\uc12c\uc720 \uc5f0\uacb0\uc758 \uacbd\uc6b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub85c\uceec \uc1a1\uc2e0\uae30(Tx)\ub294 \uc6d0\uaca9 \uc218\uc2e0\uae30(Rx)\uc5d0 \uc5f0\uacb0\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub85c\uceec Rx\ub294 \uc6d0\uaca9 Tx\uc5d0 \uc5f0\uacb0\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-695ea3fb\">Tx\ub97c Tx\uc5d0, Rx\ub97c Rx\uc5d0 \uc5f0\uacb0\ud558\uba74 \uc77c\ubc18\uc801\uc73c\ub85c \ub9c1\ud06c\uac00 \uc124\uc815\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-64dd07e3\">\ub2e4\ud589\uc778 \uc810\uc740 \uc774 \ubb38\uc81c\ub97c \ud655\uc778\ud558\ub294 \ub370 \ubcf4\ud1b5 \uba87 \ubd84\ubc16\uc5d0 \uac78\ub9ac\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-69eed6ec\">\uac04\ub2e8\ud55c \ub2f5\ubcc0<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d0026c02\">\ub9cc\uc57d \uc5ec\ub7ec\ubd84\uc774 <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ko\/tag\/duplex-lc\/\" title=\"Duplex LC\uc758 \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \ubcf4\uae30\">\uc774\uc911 LC<\/a> \ub610\ub294 \uc774\uc911 SC \uc5f0\uacb0\uc758 \uacbd\uc6b0, \ub2e4\uc74c \uc704\uce58\uc5d0\uc11c \ub450 \uad11\uc12c\uc720 \uac00\ub2e5\uc744 \uc11c\ub85c \ubc14\uafd4\uc8fc\uc2ed\uc2dc\uc624. <strong>\ud55c\ucabd \ub05d\ub9cc<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub9c1\ud06c\uac00 \ud45c\uc2dc\ub41c\ub2e4\uba74, \uc6d0\ub798\uc758 \uadf9\uc131\uc774 \ubc18\uc804\ub41c \uac83\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub9c1\ud06c \uc0c1\ud0dc\uac00 \uc5ec\uc804\ud788 \ube44\ud65c\uc131\ud654\ub41c \uacbd\uc6b0, \uc6d0\ub798\uc758 \uc5f0\uacb0 \uc0c1\ud0dc\ub85c \ub418\ub3cc\ub9b0 \ud6c4 \ubaa8\ub4c8, \uad11\uc12c\uc720 \uc720\ud615, \ud30c\uc7a5 \ubc0f \uad11\ucd9c\ub825\uc744 \uacc4\uc18d \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-62262e0c\">\ub2e8\uc77c \uad11\uc12c\uc720 BiDi, PON, AOC \ub610\ub294 MPO \uc5f0\uacb0\uc5d0\uc11c\ub294 \uc774 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\uc9c0 \ub9c8\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-fc3258c6\">\uc774 \ud14c\uc2a4\ud2b8\uac00 \uadc0\ud558\uc758 \uad11\uc12c\uc720 \ub9c1\ud06c\uc5d0 \uc801\uc6a9\ub418\ub098\uc694?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dfa2144d\">\ub2e4\uc74c\uacfc \uac19\uc740 \uc5f0\uacb0 \ud658\uacbd\uc77c \ub54c\ub9cc \uac00\ub2e5 \uad50\ud658 \ud14c\uc2a4\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub450 \uac1c\uc758 \ubcc4\uac1c\uc758 \uad11\uc12c\uc720 \uac00\ub2e5;<\/li>\n\n\n\n<li>\uc774\uc911 \uad11 \uc778\ud130\ud398\uc774\uc2a4(\uc77c\ubc18\uc801\uc73c\ub85c \uc774\uc911 LC);<\/li>\n\n\n\n<li>\uc804\uc1a1\uc6a9 \uac00\ub2e5 \ud558\ub098;<\/li>\n\n\n\n<li>\uc218\uc2e0\uc6a9 \uac00\ub2e5 \ud558\ub098.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-aae582cd\">\uc804\ud615\uc801\uc778 \uc608\ub85c\ub294 \ub450 \uac1c\uc758 \ud45c\uc900 \ub4c0\ud50c\ub809\uc2a4 SFP \ub610\ub294 SFP+ \ud2b8\ub79c\uc2dc\ubc84\ub97c \uc0ac\uc6a9\ud558\ub294 \uc2a4\uc704\uce58 \uac04 \uc5f0\uacb0\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4aceb924\">\ub2e4\uc74c\uacfc \uac19\uc740 \uc0c1\ud669\uc5d0\uc11c\ub294 \uac00\ub2e5\uc744 \ubc14\uafb8\uc9c0 \ub9c8\uc2ed\uc2dc\uc624:<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-b2118262\">\ub2e8\uc77c \uad11\uc12c\uc720 \uc591\ubc29\ud5a5(BiDi) \ud2b8\ub79c\uc2dc\ubc84<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9a678b7e\">BiDi \ud2b8\ub79c\uc2dc\ubc84\ub294 \ub450 \uac00\uc9c0 \uc11c\ub85c \ub2e4\ub978 \ud30c\uc7a5\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub3d9\uc77c\ud55c \uad11\uc12c\uc720\ub97c \ud1b5\ud574 \uc2e0\ud638\ub97c \uc1a1\uc218\uc2e0\ud569\ub2c8\ub2e4. \ubcc4\ub3c4\uc758 \uc1a1\uc2e0(Tx) \ubc0f \uc218\uc2e0(Rx) \uad11\uc12c\uc720\ub97c \uad50\uccb4\ud560 \ud544\uc694\uac00 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0b917fe3\">\ub300\uc2e0, \ub450 BiDi \ubaa8\ub4c8\uc774 \uc11c\ub85c \ubcf4\uc644\uc801\uc778 \uc1a1\uc2e0(Tx) \ubc0f \uc218\uc2e0(Rx) \ud30c\uc7a5\uc744 \uc0ac\uc6a9\ud558\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-34c3e326\">\uc608\ub97c \ub4e4\uc5b4, 1270 nm\uc5d0\uc11c \uc1a1\uc2e0\ud558\ub294 \ubaa8\ub4c8\uc740 \uc77c\ubc18\uc801\uc73c\ub85c 1270 nm\uc5d0\uc11c \uc218\uc2e0\ud558\uace0, \uc774\uc5d0 \uc0c1\uc751\ud558\ub294 \ubc18\uc0ac \ud30c\uc7a5\uc5d0\uc11c \uc1a1\uc2e0\ud558\ub294 \ubaa8\ub4c8\uacfc \uc5f0\uacb0\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ee96bfd5\">LuLeey \uac00\uc774\ub4dc\ub97c \ud655\uc778\ud574 \ubcf4\uc138\uc694: <a href=\"https:\/\/www.luleey.com\/ko\/sfp-10g-bx10-d-vs-sfp-10g-bx10-u-what-is-the-difference\/\">SFP-10G-BX10-D \ub300 SFP-10G-BX10-U<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-619e152a\">GPON, EPON \ubc0f XGS-PON<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-eba03f48\">PON \uc5f0\uacb0\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud558\ud5a5 \ubc0f \uc0c1\ud5a5 \ud1b5\uc2e0 \ubaa8\ub450\uc5d0 \ud558\ub098\uc758 \uad11\uc12c\uc720\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc774\uc911 \ubc29\uc2dd\uc758 \uac00\ub2e5 \uad50\uccb4 \ud14c\uc2a4\ud2b8\ub294 \uc801\uc6a9\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-24295972\">AOC \ucf00\uc774\ube14<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7c114fea\">\uc561\ud2f0\ube0c \uad11\ucf00\uc774\ube14\uc5d0 \ud3ec\ud568\ub41c \uad11\uc12c\uc720\uc640 \ud2b8\ub79c\uc2dc\ubc84\ub294 \uacf5\uc7a5\uc5d0\uc11c \ud558\ub098\uc758 \uc644\uc804\ud55c \uc870\ub9bd\uccb4\ub85c \ubbf8\ub9ac \uc5f0\uacb0\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc0ac\uc6a9\uc790\uac00 \ub0b4\ubd80 \uad11\uc12c\uc720 \uacbd\ub85c\ub97c \ubc18\ub300\ub85c \ubc14\uafc0 \uc218\ub294 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-a091f18c\">MPO\/MTP \uc5f0\uacb0<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5c66fb94\">MPO\/MTP \uc2dc\uc2a4\ud15c\uc740 \uc5ec\ub7ec \uac1c\uc758 \uad11\uc12c\uc720\uc640 \ud2b9\uc815 \uadf9\uc131 \uc9c0\uc815 \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uac1c\ubcc4 \uad11\uc12c\uc720\uc758 \uadf9\uc131\uc744 \uc784\uc758\ub85c \ubc18\uc804\uc2dc\ud0a4\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \ud574\ub2f9 \ub9c1\ud06c\uc5d0 \ubc29\ubc95 A, \ubc29\ubc95 B, \ubc29\ubc95 C \uc911 \uc5b4\ub5a4 \ubc29\uc2dd\uc774 \ud544\uc694\ud55c\uc9c0, \uc544\ub2c8\uba74 \uc77c\uce58\ud558\ub294 \ubd84\ubc30 \uad6c\uc131\uc774 \ud544\uc694\ud55c\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-9eee6eea\">\uad11\uc12c\uc720 \uc1a1\uc2e0(Tx)\/\uc218\uc2e0(Rx) \uadf9\uc131 \ud655\uc778 \ubc29\ubc95<\/h2>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d10b746e\">1\ub2e8\uacc4: 2\uac00\ub2e5 \uad11\uc12c\uc720 \ub9c1\ud06c\uc778\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fb420ba6\">\uad11\ud559 \uc5f0\uacb0\ubd80\ub97c \uc0b4\ud3b4\ubcf4\uc138\uc694.