{"id":252,"date":"2026-07-11T15:29:39","date_gmt":"2026-07-11T15:29:39","guid":{"rendered":"https:\/\/kinhnghiemlamviec.com\/?p=252"},"modified":"2026-07-11T15:50:49","modified_gmt":"2026-07-11T15:50:49","slug":"cach-lua-chon-module-sfp-cho-switch-trong-he-thong-cctv","status":"publish","type":"post","link":"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/11\/cach-lua-chon-module-sfp-cho-switch-trong-he-thong-cctv\/","title":{"rendered":"C\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV"},"content":{"rendered":"\n<p>Sau khi l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c <strong>Switch Access<\/strong> v\u00e0 <strong>Switch Core<\/strong>, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 l\u1ef1a ch\u1ecdn <strong>Module SFP<\/strong> ph\u00f9 h\u1ee3p. N\u1ebfu ch\u1ecdn sai module, hai switch c\u00f3 th\u1ec3 kh\u00f4ng k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c ho\u1eb7c t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng \u0111\u00fang nh\u01b0 thi\u1ebft k\u1ebf.<\/p>\n\n\n\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, m\u00ecnh ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng v\u00ed d\u1ee5 <strong>h\u1ec7 th\u1ed1ng 200 camera, 10 t\u1ea7ng<\/strong> \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn c\u00e1ch ch\u1ecdn Module SFP \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-kinh-nghi-m-l-m-vi-c wp-block-embed-kinh-nghi-m-l-m-vi-c\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"Eq1CIwsXKh\"><a href=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/10\/huong-dan-chi-tiet-cach-lua-chon-switch-cho-he-thong-cctv-dap-ung-tai-200-camera\/\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn switch cho h\u1ec7 th\u1ed1ng CCTV \u0111\u00e1p \u1ee9ng t\u1ea3i 200 camera&#8221; &#8212; Kinh Nghi\u1ec7m L\u00e0m Vi\u1ec7c\" src=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/10\/huong-dan-chi-tiet-cach-lua-chon-switch-cho-he-thong-cctv-dap-ung-tai-200-camera\/embed\/#?secret=OdEqM70j32#?secret=Eq1CIwsXKh\" data-secret=\"Eq1CIwsXKh\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 c\u1ed5ng SFP tr\u00ean Switch<\/h2>\n\n\n\n<p>\u0110i\u1ec1u \u0111\u1ea7u ti\u00ean c\u1ea7n ki\u1ec3m tra l\u00e0 <strong>c\u1ed5ng quang tr\u00ean switch h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 bao nhi\u00eau<\/strong>. V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u1ed5ng <strong>SFP<\/strong> s\u1eed d\u1ee5ng Module <strong>1Gbps<\/strong>.<\/li>\n\n\n\n<li>C\u1ed5ng <strong>SFP+<\/strong> s\u1eed d\u1ee5ng Module <strong>10Gbps<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>V\u00ed d\u1ee5 Switch Aruba Instant On 1930 c\u00f3 <strong>4 c\u1ed5ng SFP+<\/strong>, v\u00ec v\u1eady n\u1ebfu mu\u1ed1n k\u1ebft n\u1ed1i b\u1eb1ng c\u00e1p quang th\u00ec b\u1ea1n n\u00ean s\u1eed d\u1ee5ng<strong>Module SFP 1Gbps<\/strong> ho\u1eb7c <strong>Module SFP+ 10Gbps<\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>L\u01b0u \u00fd:<\/strong> Kh\u00f4ng n\u00ean mua Module t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n ho\u1eb7c cao h\u01a1n t\u1ed1c \u0111\u1ed9 c\u1ed5ng tr\u00ean switch h\u1ed7 tr\u1ee3.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch k\u1ebft n\u1ed1i<\/h2>\n\n\n\n<p>Sau khi bi\u1ebft t\u1ed1c \u0111\u1ed9, h\u00e3y \u0111o kho\u1ea3ng c\u00e1ch gi\u1eefa hai switch.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u01b0\u1edbi 60 m\u00e9t => C\u00e1p m\u1ea1ng RJ45.<\/li>\n\n\n\n<li>60 \u2013 550 m\u00e9t => Module SFP \/ SFP+ c\u00e1p quang Multimode.<\/li>\n\n\n\n<li>Tr\u00ean 550 m\u00e9t => Module SFP \/ SFP+ c\u00e1p quang Singlemode<\/li>\n<\/ul>\n\n\n\n<p>V\u00ed d\u1ee5: Switch t\u1ea7ng 8 c\u00e1ch Switch Core kho\u1ea3ng <strong>120 m\u00e9t<\/strong>, l\u00fac n\u00e0y n\u00ean s\u1eed d\u1ee5ng <strong>Module SFP \/ SFP+ k\u1ebft h\u1ee3p c\u00e1p quang Multimode<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng c\u00e1p DAC?