{"id":3578,"date":"2025-11-28T00:00:00","date_gmt":"2025-11-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-physical-medium-dependent-pmd\/"},"modified":"2026-06-22T04:35:06","modified_gmt":"2026-06-22T04:35:06","slug":"what-is-physical-medium-dependent-pmd","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/what-is-physical-medium-dependent-pmd","title":{"rendered":"\uad11 \ub9c1\ud06c\ub97c \uc704\ud55c PMD(Physical Medium Dependent) \uc2e4\ubb34 \uc548\ub0b4\uc11c"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe.webp\" alt=\"PMD (Physical Medium Dependent)\" class=\"wp-image-3574\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0cd5f86bb90c45a09b502f640fbf4abe-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"highlight\">The<\/span> <strong>\ubb3c\ub9ac\uc801 \ub9e4\uccb4 \uc885\uc18d(PMD) \uacc4\uce35<\/strong> \uacc4\uce35\uc740 \uc774\ub354\ub137 \ubb3c\ub9ac \uacc4\uce35\uc5d0\uc11c \uac00\uc7a5 \uc911\uc694\ud55c \uc694\uc18c \uc911 \ud558\ub098\uc774\uc9c0\ub9cc, \uc790\uc8fc \uc624\ud574\ub418\uace4 \ud569\ub2c8\ub2e4. PMD\ub294 \ub2e8\uc77c \ubaa8\ub4dc \uad11\uc12c\uc720, \ub2e4\uc911 \ubaa8\ub4dc \uad11\uc12c\uc720, \uc9c1\uc811 \uc5f0\uacb0 \uad6c\ub9ac \ucf00\uc774\ube14 \ub610\ub294 \uc804\uae30 \ubc31\ud50c\ub808\uc778\uacfc \uac19\uc740 \ud2b9\uc815 \ub9e4\uccb4\ub97c \ud1b5\ud574 \ube44\ud2b8\ub97c \ubb3c\ub9ac\uc801\uc73c\ub85c \uc1a1\uc2e0\ud558\uace0 \uc218\uc2e0\ud558\ub294 \ubc29\uc2dd\uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub124\ud2b8\uc6cc\ud06c \uc124\uacc4\uc790, \ud14c\uc2a4\ud2b8 \uc5d4\uc9c0\ub2c8\uc5b4 \ubc0f \uc870\ub2ec \ud300\uc5d0\uac8c \uc788\uc5b4 PMD\ub97c \uc774\ud574\ud558\ub294 \uac83\uc740 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. \uc65c\ub0d0\ud558\uba74 PMD \uc0ac\uc591\uc774 \ubc14\ub85c <strong>How to reduce link flapping, packet loss, and CRC\/FCS errors<\/strong>, <strong>\uc804\ub2ec \uac70\ub9ac<\/strong>, <strong>\uc2e0\ud638 \ubb34\uacb0\uc131<\/strong>, \uc640 <strong>\ud2b8\ub79c\uc2a4\uc2dc\ubc84 \uc120\ud0dd\uc5d0 \uc9c1\uc811\uc801\uc778 \uc601\ud5a5\uc744 \uc8fc\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ubcf8 \uac00\uc774\ub4dc\ub294 \ud45c\uc900\uc5d0 \ubd80\ud569\ud558\ub294 \uc804\ubb38\uc801\uc778 PMD \uc124\uba85\uc744 \uc81c\uacf5\ud558\uba70, SFP, SFP+, QSFP \ubaa8\ub4c8 \ub4f1 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">\uad11 \ud2b8\ub79c\uc2a4\uc2dc\ubc84<\/a> \uc120\ud0dd \uc2dc \ud3c9\uac00\ud574\uc57c \ud560 \ud30c\ub77c\ubbf8\ud130\ub97c \ud3ec\ud568\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \ubb3c\ub9ac\uc801 \ub9e4\uccb4 \uc885\uc18d(PMD) \uacc4\uce35\uc774\ub780 \ubb34\uc5c7\uc778\uac00?