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a26dce53\">\ub4c0\ud50c\ub809\uc2a4 LC \uc5f0\uacb0\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ub450 \uac1c\uc758 \uc791\uc740 LC \ucee4\ub125\ud130\uac00 \uc11c\ub85c \uacb0\ud569\ub41c \ud615\ud0dc\uc785\ub2c8\ub2e4. \ud55c \uad11\uc12c\uc720\ub294 \ud55c \ubc29\ud5a5\uc73c\ub85c \uc2e0\ud638\ub97c \uc804\uc1a1\ud558\uace0, \ub2e4\ub978 \uad11\uc12c\uc720\ub294 \ubc18\uc1a1 \uc2e0\ud638\ub97c \uc804\uc1a1\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f42b0747\">\uc5f0\uacb0\uc5d0 \uad11\uc12c\uc720\uac00 \ud558\ub098\ub9cc \uc0ac\uc6a9\ub418\ub294 \uacbd\uc6b0, \uc5ec\uae30\uc11c \uc911\uc9c0\ud558\uc2ed\uc2dc\uc624. BiDi \ub610\ub294 PON \ub9c1\ud06c\uc77c \uc218 \uc788\uc73c\uba70, \uc774 \ud14c\uc2a4\ud2b8\ub294 \ud574\ub2f9\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-420f5ba8\">2\ub2e8\uacc4: \ud604\uc7ac \uc5f0\uacb0 \uc0c1\ud0dc \uae30\ub85d\ud558\uae30<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ed714dfe\">\ubb34\uc5b8\uac00\ub97c \ubcc0\uacbd\ud558\uae30 \uc804\uc5d0 \ub450 \uac00\ub2e5\uc758 \uad11\uc12c\uc720\uc5d0 \uc0ac\uc9c4\uc744 \ucc0d\uac70\ub098 \ud45c\uc2dc\ub97c \ud574 \ub450\uc138\uc694.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-93fe5d3b\">\ub530\ub77c\uc11c \uadf9\uc131 \ubb38\uc81c\uac00 \uc6d0\uc778\uc774 \uc544\ub2cc \uacbd\uc6b0, \uc6d0\ub798\uc758 \uc5f0\uacb0 \uc0c1\ud0dc\ub97c \uc27d\uac8c \ubcf5\uc6d0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c0599d27\">\uad11 \ud3ec\ud2b8\ub098 \uad11\uc12c\uc720 \ucee4\ub125\ud130 \uc548\uc744 \ub4e4\uc5ec\ub2e4\ubcf4\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \uad11 \uc2e0\ud638\ub294 \uc721\uc548\uc73c\ub85c\ub294 \ubcf4\uc774\uc9c0 \uc54a\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \uc9c0\uce68\uc744 \ub530\ub974\uc2ed\uc2dc\uc624. <a href=\"https:\/\/www.thefoa.org\/tech\/ref\/safety\/safe.html\" target=\"_blank\" rel=\"noopener\">\uad11\uc12c\uc720 \ud611\ud68c\uc758 \uad11\uc12c\uc720 \uc548\uc804 \uc9c0\uce68<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-3aaf41b9\">3\ub2e8\uacc4: \ud55c\ucabd \ub05d\uc5d0\uc11c \ub450 \uac00\ub2e5\uc758 \uc704\uce58\ub97c \ubc14\uafd4\uc90d\ub2c8\ub2e4.<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0881defb\">\ub9c1\ud06c\uc758 \ud55c\ucabd \ub05d\uc744 \uc120\ud0dd\ud558\uace0 \ub450 \uad11\uc12c\uc720\uc758 \uc704\uce58\ub97c \ubc14\uafb8\uc2ed\uc2dc\uc624:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\ub450 \uad11 \ucee4\ub125\ud130\ub97c \uc870\uc2ec\uc2a4\ub7fd\uac8c \ubd84\ub9ac\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\uccab \ubc88\uc9f8 \uac00\ub2e5\uc744 \uc774\uc804\uc5d0 \ub450 \ubc88\uc9f8 \uac00\ub2e5\uc774 \uc788\ub358 \uc704\uce58\ub85c \uc62e\uae41\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub450 \ubc88\uc9f8 \uac00\ub2e5\uc744 \uccab \ubc88\uc9f8 \uc704\uce58\ub85c \uc62e\uae41\ub2c8\ub2e4.<\/li>\n\n\n\n<li>\ub450 \uad11\uc12c\uc720\ub97c \uc644\uc804\ud788 \ub2e4\uc2dc \uc5f0\uacb0\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ubc18\ub300\ucabd \ub05d\uc740 \uadf8\ub300\ub85c \ub450\uc138\uc694.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f6bfea2c\">\ud55c\ucabd \ub05d\uc758 \uac00\ub2e5\ub9cc \ubc14\uafd4\uc8fc\uc138\uc694. \uc591\ucabd \ub05d\uc744 \ubaa8\ub450 \ubc14\uafb8\uba74 \ub300\uac1c \uc6d0\ub798\uc758 \uadf9\uc131\uc774 \ubcf5\uc6d0\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a0a14405\">LC \ucee4\ub125\ud130\uac00 \uace0\uc815\ud615 \ub4c0\ud50c\ub809\uc2a4 \ud074\ub9bd \uc548\uc5d0 \uc7a0\uaca8 \uc788\ub294 \uacbd\uc6b0, \ud074\ub9bd\uc744 \uc5b5\uc9c0\ub85c \ubc8c\ub9ac\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \uc9c0\uc6d0\ub418\ub294 \uadf9\uc131 \ubc18\uc804 \uc7a5\uce58\ub97c \uc0ac\uc6a9\ud558\uac70\ub098, \ud328\uce58 \ud328\ub110\uc5d0\uc11c \ud398\uc5b4\ub97c \ubc18\uc804\uc2dc\ud0a4\uac70\ub098, \uadf9\uc131 \ubc18\uc804\uc774 \uac00\ub2a5\ud55c \ub4c0\ud50c\ub809\uc2a4 \ud328\uce58 \ucf00\uc774\ube14\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-45eefcba\">4\ub2e8\uacc4: \ub9c1\ud06c \ud45c\uc2dc\ub4f1\uc744 \ud655\uc778\ud558\uc138\uc694<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4349534f\">\uc2a4\uc704\uce58, \ub77c\uc6b0\ud130 \ub610\ub294 \ub124\ud2b8\uc6cc\ud06c \uce74\ub4dc\uac00 \uc815\uc0c1\uc801\uc778 \ub9c1\ud06c \ucd08\uae30\ud654\ub97c \uc644\ub8cc\ud560 \ub54c\uae4c\uc9c0 \uae30\ub2e4\ub9ac\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f8938d4d\">\uadf8\ub7f0 \ub2e4\uc74c \ud3ec\ud2b8 \uc0c1\ud0dc\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\uac80\uc0ac \uacb0\uacfc<\/th><th>\uadf8 \uc758\ubbf8\ub294 \ubb34\uc5c7\uc778\uac00<\/th><\/tr><\/thead><tbody><tr><td>\ub9c1\ud06c\uac00 \ub098\ud0c0\ub0a9\ub2c8\ub2e4<\/td><td>\uc6d0\ub798\uc758 \uc1a1\uc2e0\/\uc218\uc2e0 \uadf9\uc131\uc774 \ubc18\ub300\ub85c \uc124\uc815\ub418\uc5b4 \uc788\uc5c8\uc2b5\ub2c8\ub2e4.<\/td><\/tr><tr><td>\ub9c1\ud06c\uac00 \uc5ec\uc804\ud788 \uc811\uc18d\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4<\/td><td>\uadf9\uc131\uc774 \uc8fc\ub41c \ubb38\uc81c\uac00 \uc544\ub2d0 \uc218\ub3c4 \uc788\ub2e4<\/td><\/tr><tr><td>\ub9c1\ud06c\uac00 \uacc4\uc18d\ud574\uc11c \uc62c\ub77c\uac14\ub2e4 \ub0b4\ub824\uac14\ub2e4 \ud55c\ub2e4<\/td><td>\ucee4\ub125\ud130\uc758 \uccad\uacb0 \uc0c1\ud0dc, \uad11 \ucd9c\ub825 \ubc0f \ud3ec\ud2b8 \uc124\uc815\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/td><\/tr><tr><td>\ud55c\ucabd\uc5d0\uc11c\ub9cc \uad11 \ucd9c\ub825\uc744 \uc218\uc2e0\ud569\ub2c8\ub2e4<\/td><td>\ub9ac\ud134 \uc2a4\ud2b8\ub79c\ub4dc, \ucee4\ub125\ud130 \ubc0f \uc6d0\uaca9 \uc1a1\uc2e0\uae30\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8f934366\">\uadf8\ub9ac\uace0 <a href=\"https:\/\/www.thefoa.org\/tech\/ref\/install\/polarity.html\" target=\"_blank\" rel=\"noopener\">FOA \ub9c1\ud06c \uadf9\uc131 \uc548\ub0b4\uc11c<\/a> \uad11\uc12c\uc720 \ud68c\uc120\uc774 \uc65c \uc62c\ubc14\ub978 \uc1a1\uc2e0-\uc218\uc2e0 \uacbd\ub85c\ub97c \uc720\uc9c0\ud574\uc57c \ud558\ub294\uc9c0 \uc124\uba85\ud569\ub2c8\ub2e4. \ub300\uc911\uc740 <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc5171\" target=\"_blank\" rel=\"noopener\">IETF RFC 5171<\/a> \ub610\ud55c \uc798\ubabb\ub41c \uad11\uc12c\uc720 \ud328\uce58 \uc791\uc5c5\uc774 \uc5b4\ub5bb\uac8c \uc720\ud6a8\ud558\uc9c0 \uc54a\uc740 \ud1b5\uc2e0 \uacbd\ub85c\ub098 \ub2e8\ubc29\ud5a5 \ud1b5\uc2e0 \uacbd\ub85c\ub97c \uc0dd\uc131\ud560 \uc218 \uc788\ub294\uc9c0\uc5d0 \ub300\ud574\uc11c\ub3c4 \uc124\uba85\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a82ed790\"><\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-f941bb37\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"800\" class=\"wp-image-21833\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0.png 1200w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0-800x533.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0-768x512.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0-18x12.png 18w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/08\/content_idfile_00000000c3548246ba71fd9e71afc4d1ts496407pfscid1sig8a5fdf0e23eb93af1d9ea92c99785a15db3ef4badce37e0671c86b4b4a5abde7v0-150x100.png 150w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-5e0c582b\">\ub9c1\ud06c\uac00 \ud45c\uc2dc\ub418\uba74 \uc5b4\ub5bb\uac8c \ud574\uc57c \ud560\uae4c\uc694?