{"id":22311,"date":"2026-09-21T11:16:16","date_gmt":"2026-09-21T03:16:16","guid":{"rendered":"https:\/\/www.luleey.com\/?p=22311"},"modified":"2026-09-20T11:20:47","modified_gmt":"2026-09-20T03:20:47","slug":"how-to-test-an-sfp-port-with-a-fiber-loopback","status":"publish","type":"post","link":"https:\/\/www.luleey.com\/ja\/how-to-test-an-sfp-port-with-a-fiber-loopback\/","title":{"rendered":"\u30d5\u30a1\u30a4\u30d0\u30fc\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066SFP\u30dd\u30fc\u30c8\u3092\u30c6\u30b9\u30c8\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p class=\"wp-block-wd-paragraph wd-9d78ff3e\">\u5b9b\u5148\uff1a <strong>test a <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/sfp\/\" title=\"SFP \u306e\u6295\u7a3f\u3092\u3059\u3079\u3066\u8868\u793a\">\u306d\u3093\u308a\u3087\u3046\u30d7\u30fc\u30eb<\/a> \u30dd\u30fc\u30c8\u3068 <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/fiber-loopback\/\" title=\"\u300cFiber Loopback\u300d\u306e\u3059\u3079\u3066\u306e\u6295\u7a3f\u3092\u8868\u793a\">\u30d5\u30a1\u30a4\u30d0\u30fb\u30eb\u30fc\u30d7\u30d0\u30c3\u30af<\/a><\/strong>, \u3001\u5149\u9001\u4fe1\u6a5f\u3092\u3001\u9069\u5207\u306b\u6574\u5408\u3055\u308c\u305f\u30d1\u30c3\u30b7\u30d6\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u7d4c\u8def\u3092\u4ecb\u3057\u3066\u53d7\u4fe1\u6a5f\u306b\u518d\u63a5\u7d9a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ed\u30fc\u30ab\u30eb\u306e\u30db\u30b9\u30c8\u30dd\u30fc\u30c8\u3001\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u3001\u304a\u3088\u3073\u30b3\u30cd\u30af\u30bf\u7d4c\u8def\u3092\u3001\u30ea\u30e2\u30fc\u30c8\u306e\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u8a2d\u5099\u3084\u30d4\u30a2\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u5207\u308a\u96e2\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-acbb8b30\">\u3053\u308c\u306f\u9650\u5b9a\u7684\u306a\u8a3a\u65ad\u3067\u3042\u308a\u3001\u5b8c\u5168\u306a\u30ea\u30f3\u30af\u8a8d\u8a3c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002LOS\uff08\u30ea\u30f3\u30af\u72b6\u614b\uff09\u3092\u89e3\u6d88\u3057\u305f\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u8d77\u52d5\u3055\u305b\u305f\u308a\u3059\u308b\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30c6\u30b9\u30c8\u306f\u3001\u9060\u7aef\u306e\u30b1\u30fc\u30d6\u30eb\u3001\u9060\u7aef\u306e\u30c7\u30d0\u30a4\u30b9\u3001VLAN\u8a2d\u5b9a\u3001\u3042\u308b\u3044\u306f\u672c\u756a\u74b0\u5883\u3067\u306e\u76f8\u4e92\u904b\u7528\u6027\u3092\u8a3c\u660e\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4f55\u304b\u3092\u63a5\u7d9a\u3059\u308b\u524d\u306b\u3001\u8fd4\u9001\u3055\u308c\u308b\u5149\u30d1\u30ef\u30fc\u304c\u53d7\u4fe1\u6a5f\u306e\u6700\u5927\u52d5\u4f5c\u5165\u529b\u5024\u3092\u8d85\u3048\u306a\u3044\u3053\u3068\u3082\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-c6fd394d\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-22313\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/test-sfp-port-fiber-loopback-hero-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-dede1808\">\u30d5\u30a1\u30a4\u30d0\u30fc\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u306b\u3088\u308bSFP\u30dd\u30fc\u30c8\u306e\u30c6\u30b9\u30c8\uff1a\u305d\u306e\u5185\u5bb9<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-012700e3\">\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u5149\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306b\u306f\u3001\u9001\u4fe1\u5074\u3068\u53d7\u4fe1\u5074\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30c3\u30b7\u30d6\u30fb\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u30fb\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e60db6ed\"><strong>\u30ed\u30fc\u30ab\u30eb\u9001\u4fe1\uff08TX\uff09\u2192 \u77ed\u8ddd\u96e2\u30d5\u30a1\u30a4\u30d0\u30fc\u7d4c\u8def \u2192 \u30ed\u30fc\u30ab\u30eb\u53d7\u4fe1\uff08RX\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6844dc07\">\u30db\u30b9\u30c8\u3001PHY\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8PMD\u3001\u304a\u3088\u3073\u30dd\u30fc\u30c8\u8a2d\u5b9a\u306b\u3088\u3063\u3066\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u304cRX LOS\u3092\u30af\u30ea\u30a2\u3057\u305f\u308a\u3001\u53d7\u4fe1\u30ed\u30c3\u30af\u3092\u5831\u544a\u3057\u305f\u308a\u3001\u3042\u308b\u3044\u306f\u300cLink Up\u300d\u3092\u8868\u793a\u3057\u305f\u308a\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u90e8\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u306f\u3001\u5c02\u7528\u306e\u8a3a\u65ad\u30e2\u30fc\u30c9\u30842\u3064\u76ee\u306e\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u3068\u306a\u308b\u305f\u3081\u3001\u6709\u52b9\u306a\u30ed\u30fc\u30ab\u30eb\u5149\u30eb\u30fc\u30d7\u3059\u3079\u3066\u306b\u304a\u3044\u3066\u300cLink Up\u300d\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f287cb85\">\u3053\u306e\u30c6\u30b9\u30c8\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30c6\u30b9\u30c8\u6761\u4ef6\u4e0b\u3067\u3053\u308c\u3089\u306e\u30ed\u30fc\u30ab\u30eb\u8981\u7d20\u3092\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30db\u30b9\u30c8\u304c\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u8a8d\u8b58\u3057\u3001\u96fb\u6e90\u3092\u4f9b\u7d66\u3059\u308b\u6a5f\u80fd<\/li>\n\n\n\n<li>\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5149\u9001\u4fe1\u6a5f\u304a\u3088\u3073\u5149\u53d7\u4fe1\u6a5f<\/li>\n\n\n\n<li>\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30b3\u30cd\u30af\u30bf\u3068\u77ed\u3044\u30d5\u30a1\u30a4\u30d0\u30fc\u7d4c\u8def<\/li>\n\n\n\n<li>\u89b3\u6e2c\u3055\u308c\u305f\u72b6\u614b\u3092\u5f15\u304d\u8d77\u3053\u3059\u306e\u306b\u5341\u5206\u306a\u30db\u30b9\u30c8\u5074\u306e\u96fb\u6c17\u7684\uff0fSerDes\u30d1\u30b9<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8f53a1d3\">\u305d\u3046\u3067\u3059 <strong>\u3067\u306f\u306a\u3044<\/strong> \u751f\u7523\u7528\u30c8\u30e9\u30f3\u30af\u3001\u30d1\u30c3\u30c1\u30d1\u30cd\u30eb\u3001\u30b9\u30d7\u30e9\u30a4\u30b9\u3001\u30ea\u30e2\u30fc\u30c8\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u3001\u307e\u305f\u306f\u30ea\u30e2\u30fc\u30c8\u30db\u30b9\u30c8\u3092\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u6709\u7528\u306a\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u81ea\u52d5\u7684\u306b\u751f\u6210\u3057\u305f\u308a\u691c\u8a3c\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u305b\u3093\u3002 \u30b9\u30a4\u30c3\u30c1\u306f\u3001\u901a\u5e38\u306e\u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u30c6\u30b9\u30c8\u306e\u3088\u3046\u306b\u3001\u30dd\u30fc\u30c8\u304b\u3089\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3057\u3001\u305d\u306e\u540c\u3058\u30d5\u30ec\u30fc\u30e0\u3092\u623b\u308a\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30b1\u30c3\u30c8\u30c6\u30b9\u30c8\u306b\u306f\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u8a3a\u65ad\u6a5f\u80fd\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3001\u307e\u305f\u306f\u6587\u66f8\u5316\u3055\u308c\u305f\u30c6\u30b9\u30c8\u65b9\u6cd5\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-6719bf2a\">1. \u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u6b63\u78ba\u306a\u5149\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u5272\u308a