{"id":1694,"date":"2021-02-25T10:02:24","date_gmt":"2021-02-25T09:02:24","guid":{"rendered":"http:\/\/blog.exkalibr.cz\/?p=1694"},"modified":"2021-02-25T10:02:24","modified_gmt":"2021-02-25T09:02:24","slug":"jak-vybrat-kategorii-sitovych-prvku","status":"publish","type":"post","link":"https:\/\/blog.exkalibr.cz\/index.php\/2021\/02\/25\/jak-vybrat-kategorii-sitovych-prvku\/","title":{"rendered":"Jak vybrat kategorii s\u00ed\u0165ov\u00fdch prvk\u016f?"},"content":{"rendered":"

<\/h2>\n

Z\u00e1kladn\u00ed rozd\u011blen\u00ed prvk\u016f strukturovan\u00e9 kabel\u00e1\u017ee<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\nOzna\u010den\u00ed kategorie<\/th>\n\nVznik a popis kategorie<\/th>\n\nMaxim\u00e1ln\u00ed p\u0159enosov\u00e1 rychlost<\/th>\n<\/tr>\n<\/thead>\n
\nKategorie 3 (Cat. 3)<\/td>\n\nJe nejni\u017e\u0161\u00ed kategori\u00ed. U prvn\u00edch s\u00edt\u00ed se komponenty kategorie 3\u00a0\u00a0\u00a0pou\u017e\u00edvaly pro p\u0159enos hlasu i dat. Dnes se ji\u017e prvky kategorie 3 ve v\u011bt\u0161in\u011b\u00a0\u00a0\u00a0p\u0159\u00edpad\u016f pou\u017e\u00edvaj\u00ed pouze pro telefonn\u00ed rozvody (nap\u0159. propojovac\u00ed ISDN panely,\u00a0\u00a0\u00a0kabely k telefonn\u00ed \u00fast\u0159edn\u011b \u010di propojovac\u00ed \u0161\u0148\u016fry k telefonn\u00edmu p\u0159\u00edstroji).\u00a0\u00a0\u00a0Maxim\u00e1ln\u00ed p\u0159enosov\u00e1 rychlost, kter\u00e9 bylo mo\u017en\u00e9 dosahovat na kabel\u00e1\u017e\u00edch\u00a0\u00a0\u00a0kategorie 3, byla 10 Mb\/s (protokol 10Base-T).<\/td>\n\n10 Mb\/s<\/td>\n<\/tr>\n
\nKategorie 4 (Cat. 4)<\/td>\n\nTato kategorie se ji\u017e t\u00e9m\u011b\u0159 nepou\u017e\u00edv\u00e1. Byla spojov\u00e1na p\u0159edev\u0161\u00edm se\u00a0\u00a0\u00a0spole\u010dnost\u00ed IBM a jej\u00edmi prvky pro s\u00edt\u011b Token Ring. Kategorie 4 byla siln\u011b\u00a0\u00a0\u00a0zastoupen\u00e1 p\u0159edev\u0161\u00edm v USA, v evropsk\u00fdch standardech nebyla nikdy zm\u00edn\u011bna.<\/td>\n\n16 Mb\/s<\/td>\n<\/tr>\n
\nKategorie 5 (Cat. 5)<\/td>\n\nTato kategorie byla schv\u00e1lena v roce 1995. Nyn\u00ed je ji\u017e nahrazena\u00a0\u00a0\u00a0kategori\u00ed 5E \u2013 tzn. stejn\u011b jako v p\u0159\u00edpad\u011b kategorie 3 a 4, se jedn\u00e1 ji\u017e o\u00a0\u00a0\u00a0historickou kategorii. Maxim\u00e1ln\u00ed p\u0159enosov\u00e1 rychlost, kter\u00e9 bylo mo\u017en\u00e9\u00a0\u00a0\u00a0dosahovat na komponentech kategorie 5 byla 100 Mb\/s (tzv. Fast Ethernet,\u00a0\u00a0\u00a0protokol 100Base-T).<\/td>\n\n100 Mb\/s<\/td>\n<\/tr>\n