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6f87768f\">\ub450 \uac00\ub2e5\uc744 \ubc14\uafd4 \ub07c\uc6b4 \ud6c4 \ub9c1\ud06c\uac00 \uc815\uc0c1\uc801\uc73c\ub85c \uc791\ub3d9\ud55c\ub2e4\uba74:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\uc791\ub3d9 \uadf9\uc131\uc744 \uc720\uc9c0\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ub450 \uac00\ub2e5 \ubaa8\ub450\uc5d0 \ub77c\ubca8\uc744 \ubd99\uc774\uc138\uc694.<\/li>\n\n\n\n<li>\uc591\ucabd \ub05d\uc758 \uc5f0\uacb0 \uc0c1\ud0dc\ub97c \uae30\ub85d\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ucf00\uc774\ube14\uc774 \ub108\ubb34 \uaebe\uc774\uc9c0 \uc54a\ub3c4\ub85d \uace0\uc815\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ub9c1\ud06c \uc18d\ub3c4\uac00 \uc62c\ubc14\ub978\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ud328\ud0b7 \uc624\ub958\ub098 \ubd88\uc548\uc815\ud55c \uc791\ub3d9 \uc5ec\ubd80\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-069fb2b4\">\ubc18\ub4dc\uc2dc \ucf00\uc774\ube14\uc744 \uad50\uccb4\ud574\uc57c \ud558\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4. \ub2e4\ub9cc, \ud604\uc7ac \uc5f0\uacb0 \uc0c1\ud0dc\uc5d0\uc11c \uac15\uc81c\ub85c \ub07c\uc6cc \ub123\uac70\ub098 \ubd84\ud574\ud574\uc57c \ud558\uac70\ub098 \ucee4\ub125\ud130\ub97c \uc81c\ub300\ub85c \uace0\uc815\ud558\uc9c0 \ubabb\ud55c \ucc44\ub85c \ub450\uc5b4\uc57c \ud558\ub294 \uacbd\uc6b0\uc5d0\ub294, \ubc30\uc120\uc774 \uc62c\ubc14\ub974\uac8c \ub418\uc5b4 \uc788\uac70\ub098 \uadf9\uc131\uc744 \uc804\ud658\ud560 \uc218 \uc788\ub294 \ud328\uce58 \ucf00\uc774\ube14\uc744 \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-c0ed20e7\">Tx\/Rx\ub97c \uad50\uccb4\ud574\ub3c4 \ub9c1\ud06c \ubb38\uc81c\uac00 \ud574\uacb0\ub418\uc9c0 \uc54a\ub294\ub2e4\uba74 \uc5b4\ub5bb\uac8c \ud574\uc57c \ud560\uae4c\uc694?<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fa00746f\">\uc6d0\ub798\uc758 \uc5f0\uacb0\uc744 \ubcf5\uc6d0\ud55c \ud6c4, \ub2e4\uc74c \ud56d\ubaa9\uc744 \uc21c\uc11c\ub300\ub85c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1512a2d1\">1. \ub450 \ud3ec\ud2b8 \ubaa8\ub450 \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uc2b5\ub2c8\uae4c?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0d403619\">\uc2a4\uc704\uce58, \ub77c\uc6b0\ud130 \ub610\ub294 \ub124\ud2b8\uc6cc\ud06c \uce74\ub4dc \uc124\uc815\uc5d0\uc11c \ub450 \uad11 \ud3ec\ud2b8\uac00 \ubaa8\ub450 \ube44\ud65c\uc131\ud654\ub418\uc9c0 \uc54a\uc558\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-c357fdf9\">2. \uc591\ucabd \ubaa8\ub450 \ub3d9\uc77c\ud55c \ub370\uc774\ud130 \uc804\uc1a1 \uc18d\ub3c4\ub97c \uc0ac\uc6a9\ud569\ub2c8\uae4c?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7fe06108\">1G \ud2b8\ub79c\uc2dc\ubc84\uc640 10G \ud2b8\ub79c\uc2dc\ubc84\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uc11c\ub85c \ud45c\uc900 \uc774\ub354\ub137 \ub9c1\ud06c\ub97c \uad6c\ucd95\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0cd9f7c9\">\ub610\ud55c \ud638\uc2a4\ud2b8 \ud3ec\ud2b8\uac00 \ud544\uc694\ud55c \uc18d\ub3c4\ub97c \uc9c0\uc6d0\ud558\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. SFP, SFP+ \ub610\ub294 SFP28\uc774\ub77c\ub294 \uba85\uce6d\ub9cc\uc73c\ub85c\ub294 \ubaa8\ub4e0 \uc911\uac04 \uc18d\ub3c4\ub97c \ubcf4\uc7a5\ud558\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-d2199fe0\">3. \ud2b8\ub79c\uc2dc\ubc84\ub294 \ud638\ud658 \uac00\ub2a5\ud55c \uad11\ud559 \ud45c\uc900\uc744 \uc0ac\uc6a9\ud569\ub2c8\uae4c?