\u5f53\u3066\u308b<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-5e634b87\">\u307e\u305a\u3001\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306e\u90e8\u54c1\u756a\u53f7\u3068\u305d\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u306e\u30b3\u30cd\u30af\u30bf\u3001\u7814\u78e8\u72b6\u614b\u3001\u304a\u3088\u3073\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u7a2e\u985e\u3092\u3001\u5358\u306b\u91d1\u5c5e\u88fd\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5f62\u5f0f\u3060\u3051\u3067\u306a\u304f\u3001\u5149PMD\u306b\u5408\u308f\u305b\u3066\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e7724fdb\">\u305f\u3068\u3048\u3070\u3001\u4e00\u822c\u7684\u306a\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9 10GBASE-SR \u5149\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u30de\u30eb\u30c1\u30e2\u30fc\u30c9\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u4e00\u822c\u7684\u306a\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9 10GBASE-LR \u5149\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u30b7\u30f3\u30b0\u30eb\u30e2\u30fc\u30c9\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002IEEE 802.3 \u3067\u306f\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u4f1d\u9001\u901f\u5ea6\u3084\u4f1d\u9001\u5a92\u4f53\u306b\u5fdc\u3058\u3066\u3001\u7570\u306a\u308b\u7269\u7406\u5a92\u4f53\u4ed5\u69d8\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e <a href=\"https:\/\/ieeexplore.ieee.org\/document\/9844436\" target=\"_blank\" rel=\"noopener\">IEEE 802.3-2022 \u8a18\u9332<\/a> \u3053\u308c\u306f\u898f\u683c\u306e\u53c2\u7167\u8cc7\u6599\u3067\u3059\u304c\u3001\u304a\u4f7f\u3044\u306e\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u4f55\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u304b\u306f\u3001\u5177\u4f53\u7684\u306a\u30db\u30b9\u30c8\u304a\u3088\u3073\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2060bef8\">\u4ee5\u4e0b\u306e\u9805\u76ee\u3092\u3059\u3079\u3066\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30db\u30b9\u30c8\u30e2\u30c7\u30eb\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u3001\u304a\u3088\u3073\u5bfe\u5fdc\u3059\u308b\u96fb\u6c17\u7684\u30e2\u30fc\u30c9\uff0fSerDes\u30e2\u30fc\u30c9<\/li>\n\n\n\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u90e8\u54c1\u756a\u53f7\u3001\u30ea\u30d3\u30b8\u30e7\u30f3\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u304a\u3088\u3073\u5149\u5b66PMD<\/li>\n\n\n\n<li>\u5b9f\u969b\u306b\u8a2d\u5b9a\u307e\u305f\u306f\u5408\u610f\u3055\u308c\u305f\u30ec\u30fc\u30c8<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u7a2e\u985e\u3001\u30b3\u30cd\u30af\u30bf\u3001\u7814\u78e8<\/li>\n\n\n\n<li>\u5fc5\u8981\u306aFEC\u3001\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3001\u307e\u305f\u306f\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u306e\u8a2d\u5b9a<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-230dcae2\">SFP\u3001, <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/sfp-2\/\" title=\"SFP+ \u306e\u6295\u7a3f\u3092\u3059\u3079\u3066\u8868\u793a\">SFP+<\/a> \u3042\u308b\u3044\u306f\u3001SFP28\u3068\u3044\u3046\u540d\u79f0\u3060\u3051\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u7591\u554f\u306f\u89e3\u6d88\u3055\u308c\u307e\u305b\u3093\u3002\u7269\u7406\u7684\u306a\u9069\u5408\u6027\u3001\u30db\u30b9\u30c8\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3001\u52d5\u4f5c\u30e2\u30fc\u30c9\u3001\u30ea\u30f3\u30af\u901f\u5ea6\u3001\u304a\u3088\u3073\u5b9f\u7528\u7684\u306a\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u6027\u80fd\u306f\u3001\u305d\u308c\u305e\u308c\u5225\u500