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"highlight\">The<\/span> <strong>\ubb3c\ub9ac\uc801 \ub9e4\uccb4 \uc885\uc18d(PMD) \uacc4\uce35<\/strong> \uacc4\uce35\uc740 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">IEEE 802.3<\/a> PHY\uc758 \ucd5c\ud558\uc704 \uae30\ub2a5 \ube14\ub85d\uc785\ub2c8\ub2e4. \uc774 \uacc4\uce35\uc740 \uc120\ud0dd\ub41c \ub9e4\uccb4\ub97c \ud1b5\ud55c \uc131\uacf5\uc801\uc778 \uc804\uc1a1\uc744 \uc704\ud574 \ud544\uc694\ud55c <strong>\uad11\ud559\uc801 \ub610\ub294 \uc804\uae30\uc801 \ud2b9\uc131<\/strong> \uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2e4\uc81c \uc81c\ud488\uc5d0\uc11c PMD\ub294 \uad11\ud559 \ud2b8\ub79c\uc2a4\uc2dc\ubc84\uc758 \ud504\ub860\ud2b8\uc5d4\ub4dc \uc778\ud130\ud398\uc774\uc2a4\u2014\uc989, \ub808\uc774\uc800, \uc218\uc2e0 \uad11\ub2e4\uc774\uc624\ub4dc, \ubcc0\uc870 \ud68c\ub85c \ubc0f \uad00\ub828 \uad6c\uc131\uc694\uc18c\u2014\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >PMD\uac00 \uc81c\uc5b4\ud558\ub294 \ud56d\ubaa9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\uad11\ud559 \ud30c\uc7a5 \ubc0f \uc2a4\ud399\ud2b8\ub7fc \ud3ed<\/p><\/li><li><p>\uc1a1\uc2e0(Tx) \ud3c9\uade0 \ucd9c\ub825 \uc804\ub825 \ubc0f \ubc1c\uc0ac \uc870\uac74<\/p><\/li><li><p>\uc218\uc2e0(Rx) \uac10\ub3c4 \ubc0f \uacfc\ubd80\ud558 \ud55c\uacc4<\/p><\/li><li><p>\uad11\ud559 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/optical-transceiver-return-loss-back-reflection-guide\/\">(\uadc0\ud658 \uc190\uc2e4, return loss)<\/a> \ubc0f \uc18c\uba78\ube44(Extinction Ratio)<\/p><\/li><li><p>\uc9c0\uc6d0\ub418\ub294 \uad11\uc12c\uc720 \uc720\ud615 \ubc0f \ub9c1\ud06c \uac70\ub9ac<\/p><\/li><li><p>\uc804\uae30 PHY\uc758 \uacbd\uc6b0 \uc804\uae30\uc801 \uc1a1\uc2e0\/\uc218\uc2e0 \uc544\uc774 \ub9c8\uc2a4\ud06c(Eye Mask)<\/p><\/li><li><p>\uc900\uc218 \uce21\uc815\uc744 \uc704\ud55c \ud14c\uc2a4\ud2b8 \ud3ec\uc778\ud2b8 \uc815\uc758<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">PMD\ub294 <strong>\ud45c\uc900\ud654\ub41c PHY \ub85c\uc9c1\uacfc \ubb3c\ub9ac\uc801 \uc138\uacc4 \uc0ac\uc774\uc758<\/strong>, \ub2e4\ub9ac \uc5ed\ud560\uc744 \ud558\uc5ec, \uc5ec\ub7ec \ubca4\ub354\uc758 \ud2b8\ub79c\uc2a4\uc2dc\ubc84\uac00 \ub3d9\uc77c\ud55c \uad11\uc12c\uc720 \uc778\ud504\ub77c\uc5d0\uc11c \uc0c1\ud638 \uc6b4\uc6a9\ub420 \uc218 \uc788\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f PMD\uc640 \uae30\ud0c0 PHY \ud558\uc704 \uacc4\uce35 \ube44\uad50<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774\ub354\ub137 PHY \uc544\ud0a4\ud14d\ucc98\uc5d0\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/pcs-physical-coding-sublayer-ethernet-explained\/\"><strong>PCS(\ubb3c\ub9ac \ucf54\ub529 \ud558\uc704 \uacc4\uce35)<\/strong> <\/a>\u2014 \uc778\ucf54\ub529(\uc608: 64b\/66b), <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/fec-forward-error-correction-in-optical-communication\/\">FEC<\/a>, \u2014 \ub808\uc778 \ubd84\ubc30(Lane