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b342a136\">\uc591\uce21 \ubaa8\ub450 \ud638\ud658\ub418\ub294 \ub2e4\uc74c\uc744 \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ub370\uc774\ud130 \uc804\uc1a1 \uc18d\ub3c4;<\/li>\n\n\n\n<li>\ud30c\uc7a5;<\/li>\n\n\n\n<li>\uc804\uc1a1 \uac70\ub9ac;<\/li>\n\n\n\n<li>\uc12c\uc720 \uc885\ub958;<\/li>\n\n\n\n<li>\uad11\ud559 \ud45c\uc900.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-880ccd7a\">\ub450 \ubaa8\ub4c8 \ubaa8\ub450 LC \ucee4\ub125\ud130\ub97c \uc7a5\ucc29\ud558\uace0 \uc788\ub2e4\uace0 \ud574\uc11c \ub2e8\uc21c\ud788 \ud638\ud658\ub41c\ub2e4\uace0 \uac00\uc815\ud574\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-6a520ded\">4. \uad11\uc12c\uc720 \uc720\ud615\uc774 \uc62c\ubc14\ub978\uac00\uc694?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-82907b9e\">\ub2e8\uc77c \ubaa8\ub4dc \ud2b8\ub79c\uc2dc\ubc84\uc5d0\ub294 \ub2e8\uc77c \ubaa8\ub4dc \uad11\uc12c\uc720\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c5adfa1b\">\ub2e4\uc911\ubaa8\ub4dc \ud2b8\ub79c\uc2dc\ubc84\uc5d0\ub294 \uc62c\ubc14\ub978 \ub2e4\uc911\ubaa8\ub4dc \uad11\uc12c\uc720\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624. OM1, OM2, OM3, OM4 \ubc0f OM5\ub294 \ubaa8\ub4e0 \uc18d\ub3c4\uc640 \uac70\ub9ac\uc5d0\uc11c \ub3d9\uc77c\ud55c \uc804\uc1a1 \uc131\ub2a5\uc744 \uc81c\uacf5\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1ddeb8fb\">5. \ucee4\ub125\ud130\uac00 \uae68\ub057\ud55c\uac00\uc694?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-914e94aa\">\uba3c\uc9c0\uc640 \uc774\ubb3c\uc9c8\uc740 \uc0bd\uc785 \uc190\uc2e4\uc744 \uc99d\uac00\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b2ddfc01\">\ucee4\ub125\ud130 \ub2e8\uba74\uc744 \ub9cc\uc9c0\uc9c0 \ub9c8\uc2ed\uc2dc\uc624. \uccad\uc18c\uac00 \ud544\uc694\ud55c \uacbd\uc6b0, \uc77c\ubc18 \ud2f0\uc288, \uc637\uac10 \ub610\ub294 \uccad\uacb0 \uc0c1\ud0dc\uac00 \ubd88\ubd84\uba85\ud55c \uc555\ucd95 \uacf5\uae30\ub97c \uc0ac\uc6a9\ud558\uc9c0 \ub9d0\uace0, \uc801\uc808\ud55c \uad11\uc12c\uc720 \uccad\uc18c \ub3c4\uad6c\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-9cb96f57\">6. \ucf00\uc774\ube14\uc774 \uc2ec\ud558\uac8c \uad6c\ubd80\ub7ec\uc838 \uc788\uac70\ub098 \uc190\uc0c1\ub418\uc5c8\uc2b5\ub2c8\uae4c?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-18815156\">\ucf00\uc774\ube14\uc774 \ub2e4\uc74c\uacfc \uac19\uc740\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uac00\uad6c \ubc11\uc5d0 \uac07\ud78c;<\/li>\n\n\n\n<li>\uac00\ud30c\ub978 \ubaa8\ud241\uc774\ub97c \uaebe\uc73c\uba70;<\/li>\n\n\n\n<li>\ub108\ubb34 \uaf49 \uc870\uc5ec\uc838 \uc788\ub2e4;<\/li>\n\n\n\n<li>\ucf00\uc774\ube14 \ud0c0\uc774\ub85c \uc870\uc5ec\uc9c4;<\/li>\n\n\n\n<li>\ucee4\ub125\ud130 \uadfc\ucc98\uac00 \uc190\uc0c1\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fb336892\">\uc12c\uc720\ub97c \ubd80\ub4dc\ub7fd\uace0 \uc790\uc5f0\uc2a4\ub7ec\uc6b4 \uace1\uc120\uc744 \uadf8\ub9ac\ub3c4\ub85d \uc720\uc9c0\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-64242f3b\">7. \uc218\uc2e0\ub41c \uad11 \ucd9c\ub825\uc774 \ud5c8\uc6a9 \ubc94\uc704 \ub0b4\uc5d0 \uc788\uc2b5\ub2c8\uae4c?