b\u306e\u4e8b\u67c4\u3067\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-4a230470\">BiDi\u30c6\u30b9\u30c8\u306b\u306f\u3001\u901a\u5e38\u306e\u30d1\u30c3\u30b7\u30d6\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u4f7f\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044<\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6cb08dd8\">\u4e00\u822c\u7684\u306a\u5358\u4e00\u30d5\u30a1\u30a4\u30d0\u30fc\u306eBiDi\u30da\u30a2\u3067\u306f\u3001\u9001\u4fe1\u6ce2\u9577\u3068\u53d7\u4fe1\u6ce2\u9577\u304c\u4e92\u3044\u306b\u88dc\u5b8c\u3057\u5408\u3046\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3042\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u7279\u5b9a\u306e\u6ce2\u9577\u3067\u9001\u4fe1\u3092\u884c\u3046\u4e00\u65b9\u3067\u3001\u305d\u306e\u53d7\u4fe1\u5074\u3067\u306f\u5225\u306e\u6ce2\u9577\u3092\u53d7\u4fe1\u3059\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u30d1\u30c3\u30b7\u30d6\u30d5\u30a1\u30a4\u30d0\u30fc\u30eb\u30fc\u30d7\u306f\u3001\u9001\u4fe1\u3055\u308c\u305f\u6ce2\u9577\u3092\u305d\u306e\u307e\u307e\u53cd\u5c04\u3055\u305b\u308b\u3060\u3051\u3067\u3001\u6ce2\u9577\u3092\u5909\u63db\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-77800a71\">\u3057\u305f\u304c\u3063\u3066\u3001BiDi\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3001\u30ea\u30f3\u30af\u304c\u78ba\u7acb\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u6b63\u3057\u304f\u30da\u30a2\u30ea\u30f3\u30b0\u3055\u308c\u305f\u76f8\u624b\u5074\u6a5f\u5668\u3001\u307e\u305f\u306f\u6ce2\u9577\u306b\u5bfe\u5fdc\u3057\u305f\u30c6\u30b9\u30c8\u74b0\u5883\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-f6ecaf2a\">2. \u30b7\u30e7\u30fc\u30c8\u30eb\u30fc\u30d7\u3092\u4f5c\u6210\u3059\u308b\u524d\u306b\u3001\u53d7\u4fe1\u6a5f\u306e\u96fb\u6e90\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d841db02\">\u3053\u308c\u306f\u3001\u9577\u8ddd\u96e2\u5149\u901a\u4fe1\u306b\u304a\u3044\u3066\u6700\u3082\u91cd\u8981\u306a\u5b89\u5168\u78ba\u8a8d\u4e8b\u9805\u3067\u3059\u3002\u901a\u4fe1\u30ea\u30f3\u30af\u306b\u306f\u3001\u6570\u30ad\u30ed\u30e1\u30fc\u30c8\u30eb\u306b\u53ca\u3076\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3084\u6570\u30c7\u30b7\u30d9\u30eb\u306e\u6e1b\u8870\u304c\u542b\u307e\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u77ed\u3044\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u884c\u3046\u3068\u3001\u305d\u306e\u6e1b\u8870\u306e\u5927\u90e8\u5206\u304c\u89e3\u6d88\u3055\u308c\u3001\u53d7\u4fe1\u6a5f\u3078\u904e\u5270\u306a\u5149\u30d1\u30ef\u30fc\u304c\u623b\u3063\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8fc4c68c\">\u8a72\u5f53\u3059\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u53c2\u7167\u3057\u3001\u4e88\u60f3\u3055\u308c\u308b\u6700\u5927\u53d7\u4fe1\u30ec\u30d9\u30eb\u3092\u7b97\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6cd63786\"><strong>\u6700\u5927\u9001\u4fe1\u96fb\u529b \u2212 \u6700\u5c0f\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u7d4c\u8def\u640d\u5931 = \u4e88\u60f3\u3055\u308c\u308b\u6700\u5927\u53d7\u4fe1\u96fb\u529b<\/strong><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b78ca695\">\u7d50\u679c\u306f\u3001\u53d7\u4fe1\u8005\u306e <strong>\u6700\u5927\u52d5\u4f5c\u5165\u529b<\/strong> \u305d\u306e\u30e2\u30fc\u30c9\u306b\u3064\u3044\u3066\u3002\u30b3\u30cd\u30af\u30bf\u3001\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3001\u304a\u3088\u3073\u6e1b\u8870\u5668\u306e\u8a31\u5bb9\u8aa4\u5dee\u3092\u542b\u3081\u3066\u304f\u3060\u3055\u3044\u3002\u6700\u5927\u52d5\u4f5c\u5165\u529b\u5024\u306e\u4ee3\u308f\u308a\u306b\u640d\u50b7\u95be\u5024\u3092\u7528\u3044\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3089\u306f\u7570\u306a\u308b\u554f\u3044\u306b\u5bfe\u3059\u308b\u7b54\u3048\u3060\u304b\u3089\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-aeaf3289\">\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u30a2\u30c3\u30d1\u30fc\u30ec\u30b7\u30fc\u30d0\u30fc\u306e\u9650\u754c\u5024\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001\u4f5c\u696d\u3092\u4e2d\u65ad\u3057\u3066\u305d\u306e\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6e1b\u8870\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u9069\u5207\u306a\u4ed5\u69d8\u306e\u6e1b\u8870\u4ed8\u304d\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u307e\u305f\u306f\u5149\u6e1b\u8870\u5668\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30d1\u30c3\u30c1\u30b3\u30fc\u30c9\u3092\u5f37\u304f\u66f2\u3052\u3066\u640d\u5931\u3092\u751f\u3058\u3055\u305b\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6e7f7bc1\">\u63a5\u7d9a\u5f8c\u3001, <a style=\"color: #FF6A00;\" target=\"_blank\" href=\"https:\/\/www.luleey.com\/ja\/tag\/ddm\/\" title=\"DDM \u306e\u6295\u7a3f\u3092\u3059\u3079\u3066\u8868\u793a\">DDM<\/a> \u30e2\u30b8\u30e5\u30fc\u30eb\u3068\u30db\u30b9\u30c8\u306e\u4e21\u65b9\u304c\u305d\u308c\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u6709\u7528\u306a\u7167\u5408\u624b\u6bb5\u3068\u306a\u308a\u307e\u3059\u3002. <a href=\"https:\/\/members.snia.org\/document\/dl\/25916\" target=\"_blank\" rel=\"noopener\">SFF-8472<\/a> \u6e29\u5ea6\u3001\u4f9b\u7d66\u96fb\u5727\u3001TX\u30d0\u30a4\u30a2\u30b9\u3001TX\u96fb\u529b\u3001RX\u96fb\u529b\u306e\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u304a\u308a\u3001OMA\u30ec\u30dd\u30fc\u30c8\u3068\u306f\u533a\u5225\u3057\u3066\u5e73\u5747\u53d7\u4fe1\u96fb\u529b\u3092\u8868\u793a\u3057\u307e\u3059\u3002DDM\u306e\u7cbe\u5ea6\u304a\u3088\u3073\u3057\u304d\u3044\u5024\u306f\u4f9d\u7136\u3068\u3057\u3066\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u4f9d\u5b58\u3059\u308b\u305f\u3081\u3001\u6e2c\u5b9a\u5024\u3092\u6b63\u78ba\u306a\u52d5\u4f5c\u9650\u754c\u5024\u3068\u6bd4\u8f03\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9bb9f6bb\">LuLeey\u2019s <a href=\"https:\/\/www.luleey.com\/ja\/what-is-ddm-dom-in-sfp-transceivers\/\">DDM\/DOM \u30d5\u30a3\u30fc\u30eb\u30c9\u30ac\u30a4\u30c9<\/a> 5\u3064\u306e\u5171\u901a\u306e\u4fa1\u5024\u89b3\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u304a\u308a\u3001\u4e00\u65b9\u3001 <a href=\"https:\/\/www.luleey.com\/ja\/sfp-receiver-overload-can-optical-power-be-too-high\/\">\u30ec\u30b7\u30fc\u30d0\u30fc\u306e\u904e\u8ca0\u8377\u306b\u95a2\u3059\u308b\u30ac\u30a4\u30c9<\/a> \u4e0a\u9650\u30c1\u30a7\u30c3\u30af\u306b\u3064\u3044\u3066\u3001\u3088\u308a\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-42ecff89\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-22312\" src=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow.png\" alt=\"\" title=\"\" srcset=\"https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow.png 1000w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow-800x800.png 800w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow-400x400.png 400w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow-768x768.png 768w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow-12x12.png 12w, https:\/\/www.luleey.com\/wp-content\/uploads\/2026\/09\/safe-sfp-loopback-test-flow-150x150.png 