Distribution)<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/pma-physical-medium-attachment-ethernet-explained\/\"><strong>PMA(\ubb3c\ub9ac \ub9e4\uccb4 \ubd80\ucc29)<\/strong><\/a> \u2014 \uc9c1\ub82c\ud654\/\ubcd1\ub82c\ud654(SerDes), \ud074\ub85d \ubcf5\uad6c(Clock Recovery)<\/p><\/li><li><p><strong>PMD(\ubb3c\ub9ac \ub9e4\uccb4 \uc885\uc18d)<\/strong> \u2014 \ub9e4\uccb4\ubcc4 \uad11\ud559\/\uc804\uae30 \ud30c\ub77c\ubbf8\ud130<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">PMD\ub294 \uad11\ud559 \uc608\uc0b0 \ubc0f \ub9e4\uccb4 \uc720\ud615\uacfc \uc9c1\uc811 \uc5f0\uad00\ub41c \ubd80\ubd84\uc785\ub2c8\ub2e4.<br\/>\ud558\ub098\uc758 MAC\uc740 \uc11c\ub85c \ub2e4\ub978 \uc804\uc1a1 \uac70\ub9ac\ub098 \ub9e4\uccb4\uc5d0 \ucd5c\uc801\ud654\ub41c \uc5ec\ub7ec PMD(\uc608: SR, LR, ER)\ub97c \uc9c0\uc6d0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \uc2e4\uc81c \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c PMD\uac00 \uc911\uc694\ud55c \uc774\uc720<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34.webp\" alt=\"Why PMD Matters in Real Networks\" class=\"wp-image-3575\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27e048578ea044bf9f40c798076a3c34-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\ubcf4\uc7a5\ub41c \uc0c1\ud638 \uc6b4\uc6a9\uc131<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ub3d9\uc77c\ud55c PMD \uc0ac\uc591\uc744 \uc900\uc218\ud558\ub294 \ubaa8\ub4c8\ub9cc\uc774 \uc2e0\ub8b0\uc131 \uc788\uac8c \uc5f0\uacb0\ub429\ub2c8\ub2e4. \ud30c\uc7a5, \ucd9c\ub825 \uc804\ub825 \uc218\uc900 \ubc0f \uac10\ub3c4\ub294 IEEE \uc694\uad6c\uc0ac\ud56d\uacfc \uc77c\uce58\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc608\uce21 \uac00\ub2a5\ud55c \ub9c1\ud06c \ub3c4\ub2ec \uac70\ub9ac<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMD \ub9e4\uac1c\ubcc0\uc218\ub294 \ub9c1\ud06c \uc190\uc2e4 \uc608\uc0b0\uc744 \uc815\uc758\ud569\ub2c8\ub2e4. \ubaa8\ub4c8\uc758 \uc1a1\uc2e0\uae30(Tx) \ucd9c\ub825 \uc804\ub825\uc774 \u20133 dBm\uc5d0\uc11c +3 dBm\uc774\uace0 \uc218\uc2e0\uae30(Rx) \uac10\ub3c4\uac00 \u201314 dBm\uc774\ub77c\uba74, \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uad11\ud559 \uc608\uc0b0\uc740 \uc774\ub7ec\ud55c \uac12\ub4e4\ub85c\ubd80\ud130 \uc0b0\ucd9c\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc815\ud655\ud55c \ud14c\uc2a4\ud2b8 \ubc0f \uaddc\uaca9 \uc900\uc218<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMD\ub294 \ud45c\uc900\ud654\ub41c \ud14c\uc2a4\ud2b8 \ud3ec\uc778\ud2b8(\uc608: TP2, TP3)\ub97c \uc815\uc758\ud558\uc5ec \uad11 \ucd9c\ub825, \uc9c0\ud130(jitter), \uc544\uc774 \ub2e4\uc774\uc5b4\uadf8\ub7a8(eye diagram)\uc744 \uc77c\uad00\ub418\uac8c \uce21\uc815\ud560 \uc218 \uc788\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc2dc\uac04 \uacbd\uacfc\uc5d0 \ub530\ub978 \uc2e0\ub8b0\uc131<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uac15\ud654\ub41c