\nKategorie 5E (Cat. 5E)<\/td>\n\nVych\u00e1z\u00ed z kategorie 5 a m\u00e1 i stejnou \u0161\u00ed\u0159ku p\u00e1sma (tj. 100 MHz). Z\u00a0\u00a0\u00a0d\u016fvodu cenov\u00e9 dostupnosti je v t\u00e9to chv\u00edli kategorie 5E st\u00e1le nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00ed\u00a0\u00a0\u00a0kategori\u00ed ve strukturovan\u00e9 kabel\u00e1\u017ei. Komponenty kategorie 5E um\u00ed p\u0159en\u00e9st i\u00a0\u00a0\u00a0Gigabit Ethernet v pod\u00e1n\u00ed protokolu 1000BaseT. Nicm\u00e9n\u011b p\u0159enosov\u00e1 rychlost 1\u00a0\u00a0\u00a0Gb\/s je limitn\u00ed rychlost\u00ed pro v\u0161echny komponenty kategorie 5E.<\/td>\n\n1 Gb\/s<\/td>\n<\/tr>\n
\nKategorie 6 (Cat. 6)<\/td>\n\nTato kategorie byla schv\u00e1lena v roce 2002. Pracuje s dvojn\u00e1sobnou\u00a0\u00a0\u00a0\u0161\u00ed\u0159kou p\u00e1sma ne\u017e kategorie 5E (tj. a\u017e 250 MHz). Vy\u0161\u0161\u00ed kvalita komponent s\u00a0\u00a0\u00a0v\u011bt\u0161\u00ed \u0161\u00ed\u0159kou p\u00e1sma zaji\u0161\u0165uje vynikaj\u00edc\u00ed spolehlivost p\u0159enosu Gigabit\u00a0\u00a0\u00a0Ethernetu (1 Gb\/s) u kabel\u00e1\u017en\u00edch syst\u00e9m\u016f kategorie 6 ve srovn\u00e1n\u00ed s kategori\u00ed\u00a0\u00a0\u00a05E a z\u00e1rove\u0148 i podporu dal\u0161\u00edch protokol\u016f (nap\u0159. krom\u011b ji\u017e zm\u00edn\u011bn\u00e9ho\u00a0\u00a0\u00a01000Base-T i 1000Base-TX nebo \u010d\u00e1ste\u010dn\u011b i nov\u00e9ho protokolu 10GBase-T).<\/td>\n\n10 Gb\/s<\/td>\n<\/tr>\n
\nKategorie 6A (Cat. 6A)<\/td>\n\nJe nejnov\u011bj\u0161\u00ed kategorie, kter\u00e1 vznikla v dubnu 2008. V t\u00e9to chv\u00edli je\u00a0\u00a0\u00a0pln\u011b specifikov\u00e1na pouze v americk\u00e9 norm\u011b ANSI\/TIA\/EIA 568B.2-10. S kategori\u00ed\u00a0\u00a0\u00a06A se po\u010d\u00edt\u00e1 p\u0159edev\u0161\u00edm pro plnohodnotn\u00fd p\u0159enos protokolu 10GBase-T na v\u0161echny\u00a0\u00a0\u00a0vzd\u00e1lenosti (rychlost 10 Gb\/s), kter\u00e9 jsou v metalick\u00e9 kabel\u00e1\u017ei b\u011b\u017en\u00e9. Oproti\u00a0\u00a0\u00a0kategorii 6 pracuj\u00ed komponenty kategorie 6A s dvojn\u00e1sobnou \u0161\u00ed\u0159kou p\u00e1sma \u2013 tj.\u00a0\u00a0\u00a0500 MHz, kter\u00e1 poskytuje komponent\u016fm t\u00e9to nov\u00e9 kategorie ji\u017e zm\u00edn\u011bnou vy\u0161\u0161\u00ed\u00a0\u00a0\u00a0datovou propustnost. Kompletn\u00ed schv\u00e1len\u00ed t\u011bchto nov\u00fdch prvk\u016f i v ostatn\u00edch\u00a0\u00a0\u00a0standardech (tj. ISO\/IEC a CENELEC) se o\u010dek\u00e1v\u00e1 ve druh\u00e9 polovin\u011b roku 2009. I\u00a0\u00a0\u00a0kdy\u017e se zpo\u010d\u00e1tku po\u010d\u00edtalo s nasazen\u00edm kategorie 6A p\u0159edev\u0161\u00edm v p\u00e1te\u0159n\u00edch\u00a0\u00a0\u00a0spoj\u00edch nebo datov\u00fdch centrech, mnoz\u00ed v\u00fdrobci (nap\u0159. Solarix, Signamax \u010di\u00a0\u00a0\u00a0RiT) nab\u00edz\u00ed sv\u00e1 10G \u0159e\u0161en\u00ed i pro kabel\u00e1\u017ee b\u011b\u017en\u00fdch LAN s\u00edt\u00ed \u2013 tj. a\u017e k\u00a0\u00a0\u00a0u\u017eivateli na st\u016fl.<\/td>\n\n10 Gb\/s<\/td>\n<\/tr>\n