<\/h2>\n\n\n\n<p>Ngo\u00e0i Module SFP, nhi\u1ec1u switch c\u00f2n h\u1ed7 tr\u1ee3 <strong>c\u00e1p DAC (Direct Attach Copper)<\/strong>. \u0110\u00e2y l\u00e0 lo\u1ea1i c\u00e1p \u0111\u1ed3ng \u0111\u00e3 t\u00edch h\u1ee3p s\u1eb5n hai \u0111\u1ea7u SFP ho\u1eb7c SFP+, ch\u1ec9 c\u1ea7n c\u1eafm tr\u1ef1c ti\u1ebfp v\u00e0o hai switch m\u00e0 <strong>kh\u00f4ng c\u1ea7n mua th\u00eam Module SFP<\/strong>.<\/p>\n\n\n\n<p>DAC th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u1ebft n\u1ed1i gi\u1eefa <strong>Switch Core v\u00e0 Switch Distribution<\/strong> \u0111\u1eb7t c\u00f9ng t\u1ee7 Rack.<\/li>\n\n\n\n<li>K\u1ebft n\u1ed1i gi\u1eefa <strong>Switch v\u00e0 Server<\/strong> trong ph\u00f2ng m\u00e1y.<\/li>\n\n\n\n<li>Kho\u1ea3ng c\u00e1ch r\u1ea5t ng\u1eafn, th\u01b0\u1eddng <strong>1 m\u00e9t, 3 m\u00e9t, ho\u1eb7c 5 m\u00e9t<\/strong>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>DAC<\/strong><\/td><td><strong>Module SFP + C\u00e1p quang<\/strong><\/td><\/tr><tr><td>Chi ph\u00ed th\u1ea5p<\/td><td>Chi ph\u00ed cao h\u01a1n<\/td><\/tr><tr><td>Kh\u00f4ng c\u1ea7n Module SFP<\/td><td>C\u1ea7n mua Module \u1edf c\u1ea3 hai \u0111\u1ea7u<\/td><\/tr><tr><td>L\u1eafp \u0111\u1eb7t \u0111\u01a1n gi\u1ea3n<\/td><td>Linh ho\u1ea1t kho\u1ea3ng c\u00e1ch<\/td><\/tr><tr><td>Ch\u1ec9 d\u00f9ng kho\u1ea3ng c\u00e1ch ng\u1eafn<\/td><td>Ph\u00f9 h\u1ee3p kho\u1ea3ng c\u00e1ch xa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Kinh nghi\u1ec7m th\u1ef1c t\u1ebf:<\/strong> N\u1ebfu hai switch \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u00f9ng m\u1ed9t t\u1ee7 Rack ho\u1eb7c kho\u1ea3ng c\u00e1ch d\u01b0\u1edbi <strong>5 m\u00e9t<\/strong>, n\u00ean \u01b0u ti\u00ean s\u1eed d\u1ee5ng <strong>c\u00e1p DAC<\/strong> \u0111\u1ec3 ti\u1ebft ki\u1ec7m chi ph\u00ed. Ch\u1ec9 n\u00ean s\u1eed d\u1ee5ng <strong>Module SFP v\u00e0 c\u00e1p quang<\/strong> khi kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a DAC.<\/p>\n\n\n\n<p><strong><span style=\"text-decoration: underline;\">L\u01b0u \u00fd:<\/span><\/strong> T\u1ed1c \u0111\u1ed9 c\u00e1p DAC l\u00e0 10 Gbps, c\u00e1p DAC kh\u00f4ng c\u00f3 lo\u1ea1i t\u1ed1c \u0111\u1ed9 1 Gbps<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 3: Ch\u1ecdn c\u00e1p quang ph\u00f9 h\u1ee3p<\/h2>\n\n\n\n<p>Hi\u1ec7n nay c\u00f3 hai lo\u1ea1i c\u00e1p quang ph\u1ed5 bi\u1ebfn l\u00e0 <strong>Multimode<\/strong> v\u00e0 <strong>Singlemode<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Multimode<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kho\u1ea3ng c\u00e1ch d\u01b0\u1edbi <strong>550 m\u00e9t<\/strong>.<\/li>\n\n\n\n<li>Gi\u00e1 c\u00e1p v\u00e0 Module SFP th\u1ea5p.<\/li>\n\n\n\n<li>Ph\u00f9 h\u1ee3p cho c\u00e1c t\u00f2a nh\u00e0, v\u0103n ph\u00f2ng ho\u1eb7c nh\u00e0 m\u00e1y.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Singlemode<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kho\u1ea3ng c\u00e1ch t\u1eeb <strong>2 km, 10 km ho\u1eb7c xa h\u01a1n<\/strong>.<\/li>\n\n\n\n<li>Gi\u00e1 th\u00e0nh cao h\u01a1n.<\/li>\n\n\n\n<li>Th\u01b0\u1eddng s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c t\u00f2a nh\u00e0 ho\u1eb7c kho\u1ea3ng c\u00e1ch xa.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>N\u1ebfu to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng n\u1eb1m trong c\u00f9ng m\u1ed9t t\u00f2a nh\u00e0 th\u00ec <strong>Multimode<\/strong> th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn h\u1ee3p l\u00fd v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 4: Ch\u1ecdn \u0111\u00fang b\u01b0\u1edbc s\u00f3ng<\/h2>\n\n\n\n<p>Khi s\u1eed d\u1ee5ng Module Singlemode, c\u1ea7n ki\u1ec3m tra b\u01b0\u1edbc s\u00f3ng c\u1ee7a Module \u1edf c\u1ea3 hai \u0111\u1ea7u k\u1ebft n\u1ed1i. V\u00ed d\u1ee5: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ea7u A: <strong>1310nm<\/strong><\/li>\n\n\n\n<li>\u0110\u1ea7u B: <strong>1310nm<\/strong> => K\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu m\u1ed9t \u0111\u1ea7u l\u00e0 <strong>1310nm<\/strong> v\u00e0 \u0111\u1ea7u c\u00f2n l\u1ea1i l\u00e0 <strong>1550nm<\/strong> th\u00ec hai Module s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u01b0\u1edbc 5: Ki\u1ec3m tra \u0111\u1ea7u k\u1ebft n\u1ed1i<\/h2>\n\n\n\n<p>\u0110a s\u1ed1 Module SFP hi\u1ec7n nay s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i <strong>LC Duplex<\/strong>. V\u00ec v\u1eady khi mua c\u00e1p quang, h\u00e3y ki\u1ec3m tra \u0111\u1ea7u c\u00e1p c\u0169ng l\u00e0 <strong>LC Duplex<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u01b0\u01a1ng th\u00edch.