PMD \uc5ec\uc720 \ub9c8\uc9c4\uc744 \uac16\ucd98 \ubaa8\ub4c8\uc740 \ub178\ud654, \uc628\ub3c4 \ubcc0\ud654, \uad11\uc12c\uc720 \uc624\uc5fc, \ucee4\ub125\ud130 \ubc18\uc0ac \ub4f1\uc5d0 \ub300\ud574 \ucd5c\uc18c \uc694\uad6c\uc0ac\ud56d\ub9cc \ucda9\uc871\ud558\ub294 \ubaa8\ub4c8\ubcf4\ub2e4 \ub354 \ub192\uc740 \ub0b4\uc131\uc744 \uac00\uc9d1\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \ud3c9\uac00\ud574\uc57c \ud560 \ud575\uc2ec PMD \ub9e4\uac1c\ubcc0\uc218<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uac01 PMD \uc0ac\uc591\uc5d0\ub294 \uc5ec\ub7ec \uac00\uc9c0 \uc911\uc694\ud55c \uad11\ud559 \ubc0f \uc804\uae30\uc801 \uce21\uc815 \ud56d\ubaa9\uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub4e4\uc744 \uc774\ud574\ud558\uba74 \uc801\uc808\ud55c \ubaa8\ub4c8 \uc120\ud0dd\uc774 \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud30c\uc7a5(\u03bb) \ubc0f \uc2a4\ud399\ud2b8\ub7fc \ud3ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uc77c\ubc18\uc801\uc778 \uac12\uc5d0\ub294 \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/850nm-optical-transceivers-for-short-reach-mmf-transmission\/\"><strong>850nm<\/strong><\/a> \u2014 \ub2e8\uac70\ub9ac \uba40\ud2f0\ubaa8\ub4dc(SR)<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/1310nm-optical-module-applications-performance-comparison\/\"><strong>1310nm<\/strong><\/a> \u2014 \uc2f1\uae00\ubaa8\ub4dc \uc911\uac70\ub9ac(LR)<\/p><\/li><li><p>LX, BX, CWDM, DWDM \ubcc0\ud615\uc5d0 \ub300\ud55c \ud2b9\uc815 \ubc94\uc704<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc2a4\ud399\ud2b8\ub7fc \ud3ed\uc740 \ud2b9\ud788 \uc7a5\uac70\ub9ac \ub9c1\ud06c\uc5d0\uc11c \ubd84\uc0b0 \uc131\ub2a5\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc1a1\uc2e0\uae30(Tx) \ud3c9\uade0 \ucd9c\ub825 \uc804\ub825<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ucd5c\uc18c \ubc0f \ucd5c\ub300 \ucd9c\ub825 \uc804\ub825\uc744 \uba85\uc2dc\ud569\ub2c8\ub2e4.<br\/>\ub108\ubb34 \ub0ae\uc74c \u2192 \ub9c1\ud06c\uac00 \uc218\uc2e0\uae30\uc5d0 \ub3c4\ub2ec\ud558\uc9c0 \ubabb\ud560 \uc218 \uc788\uc74c.<br\/>\ub108\ubb34 \ub192\uc74c \u2192 \uc218\uc2e0\uae30\ub97c \uacfc\ubd80\ud558 \uc2dc\ud0a4\uac70\ub098 \ube44\uc120\ud615 \ud6a8\uacfc\ub97c \uc720\ubc1c\ud560 \uc218 \uc788\uc74c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc218\uc2e0\uae30 \uac10\ub3c4 \ubc0f \uacfc\ubd80\ud558 \ud55c\uacc4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\uac10\ub3c4:<\/strong> \uc218\uc2e0\uae30\uac00 \ube44\ud2b8 \uc624\ub958\uc728(BER) \uc694\uad6c\uc0ac\ud56d\uc744 \ucda9\uc871\ud558\ub294 \ucd5c\uc800 \uc804\ub825 \uc218\uc900<\/p><\/li><li><p><strong>\uacfc\ubd80\ud558 \ud55c\uacc4:<\/strong> \uc2e0\ud638 \uc65c\uace1\uc774 \ubc1c\uc0dd\ud558\uae30 \uc804\uae4c\uc9c0 \ud5c8\uc6a9\ub418\ub294 \ucd5c\ub300 \uc785\ub825 \uc804\ub825<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774 \ub450 \uac12\uc740 \uc0ac\uc6a9 \uac00\ub2a5\ud55c <strong>\uad11\ud559 \ud30c\uc6cc \uc608\uc0b0<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc18c\uba78\ube44(Extinction Ratio) \ubc0f \ubc18\uc0ac\uc190(Return Loss)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/glossary\/extinction-ratio-importance-signal-quality-data-reliability\/\"><strong>\uc18c\uba78\ube44<\/strong><\/a> \ub17c\ub9ac\uc801 \u201c1\u201d\uacfc \u201c0\u201d \uc0ac\uc774\uc758 \uba85\ud655\ud55c \uad6c\ubd84\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.\u201d<\/p><\/li><li><p><strong>\uad11 \ubc18\uc0ac\uc190<\/strong> \ubc18\uc0ac\uc5d0 \ub300\ud55c \ub0b4\uc131\uc744 \uacb0\uc815\ud558\uba70, \uae34 \uc2f1\uae00\ubaa8\ub4dc \uad6c\uac04\uc5d0\uc11c \ud2b9\ud788 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\uc9c0\uc6d0\ub418\ub294 \uad11\uc12c\uc720 \uc720\ud615 \ubc0f \ub9c1\ud06c \uac70\ub9ac<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PMD \ud45c\uc5d0\uc11c\ub294 \ub2e4\uc74c\uc744 \uba85\uc2dc\ud569\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>OM2\/OM3\/OM4 \uba40\ud2f0\ubaa8\ub4dc \uad11\uc12c\uc720\uc5d0 \ub300\ud55c \ub9c1\ud06c \uac70\ub9ac<\/p><\/li><li><p>G.652\/G.655 \uc2f1\uae00\ubaa8\ub4dc \uad11\uc12c\uc720\uc5d0 \ub300\ud55c \ub9c1\ud06c \uac70\ub9ac<\/p><\/li><li><p>IEEE \uc804\ub825 \uc608\uc0b0 \ud558\uc5d0\uc11c \uc9c0\uc6d0 \uac00\ub2a5\ud55c \ucd5c\ub300 \uae38\uc774<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \uad11 \ud2b8\ub79c\uc2a4\uc2dc\ubc84 \uc120\ud0dd \uc2dc\uc758 PMD \uc801\uc6a9<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uad11 \ubaa8\ub4c8\uc744 \uc120\ud0dd\ud560 \ub54c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/what-is-a-data-center\/\">\ub370\uc774\ud130 \uc13c\ud130<\/a>, \uc0b0\uc5c5\uc6a9 \ub124\ud2b8\uc6cc\ud06c \ub610\ub294 \ud1b5\uc2e0 \uc778\ud504\ub77c\uc5d0\uc11c PMD \uc900\uc218\ub97c \ud655\uc778\ud558\uba74 \ub2e4\uc74c\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\uc2e4\uc81c IEEE \uc0c1\ud638\uc6b4\uc6a9\uc131<\/p><\/li><li><p>\uae30\uc874 \uad11\uc12c\uc720\uc5d0 \ub300\ud55c \uc815\ud655\ud55c \uc804\uc1a1 \uac70\ub9ac<\/p><\/li><li><p>\uc608\uce21 \uac00\ub2a5\ud55c \uc190\uc2e4 \uc5ec\uc720<\/p><\/li><li><p>\uc628\ub3c4 \uc2a4\ud2b8\ub808\uc2a4 \ub610\ub294 \uc7a1\uc74c\uc774 \ub9ce\uc740 \ud658\uacbd\uc5d0\uc11c\ub3c4 \uac15\ub825\ud55c \uc131\ub2a5<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc608\ub97c \ub4e4\uc5b4, \ub2e4\uc74c \uc911 \uc120\ud0dd\ud558\ub294 \uac83\uc740 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\"><strong>10GBASE-SR<\/strong><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\"><strong>10GBASE-LR<\/strong><\/a>, \uc640 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476054.htm\"><strong>\uc2f1\uae00\ubaa8\ub4dc \uad11\uc12c\uc720\ub294 \ud655\uc7a5\ub41c \uc804\ub2ec \uac70\ub9ac\uc640 \uc548\uc815\uc801\uc778 \uc2e0\ud638 \uc804\uc1a1\uc774 \uc694\uad6c\ub418\ub294 \ud1b5\uc2e0\ub9dd, \uba54\ud2b8\ub85c \ub124\ud2b8\uc6cc\ud06c \ubc0f \uc7a5\uac70\ub9ac \uae30\uc5c5 \ubc31\ubcf8 \uc5f0\uacb0\uc5d0 \uc77c\ubc18\uc801\uc73c\ub85c \uc801\uc6a9\ub429\ub2c8\ub2e4.