150w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/div>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d72e2a62\">3. \u30ed\u30fc\u30ab\u30eb\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-d2565199\">\u627f\u8a8d\u6e08\u307f\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6642\u9593\u5e2f\u3092\u5229\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u672c\u756a\u74b0\u5883\u306e\u7d4c\u8def\u3092\u5207\u65ad\u3059\u308b\u3068\u3001\u30b5\u30fc\u30d3\u30b9\u304c\u4e2d\u65ad\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3\u3092\u8a18\u9332\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/strong> \u30db\u30b9\u30c8\u30e2\u30c7\u30eb\u3001\u30dd\u30fc\u30c8\u8a2d\u5b9a\u3001\u30e2\u30b8\u30e5\u30fc\u30ebID\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\uff0f\u30c9\u30e9\u30a4\u30d0\u3001\u73fe\u5728\u306e\u30ea\u30f3\u30af\uff0fLOS\u72b6\u614b\u3001DDM\u6e2c\u5b9a\u5024\u3001\u304a\u3088\u3073\u30a8\u30e9\u30fc\u30ab\u30a6\u30f3\u30bf\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002.<\/li>\n\n\n\n<li><strong>\u8a08\u753b\u3055\u308c\u3066\u3044\u308b\u7d44\u307f\u5408\u308f\u305b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/strong> PMD\u3001\u4f1d\u9001\u640d\u5931\u3001\u30d5\u30a1\u30a4\u30d0\u30fc\u30ab\u30c6\u30b4\u30ea\u3001\u30b3\u30cd\u30af\u30bf\u304a\u3088\u3073\u7814\u78e8\u72b6\u614b\u3001\u306a\u3089\u3073\u306b\u5b89\u5168\u53d7\u4fe1\u30ec\u30d9\u30eb\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b3\u30cd\u30af\u30bf\u306e\u5d4c\u5408\u72b6\u614b\u306e\u307f\u306b\u57fa\u3065\u3044\u3066\u4f5c\u696d\u3092\u9032\u3081\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/li>\n\n\n\n<li><strong>\u70b9\u691c\u3057\u3001\u6e05\u6383\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/strong> \u8a8d\u5b9a\u3055\u308c\u305f\u6a5f\u5668\u3092\u4f7f\u7528\u3057\u3066\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u304a\u3088\u3073\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u70b9\u691c\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u6e05\u6383\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e <a href=\"https:\/\/foa.org\/tech\/ref\/testing\/test\/scope.html\" target=\"_blank\" rel=\"noopener\">\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u5354\u4f1a \u30b3\u30cd\u30af\u30bf\u30ac\u30a4\u30c9<\/a> \u3053\u308c\u306f\u3001\u5d4c\u5408\u3057\u305f\u30d5\u30a7\u30eb\u30fc\u30eb\u9593\u3067\u6c5a\u67d3\u7269\u8cea\u304c\u3069\u306e\u3088\u3046\u306b\u4f1d\u64ad\u3059\u308b\u304b\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002\u6c7a\u3057\u3066\u30d5\u30a1\u30a4\u30d0\u30fc\u3084\u5149\u30dd\u30fc\u30c8\u3092\u76f4\u63a5\u8997\u304d\u8fbc\u307e\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u9069\u5207\u306a\u30d1\u30ef\u30fc\u30e1\u30fc\u30bf\u30fc\u3084\u6620\u50cf\u691c\u67fb\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n\n\n\n<li><strong>\u6b63\u3057\u3044\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u633f\u5165\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/strong> \u30b3\u30cd\u30af\u30bf\u306b\u7121\u7406\u306a\u529b\u3092\u52a0\u3048\u305f\u308a\u3001\u306d\u3058\u3063\u305f\u308a\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30ed\u30fc\u30ab\u30ebTX\u3068\u30ed\u30fc\u30ab\u30ebRX\u3092\u63a5\u7d9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30db\u30b9\u30c8\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u3001\u6240\u5b9a\u306e\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3092\u6709\u52b9\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n\n\n\n<li><strong>\u30b9\u30c6\u30fc\u30bf\u30b9\u3068\u5dee\u5206\u3092\u76e3\u8996\u3057\u307e\u3059\u3002.