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">V\u00ed d\u1ee5 l\u1ef1a ch\u1ecdn Module SFP<\/h2>\n\n\n\n<p>Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 <strong>200 camera, 10 t\u1ea7ng<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Switch Access: Aruba Instant On 1930<\/li>\n\n\n\n<li>Switch Core: Aruba Instant On 1960 ho\u1eb7c Aruba Instant On 1930<\/li>\n\n\n\n<li>Kho\u1ea3ng c\u00e1ch t\u1eeb t\u1ea7ng \u0111\u1ebfn ph\u00f2ng Server kho\u1ea3ng <strong>150 m\u00e9t<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Nh\u01b0 v\u1eady, b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Module <strong>SFP\/SFP+ 1\/10Gbps<\/strong><\/li>\n\n\n\n<li>C\u00e1p quang <strong>Multimode OM3 ho\u1eb7c OM4<\/strong><\/li>\n\n\n\n<li>\u0110\u1ea7u n\u1ed1i <strong>LC Duplex<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u0110\u00e2y l\u00e0 c\u1ea5u h\u00ecnh ph\u1ed5 bi\u1ebfn, chi ph\u00ed h\u1ee3p l\u00fd v\u00e0 \u0111\u00e1p \u1ee9ng t\u1ed1t nhu c\u1ea7u truy\u1ec1n d\u1eef li\u1ec7u trong c\u00e1c t\u00f2a nh\u00e0.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<p>Khi l\u1ef1a ch\u1ecdn Module SFP, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng g\u1eb7p m\u1ed9t s\u1ed1 l\u1ed7i nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ch\u1ecdn module c\u00f3 t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n so v\u1edbi b\u0103ng th\u00f4ng th\u1ef1c t\u1ebf.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng c\u00e1p <strong>Singlemode<\/strong> nh\u01b0ng l\u1ea1i mua Module <strong>Multimode<\/strong>.<\/li>\n\n\n\n<li>Hai \u0111\u1ea7u s\u1eed d\u1ee5ng Module c\u00f3 b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau.<\/li>\n\n\n\n<li>Mua Module kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi Switch.<\/li>\n<\/ul>\n\n\n\n<p>V\u00ec v\u1eady, tr\u01b0\u1edbc khi mua Module SFP, b\u1ea1n n\u00ean ki\u1ec3m tra l\u1ea1i <strong>t\u1ed1c \u0111\u1ed9 c\u1ed5ng<\/strong>, <strong>kho\u1ea3ng c\u00e1ch k\u1ebft n\u1ed1i<\/strong>, <strong>lo\u1ea1i c\u00e1p quang<\/strong> v\u00e0 <strong>kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/strong> c\u1ee7a Switch.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sau khi l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c Switch Access v\u00e0 Switch Core, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 l\u1ef1a ch\u1ecdn Module SFP ph\u00f9 h\u1ee3p. N\u1ebfu ch\u1ecdn sai module, hai switch c\u00f3 th\u1ec3 kh\u00f4ng k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c &hellip; <a title=\"C\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV\" class=\"hm-read-more\" href=\"https:\/\/kinhnghiemlamviec.com\/index.php\/2026\/07\/11\/cach-lua-chon-module-sfp-cho-switch-trong-he-thong-cctv\/\"><span class=\"screen-reader-text\">C\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":255,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,5],"tags":[63,59,58,61,62],"class_list":["post-252","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cctv","category-design-network","tag-camera-ip","tag-module-sfp-2","tag-module-sfp","tag-sfp-switch","tag-switch-cctv"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV - Kinh Nghi\u1ec7m L\u00e0m Vi\u1ec7c<\/title>\n<meta name=\"description\" content=\"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch l\u1ef1a ch\u1ecdn Module SFP cho Switch trong h\u1ec7 th\u1ed1ng CCTV. 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