<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2cd1ae69\">\uc7a5\uce58\uac00 DDM \ub610\ub294 DOM\uc744 \uc9c0\uc6d0\ud558\ub294 \uacbd\uc6b0, \ubcf4\uace0\ub41c \uc1a1\uc2e0(Tx) \ubc0f \uc218\uc2e0(Rx) \uad11 \ucd9c\ub825\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-03ece1c8\">\uc218\uc2e0\ub41c \uad11 \ucd9c\ub825\uc744 \ud2b8\ub79c\uc2dc\ubc84\uc5d0 \uba85\uc2dc\ub41c \uc218\uc2e0\uae30 \uc791\ub3d9 \ubc94\uc704\uc640 \ube44\uad50\ud558\uc2ed\uc2dc\uc624. \uad11 \ucd9c\ub825\uc774 \ub108\ubb34 \ub0ae\uc73c\uba74 \ub9c1\ud06c\uac00 \ud615\uc131\ub418\uc9c0 \uc54a\uc744 \uc218 \uc788\uc73c\uba70, \uad11 \ucd9c\ub825\uc774 \uacfc\ub3c4\ud558\uba74 \uc77c\ubd80 \uc9e7\uc740 \ub2e8\uc77c \ubaa8\ub4dc \uc5f0\uacb0\uc5d0\uc11c \uc218\uc2e0\uae30\uc5d0 \uacfc\ubd80\ud558\uac00 \uac78\ub9b4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-06cf70e9\">\uadf8\ub9ac\uace0 <a href=\"https:\/\/www.thefoa.org\/tech\/ref\/testing\/test\/network-troubleshooting.html\" target=\"_blank\" rel=\"noopener\">FOA \uad11\uc12c\uc720 \ub124\ud2b8\uc6cc\ud06c \ubb38\uc81c \ud574\uacb0 \uac00\uc774\ub4dc<\/a> \uad11 \ub124\ud2b8\uc6cc\ud06c \ubb38\uc81c\ub97c \uc9c4\ub2e8\ud560 \ub54c\ub294 \uc218\uc2e0\uae30 \ucd9c\ub825, \uc1a1\uc2e0\uae30 \ucd9c\ub825, \ud2b8\ub79c\uc2dc\ubc84 \ubc0f \ub9c1\ud06c \uc190\uc2e4\uc744 \ud655\uc778\ud560 \uac83\uc744 \uad8c\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4bfca49c\">DDM \uc815\ubcf4\ub97c \ud655\uc778\ud560 \uc218 \uc5c6\ub294 \uacbd\uc6b0, \uad11 \ud30c\uc6cc \ubbf8\ud130\uc640 \uc62c\ubc14\ub978 \uc2dc\ud5d8 \uc808\ucc28\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624. \ud574\ub2f9 <a href=\"https:\/\/www.thefoa.org\/tech\/ref\/basic\/test.html\" target=\"_blank\" rel=\"noopener\">FOA \uad11\uc12c\uc720 \ud14c\uc2a4\ud2b8 \uac00\uc774\ub4dc<\/a> \uc1a1\uc2e0 \uc804\ub825, \uc218\uc2e0 \uc804\ub825 \ubc0f \ub9c1\ud06c \uc190\uc2e4 \uac04\uc758 \uae30\ubcf8\uc801\uc778 \uad00\uacc4\ub97c \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-08f9d237\">\uac04\ub2e8\ud55c \uc608\uc2dc<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b6a63954\">\ub450 \uac1c\uc758 \uc2a4\uc704\uce58\uac00 \ub4c0\ud50c\ub809\uc2a4 LC SFP+ \ud2b8\ub79c\uc2dc\ubc84\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc5f0\uacb0\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3dc606da\">\ub450 \uc2a4\uc704\uce58 \ubaa8\ub450 \ud2b8\ub79c\uc2dc\ubc84\ub97c \uac10\uc9c0\ud558\uc9c0\ub9cc, \ub9c1\ud06c \ud45c\uc2dc\ub4f1\uc740 \uaebc\uc9c4 \uc0c1\ud0dc\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6a2fbfff\">\ud604\uc7ac \ucf00\uc774\ube14 \uacbd\ub85c\ub294 \ub2e4\uc74c\uc744 \uc5f0\uacb0\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc2a4\uc704\uce58 A \uc1a1\uc2e0 \u2192 \uc2a4\uc704\uce58 B \uc1a1\uc2e0<\/li>\n\n\n\n<li>\uc2a4\uc704\uce58 A \uc218\uc2e0 \u2190 \uc2a4\uc704\uce58 B \uc218\uc2e0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d4f831d2\">\ub450 \uc218\uc2e0\uae30 \ubaa8\ub450 \uc0c1\ub300\ud3b8 \uc1a1\uc2e0\uae30\uc5d0 \uc5f0\uacb0\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0f33d61a\">\uc2a4\uc704\uce58 B\uc5d0\uc11c\ub9cc \ub450 \uac00\ub2e5\uc758 \uc21c\uc11c\ub97c \ubc14\uafbc \ud6c4, \uacbd\ub85c\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ub429\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uc2a4\uc704\uce58 A \uc1a1\uc2e0 \u2192 \uc2a4\uc704\uce58 B \uc218\uc2e0<\/li>\n\n\n\n<li>\uc2a4\uc704\uce58 A \uc218\uc2e0 \u2190 \uc2a4\uc704\uce58 B \uc1a1\uc2e0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fcd8b1b3\">\ud2b8\ub79c\uc2dc\ubc84, \uc18d\ub3c4, \ud30c\uc7a5, \uad11\uc12c\uc720 \uc720\ud615 \ubc0f \uad11 \ucd9c\ub825\uc774 \ud638\ud658\ub41c\ub2e4\uba74 \uc774\uc81c \ub9c1\ud06c\uac00 \uc124\uc815\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-2dce2700\">\ucd5c\uc885 \ud655\uc778 \ubaa9\ub85d<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-7ac2123c\">\uc0c8\ub85c\uc6b4 \uc774\uc911 \uad11\uc12c\uc720 \ud68c\uc120\uc774 \uacc4\uc18d \uc5f0\uacb0\ub418\uc9c0 \uc54a\uc744 \ub54c:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\uc774 \ub9c1\ud06c\uac00 2\uac00\ub2e5 \ub4c0\ud50c\ub809\uc2a4 \ub9c1\ud06c\uc778\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\uc6d0\ub798 \uc5f0\uacb0 \uc0c1\ud0dc\ub97c \uc0ac\uc9c4\uc73c\ub85c \ucc0d\uc5b4 \uc8fc\uc138\uc694.