<\/strong> \u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u88c5\u7740\u72b6\u6cc1\u3001TX\u969c\u5bb3\u3001RX LOS\u3001\u30ea\u30f3\u30af\uff0fPCS\u306e\u72b6\u614b\u3001DDM RX\u96fb\u529b\u3001\u30ea\u30f3\u30af\u30a4\u30d9\u30f3\u30c8\u3001\u304a\u3088\u3073\u30a8\u30e9\u30fc\u30ab\u30a6\u30f3\u30bf\u306e\u65b0\u305f\u306a\u5909\u5316\u3092\u78ba\u8a8d\u3059\u308b\u3002\u6642\u9593\u6307\u5b9a\u306b\u3088\u308b\u300c\u524d\u300d\u3068\u300c\u5f8c\u300d\u306e\u6bd4\u8f03\u7d50\u679c\u3092\u8a18\u9332\u3059\u308b\u3002.<\/li>\n\n\n\n<li><strong>\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u5834\u5408\u306e\u307f\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/strong> \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u3001\u30dd\u30fc\u30c8\u8a3a\u65ad\u3084\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u30c6\u30b9\u30c8\u306e\u624b\u9806\u304c\u6587\u66f8\u5316\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u305d\u306e\u624b\u9806\u306b\u6b63\u78ba\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u30c7\u30d0\u30a4\u30b9\u81ea\u4f53\u3078\u306eping\u304c\u7269\u7406\u30dd\u30fc\u30c8\u3092\u7d4c\u7531\u3059\u308b\u3068\u306f\u3001\u6c7a\u3057\u3066\u60f3\u5b9a\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/li>\n\n\n\n<li><strong>\u524a\u9664\u3057\u3066\u5fa9\u5143\u3059\u308b\u3002.<\/strong> \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30dd\u30fc\u30c8\u3092\u7121\u52b9\u5316\u307e\u305f\u306f\u9694\u96e2\u3057\u3001\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u3092\u524a\u9664\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4fdd\u8b77\u30fb\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3057\u3001\u627f\u8a8d\u6e08\u307f\u306e\u8a2d\u5b9a\u3092\u5fa9\u5143\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-f16ced4b\">4. \u7d50\u679c\u3092\u904e\u5927\u8a55\u4fa1\u305b\u305a\u306b\u89e3\u91c8\u3059\u308b<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u89b3\u5bdf<\/th><th>\u5bfe\u5fdc\u6a5f\u80fd<\/th><th>\u6b21\u306b\u78ba\u8a8d\u3059\u3079\u304d\u4e8b\u9805<\/th><\/tr><\/thead><tbody><tr><td>\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u691c\u51fa\u3055\u308c\u307e\u305b\u3093\u3067\u3057\u305f<\/td><td>\u73fe\u5728\u306e\u8a2d\u5b9a\u3067\u306f\u3001\u30db\u30b9\u30c8\u306f\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u8aad\u307f\u53d6\u3063\u305f\u308a\u53d7\u3051\u5165\u308c\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093<\/td><td>\u30b1\u30fc\u30b8\u3001\u96fb\u6e90\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001\u5bfe\u5fdc\u30e2\u30b8\u30e5\u30fc\u30eb\u4e00\u89a7\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001\u304a\u3088\u3073\u30dd\u30fc\u30c8\u30e2\u30fc\u30c9\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/td><\/tr><tr><td>\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u691c\u51fa\u3055\u308c\u305f\u304c\u3001RX LOS\u304c\u5f15\u304d\u7d9a\u304d\u30a2\u30b5\u30fc\u30c8\u3055\u308c\u305f\u307e\u307e\u3068\u306a\u3063\u3066\u3044\u308b<\/td><td>\u30ed\u30fc\u30ab\u30eb\u53d7\u4fe1\u6a5f\u304c\u9069\u5207\u306a\u4fe1\u53f7\u3092\u53d7\u4fe1\u3067\u304d\u3066\u3044\u307e\u305b\u3093<\/td><td>TX\u6709\u52b9\/\u969c\u5bb3\u3001\u30d5\u30a1\u30a4\u30d0\u304a\u3088\u3073\u7814\u78e8\u72b6\u614b\u306e\u4e00\u81f4\u3001\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u306e\u63a5\u7d9a\u72b6\u614b\u3001\u6ce2\u9577\u306e\u6319\u52d5\u3001\u304a\u3088\u3073\u5149\u51fa\u529b\u3092\u78ba\u8a8d\u3059\u308b<\/td><\/tr><tr><td>LOS\u304c\u89e3\u6d88\u3055\u308c\u308b\u304b\u3001\u30ea\u30f3\u30af\u304c\u78ba\u7acb\u3055\u308c\u3001\u30ab\u30a6\u30f3\u30bf\u30fc\u304c\u5b89\u5b9a\u3057\u305f\u72b6\u614b\u306b\u306a\u308b<\/td><td>\u8a66\u9a13\u5bfe\u8c61\u306e\u30ed\u30fc\u30ab\u30eb\u5149\u8def\u306f\u3001\u3053\u308c\u3089\u306e\u6761\u4ef6\u4e0b\u3067\u6b63\u5e38\u306b\u52d5\u4f5c\u3059\u308b<\/td><td>\u751f\u7523\u7528\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u3001\u30d1\u30cd\u30eb\u3001\u30c8\u30e9\u30f3\u30af\u3001\u304a\u3088\u3073\u30ea\u30e2\u30fc\u30c8\u30d4\u30a2\u3078\u3068\u5916\u5074\u3078\u63a5\u7d9a\u3059\u308b<\/td><\/tr><tr><td>\u30ea\u30f3\u30af\u306f\u8868\u793a\u3055\u308c\u308b\u304c\u3001\u30a8\u30e9\u30fc\u304c\u5897\u52a0\u3059\u308b<\/td><td>\u4fe1\u53f7\u306e\u5b58\u5728\u306f\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30d5\u30ec\u30fc\u30e0\u306e\u9001\u4fe1\u3092\u610f\u5473\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u3044<\/td><td>\u96fb\u529b\u5236\u9650\u3001\u6c5a\u67d3\u3001PMD\/\u30ec\u30fc\u30c8\/FEC\u306e\u8a2d\u5b9a\u3001\u304a\u3088\u3073\u30ed\u30fc\u30ab\u30eb\u30e2\u30b8\u30e5\u30fc\u30eb\u3068\u30db\u30b9\u30c8\u9593\u306e\u7d4c\u8def\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/td><\/tr><tr><td>BiDi\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3001\u305d\u308c\u81ea\u4f53\u3078\u306e\u30ea\u30f3\u30af\u3092\u4f5c\u6210\u3057\u307e\u305b\u3093<\/td><td>TX\u3068RX\u306e\u6ce2\u9577\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u3053\u308c\u306f\u6b63\u5e38\u306a\u73fe\u8c61\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/td><td>\u7121\u6599\u306eBiDi\u30d4\u30a2\u3001\u307e\u305f\u306f\u6ce2\u9577\u5bfe\u5fdc\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a56bc152\">\u30ed\u30fc\u30ab\u30eb\u30eb\u30fc\u30d7\u306e\u30c6\u30b9\u30c8\u306b\u6210\u529f\u3059\u308b\u3068\u3001\u6545\u969c\u9818\u57df\u304c\u7d5e\u308a\u8fbc\u307e\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u30c6\u30b9\u30c8\u306f\u3001\u6e29\u5ea6\u30de\u30fc\u30b8\u30f3\u3001\u9577\u671f\u7684\u306a\u8aa4\u5dee\u6027\u80fd\u3001\u3042\u308b\u3044\u306f\u30ea\u30e2\u30fc\u30c8\u30c7\u30d0\u30a4\u30b9\u3068\u306e\u4e92\u63db\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u9006\u306b\u3001\u30eb\u30fc\u30d7\u30c6\u30b9\u30c8\u306b\u5931\u6557\u3057\u305f\u304b\u3089\u3068\u3044\u3063\u3066\u3001\u5fc5\u305a\u3057\u3082\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u4e0d\u5177\u5408\u304c\u3042\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u30c6\u30b9\u30c8\u74b0\u5883\u3001\u30db\u30b9\u30c8\u306e\u52d5\u4f5c\u3001\u30dd\u30fc\u30c8\u306e\u8a2d\u5b9a\u3001\u3042\u308b\u3044\u306f\u5149\u51fa\u529b\u306e\u904e\u5927\u30fb\u904e\u5c0f\u306a\u3069\u304c\u539f\u56e0\u3067\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-da0975f5\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u63a5\u7d9a\u306f\u3067\u304d\u305f\u3082\u306e\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u5834\u5408\u306f\u3001LuLeey\u306e <a href=\"https:\/\/www.luleey.com\/ja\/sfp-crc-errors-with-normal-rx-power-what-to-check\/\">SFP CRC \u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u30ac\u30a4\u30c9<\/a> \u904e\u53bb\u306e\u5408\u8a08\u5024\u3067\u306f\u306a\u304f\u3001\u6700\u65b0\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\u306e\u5dee\u5206\u3092\u6bd4\u8f03\u3059\u308b\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-bb1f8201\">LuLeey Loopback\u306e\u9078\u3073\u65b9<\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2eacb4f2\">LuLeey\u2019s <a href=\"https:\/\/www.luleey.com\/ja\/product\/fiber-optic-loopback-lc-upc-om3-mm\/\">LC\/UPC OM3 \u30de\u30eb\u30c1\u30e2\u30fc\u30c9\u30d5\u30a1\u30a4\u30d0\u30fc \u30eb\u30fc\u30d7\u30d0\u30c3\u30af<\/a> 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