<\/strong><\/a> \uac01\uac01 300m, 10km, 40km\uc5d0 \ucd5c\uc801\ud654\ub41c \uc11c\ub85c \ub2e4\ub978 PMD\ub97c \uc120\ud0dd\ud558\ub294 \uac83\uacfc \ubcf8\uc9c8\uc801\uc73c\ub85c \ub3d9\uc77c\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b.webp\" alt=\"10GBASE-SR, 10GBASE-LR, and 10GBASE-E\" class=\"wp-image-3576\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/31aebd7127984c4e95dcb31cf479990b-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \uc608\uc2dc PMD \uc694\uc57d \ud45c <\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\uac12\uc740 \uc120\ud0dd\ub41c <\/em><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/file\/datasheet\/ls-sm3110-10c.pdf\"><em>SFP+ \ubaa8\ub4c8 \ub370\uc774\ud130\uc2dc\ud2b8\uc758 \uc815\ud655\ud55c \ud30c\ub77c\ubbf8\ud130\ub85c \ub300\uccb4\ud558\uc138\uc694.<\/em><\/a><em>.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 220px;\"\/><col style=\"width: 214px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>PMD \ud2b9\uc131<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>\uc77c\ubc18\uc801\uc778 \uac12<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\uc124\uba85<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\ud30c\uc7a5<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>1310nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\ub2e8\uc77c \ubaa8\ub4dc \uc7a5\uac70\ub9ac \ub808\uc774\uc800<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\uc1a1\uc2e0 \ucd9c\ub825(\ucd5c\uc18c\/\ucd5c\ub300)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>\u20133dBm \/ +3dBm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\uc1a1\uc2e0 \ucd9c\ub825 \ubc94\uc704<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\uc218\uc2e0 \uac10\ub3c4<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>\u201314dBm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>BER \uc900\uc218\ub97c \uc704\ud55c \ucd5c\uc18c \uc804\ub825<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\uc218\uc2e0 \uacfc\ubd80\ud558<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>+1dBm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\ucd5c\ub300 \uc548\uc804 \uc785\ub825<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\uc804\uc1a1 \uac70\ub9ac<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>10km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\uad11\uc12c\uc720 \uc190\uc2e4 \ubc0f \uc2a4\ud50c\ub77c\uc774\uc2a4\uc5d0 \ub530\ub77c \ub2e4\ub984<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"220\"><p>\uc18c\uba78\ube44(Extinction Ratio)<\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"214\"><p>\u2265 3.5dB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\ub808\uc774\uc800 \ubcc0\uc870 \ud488\uc9c8<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f PMD \ud14c\uc2a4\ud2b8 \ubc0f \uc900\uc218 \uac80\uc99d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\uba85\ud655\ud788 \uc815\uc758\ub41c PMD \ud14c\uc2a4\ud2b8\ub294 \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 \uc0c1\ud638\uc6b4\uc6a9\uc131\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<br\/>\uc8fc\uc694 \uce21\uc815 \ud56d\ubaa9\uc5d0\ub294 \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\uc1a1\uc2e0\uae30 \ubc0f \uc218\uc2e0\uae30\uc758 \uad11 \ucd9c\ub825<\/p><\/li><li><p>\uc544\uc774 \ub9c8\uc2a4\ud06c \uc900\uc218 \uc5ec\ubd80<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ko\/knowledge-center\/jitter-in-optics-causes-effects-measurement-reduction\/\">\uc9c0\ud130(Jitter)<\/a> \ubc0f \uc7a1\uc74c \uc5ec\uc720<\/p><\/li><li><p>\uc815\uc758\ub41c \uc628\ub3c4 \uc870\uac74\uc5d0\uc11c\uc758 \ud14c\uc2a4\ud2b8<\/p><\/li><li><p>\uc2a4\ud2b8\ub808\uc2a4 \uc870\uac74 \ud558\uc5d0\uc11c \uc218\uc2e0 \uac10\ub3c4 \uac80\uc99d<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\uc774\ub7ec\ud55c \uce21\uc815\uc740 IEEE \uc900\uc218 \uc808\ucc28\uc640 \uc77c\uce58\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f PMD \uad00\ub828 \uc7a5\uc560 \uc9c4\ub2e8<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\ub0ae\uc740 \uc218\uc2e0 \uc804\ub825<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\ucee4\ub125\ud130\uc758 \uccad\uacb0\ub3c4, \uc608\uae30\uce58 \uc54a\uc740 \uad11\uc12c\uc720 \uc190\uc2e4 \ub610\ub294 \uacfc\ub3c4\ud55c \ud328\uce58\ub9c1\uc744 \uc810\uac80\ud558\uc138\uc694.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\uae34 \uad6c\uac04\uc5d0\uc11c \ub9c1\ud06c \ud50c\ub798\ud551 \ubc1c\uc0dd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\uc1a1\uc2e0 \uc804\ub825\uc758 \ub178\ud654 \ub610\ub294 \ud55c\uacc4 \ubbfc\uac10\ub3c4\ub97c \uc810\uac80\ud558\uc138\uc694\u2014\uad11\ud559 \uc608\uc0b0\uc774 \ub108\ubb34 \ube61\ube61\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\ub2e4\uc911\ubaa8\ub4dc\uac00 \uc608\uc0c1\ubcf4\ub2e4 \uc9e7\uc740 \uac70\ub9ac\uae4c\uc9c0 \ub3c4\ub2ec\ud568<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">OM3\/OM4 \ud638\ud658\uc131\uc744 \ud655\uc778\ud558\uc138\uc694. \ub300\uc5ed\ud3ed \uc81c\ud55c\uc740 \ub9e4\uccb4\ubcc4\ub85c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a1\ufe0f \uacb0\ub860<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"highlight\">The<\/span> <strong>\ubb3c\ub9ac\uc801 \ub9e4\uccb4 \uc885\uc18d(PMD) \uacc4\uce35<\/strong> \uc11c\ube0c\ub808\uc774\uc5b4\ub294 \uc774\ub354\ub137 \ubb3c\ub9ac \uacc4\uce35 \uc0c1\ud638 \uc6b4\uc6a9\uc131\uc758 \uae30\ucd08 \uac1c\ub150 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uad11 \ud30c\uc7a5, \uc804\ub825 \ubc94\uc704, \uac10\ub3c4, \uc804\ub2ec \uac70\ub9ac \ubc0f \ud14c\uc2a4\ud2b8 \ud3ec\uc778\ud2b8\ub97c \uba85\uc2dc\ud568\uc73c\ub85c\uc368 PMD\ub294 \uc11c\ub85c \ub2e4\ub978 \uacf5\uae09\uc5c5\uccb4\uc5d0\uc11c \uc81c\uc870\ub41c \ud2b8\ub79c\uc2a4\uc2dc\ubc84\uac00 \ub3d9\uc77c\ud55c \uad11\uc12c\uc720 \uc778\ud504\ub77c\uc5d0\uc11c \uc608\uce21 \uac00\ub2a5\ud558\uac8c \uc791\ub3d9\ud558\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ub124\ud2b8\uc6cc\ud06c\ub97c \ubc30\ud3ec\ud558\uac70\ub098 \uc5c5\uadf8\ub808\uc774\ub4dc\ud558\ub294 \uc870\uc9c1\uc758 \uacbd\uc6b0, PMD\ub97c \uc774\ud574\ud558\ub294 \uac83\uc774 \uc801\uc808\ud55c \uad11 \ubaa8\ub4c8\uc744 \uc120\ud0dd\ud558\uace0 \uc2e0\ub8b0\uc131 \uc788\uace0 \ud45c\uc900\uc5d0 \ubd80\ud569\ud558\uba70 \ubbf8\ub798\uc5d0\ub3c4 \ub300\uc751 \uac00\ub2a5\ud55c \ub9c1\ud06c\ub97c \uc124\uacc4\ud558\ub294 \ub370 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>LINK-PP\uc758 \uad11 \ud2b8\ub79c\uc2a4\uc2dc\ubc84<\/strong><\/a> \uba85\ud655\ud788 \uc815\uc758\ub41c PMD \uc0ac\uc591\uc744 \ud3ec\ud568\ud558\ubbc0\ub85c, \uac15\ub825\ud558\uace0 \ud45c\uc900\uc5d0 \ubd80\ud569\ud558\ub294 \ub124\ud2b8\uc6cc\ud06c \uc124\uacc4\uc5d0 \ud0c1\uc6d4\ud55c \uc120\ud0dd\uc785\ub2c8\ub2e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>\ubb3c\ub9ac \ub9e4\uccb4 \uc885\uc18d(PMD)\uc740 PHY\uc758 \uad11\ud559 \ubc0f \uc804\uae30\uc801 \uaddc\uce59\u2014\uc989 \ud30c\uc7a5, \ucd9c\ub825 \uc804\ub825, \uc804\ub2ec \uac70\ub9ac \ubc0f \ud14c\uc2a4\ud2b8 \ud3ec\uc778\ud2b8\u2014\ub97c \uc815\uc758\ud569\ub2c8\ub2e4. PMD \uc0ac\uc591\uc744 \uc774\ud574\ud558\uace0 \uc774\uac83\uc774 \ud2b8\ub79c\uc2a4\uc2dc\ubc84 \uc120\ud0dd\uc5d0 \uc5b4\ub5bb\uac8c \uc601\ud5a5\uc744 \ubbf8\uce58\ub294\uc9c0 \uc54c\uc544\ubcf4\uc138\uc694.<\/p>","protected":false},"author":1,"featured_media":3577,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[24,26],"class_list":["post-3578","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/3578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/comments?post=3578"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/3578\/revisions"}],"predecessor-version":[{"id":10826,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/posts\/3578\/revisions\/10826"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/media\/3577"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/media?parent=3578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/categories?post=3578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/ko\/wp-json\/wp\/v2\/tags?post=3578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}