\nKategorie 7 (Cat. 7)<\/td>\n\nTato kategorie vznikla v roce 1997, schv\u00e1len\u00ed se do\u010dkala v roce 2002,\u00a0\u00a0\u00a0a to nav\u00edc pouze pro kabel a nikoli pro spojovac\u00ed hardware (tj. z\u00e1suvky,\u00a0\u00a0\u00a0patch panely atd.). Pracovn\u00ed frekvence kategorie 7 je nyn\u00ed 600 MHz.<\/td>\n\n10 Gb\/s<\/td>\n<\/tr>\n
\nKategorie 7A (Cat. 7A)<\/td>\n\nVznikne pot\u00e9, co bude pln\u011b schv\u00e1lena kategorie 6A i v evropsk\u00e9 a\u00a0\u00a0\u00a0celosv\u011btov\u00e9 norm\u011b. Sou\u010dasn\u00e1 kategorie 7 toti\u017e bude z d\u016fvodu velk\u00e9 \u201ebl\u00edzkosti\u201c\u00a0\u00a0\u00a0\u0161\u00ed\u0159ky p\u00e1sma s kategori\u00ed 6A (500 MHz vs. 600 MHz) zm\u011bn\u011bna na kategorii s\u00a0\u00a0\u00a0dvojn\u00e1sobnou \u0161\u00ed\u0159kou p\u00e1sma 1000 MHz a s ozna\u010den\u00edm 7A.<\/td>\n\n10 GB\/s<\/td>\n<\/tr>\n
\nKategorie 8 (Cat. 8)<\/td>\n\nNov\u011b vznikaj\u00edc\u00ed kategorie pro vysokorychlostn\u00ed protokol 40Gbase-T s\u00a0\u00a0\u00a0\u0161\u00ed\u0159kou p\u00e1sma 2000 Mhz.<\/td>\n\n40 GB\/s<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

S\u00ed\u0165ov\u00e9 kabely si m\u016f\u017eete vybrat ZDE<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Z\u00e1kladn\u00ed rozd\u011blen\u00ed prvk\u016f strukturovan\u00e9 kabel\u00e1\u017ee Ozna\u010den\u00ed kategorie Vznik a popis kategorie Maxim\u00e1ln\u00ed p\u0159enosov\u00e1 rychlost Kategorie 3 (Cat. 3) Je nejni\u017e\u0161\u00ed kategori\u00ed. U prvn\u00edch s\u00edt\u00ed se komponenty kategorie 3\u00a0\u00a0\u00a0pou\u017e\u00edvaly pro p\u0159enos…<\/p>\n","protected":false},"author":2,"featured_media":1695,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,13],"tags":[154,155],"_links":{"self":[{"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/posts\/1694"}],"collection":[{"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/comments?post=1694"}],"version-history":[{"count":3,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/posts\/1694\/revisions"}],"predecessor-version":[{"id":1698,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/posts\/1694\/revisions\/1698"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/media\/1695"}],"wp:attachment":[{"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/media?parent=1694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/categories?post=1694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.exkalibr.cz\/index.php\/wp-json\/wp\/v2\/tags?post=1694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}