<\/li>\n\n\n\n<li>\uad11 \ud3ec\ud2b8\ub97c \uc808\ub300 \ub4e4\uc5ec\ub2e4\ubcf4\uc9c0 \ub9c8\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ud55c\ucabd \ub05d\uc5d0\uc11c\ub9cc \ub450 \uac00\ub2e5\uc744 \uc11c\ub85c \ubc14\uafd4\uc8fc\uc138\uc694.<\/li>\n\n\n\n<li>\ub9c1\ud06c\uac00 \uc81c\ub300\ub85c \uc5f4\ub9ac\ub294\uc9c0 \ud655\uc778\ud574 \ubcf4\uc138\uc694.<\/li>\n\n\n\n<li>\uc5f0\uacb0\uc774 \ub04a\uae34 \uc0c1\ud0dc\uac00 \uc9c0\uc18d\ub418\uba74 \uc6d0\ub798\uc758 \uc5f0\uacb0\uc744 \ubcf5\uc6d0\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ud3ec\ud2b8 \uc0c1\ud0dc, \ubaa8\ub4c8 \uc804\uc1a1 \uc18d\ub3c4, \ud30c\uc7a5 \ubc0f \uad11\uc12c\uc720 \uc720\ud615\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ucee4\ub125\ud130\ub97c \uae68\ub057\uc774 \ub2e6\uc740 \ud6c4 \uc62c\ubc14\ub974\uac8c \ub2e4\uc2dc \uc7a5\ucc29\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\ucf00\uc774\ube14\uc5d0 \uae09\uaca9\ud55c \uad7d\ud798\uc774\ub098 \uc190\uc0c1 \ud754\uc801\uc774 \uc788\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n\n\n\n<li>\uc218\uc2e0\ub41c \uad11 \ucd9c\ub825\uc744 \uce21\uc815\ud558\uac70\ub098 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-06241b08\">\uc0c8\ub85c\uc6b4 \ud2b8\ub79c\uc2dc\ubc84\ub098 \ud328\uce58 \ucf00\uc774\ube14\uc744 \uc120\ud0dd\ud558\uae30 \uc804\uc5d0 \ub2e4\uc74c \ub0b4\uc6a9\uc744 \uc77d\uc5b4\ubcf4\uc2ed\uc2dc\uc624. <a href=\"https:\/\/www.luleey.com\/ko\/lc-vs-sc-vs-mpo-how-to-choose-the-right-fiber-connector-for-1g-to-100g-networks\/\">LC, SC, MPO \ucee4\ub125\ud130 \ube44\uad50 \uac00\uc774\ub4dc<\/a> \ub610\ub294 LuLeey\uc758 \uc0c1\ud488\uc744 \ub458\ub7ec\ubcf4\uc138\uc694 <a href=\"https:\/\/www.luleey.com\/ko\/product-category\/optical_module_transceivers\/\">\uad11 \ubaa8\ub4c8 \ud2b8\ub79c\uc2dc\ubc84<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>\ud14c\uc2a4\ud2b8 \uacb0\uacfc \uc758\ubbf8 \ub9c1\ud06c\uac00 \uc5f0\uacb0\ub428 \uc6d0\ub798\uc758 \uc1a1\uc2e0\/\uc218\uc2e0 \uadf9\uc131\uc774 \ubc18\uc804\ub418\uc5b4 \uc788\uc5c8\uc74c \ub9c1\ud06c\uac00 \uc5f0\uacb0\ub418\uc9c0 \uc54a\uc740 \uc0c1\ud0dc \uc720\uc9c0 \uadf9\uc131\uc774 \uc62c\ubc14\ub974\uc9c0 \uc54a\uc744 \uc218 \uc788\uc74c<\/p>","protected":false},"author":1,"featured_media":21831,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1077],"tags":[1416,1417,1419,1420,1418],"class_list":["post-21825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-problem-cases","tag-tx-rx","tag-duplex-lc","tag-fiber-link-down","tag-fiber-polarity","tag-sfp-troubleshooting"],"_links":{"self":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts\/21825","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=21825"}],"version-history":[{"count":0,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/posts\/21825\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/media\/21831"}],"wp:attachment":[{"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/media?parent=21825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/categories?post=21825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.luleey.com\/ko\/wp-json\/wp\/v2\/tags?post=21825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}