Ukuqonda Isixhumi se-RJ45: Umgogodla Wamanethiwekhi Anezintambo!
Gxumela emhlabeni wokuxhumana kwe-Ethernet ngomhlahlandlela ophelele kusixhumi se-RJ45, ukwakheka kwayo, kanye nendima yayo ebalulekile ekudluliselweni kwedatha ngesivinini esikhulu.
I-Ethernet kanye ne-RJ Standards:
Ubuchwepheshe be-Ethernet buvumela ukuxhumana okungenamthungo phakathi kwamadivayisi amaningi ngaphakathi kwenethiwekhi, okubuswa izivumelwano ezithile eziqinisekisa ukuxhumana okusebenzayo. Ama-Jacks Abhalisiwe (RJ) ayizixhumanisi ezibonakalayo ezijwayelekile eziklanyelwe imidiya ehlukahlukene yokuxhumana. Phakathi kwazo, i-RJ45, i-RJ11, i-RJ48, ne-RJ61 zivamile, ngayinye yakhelwe izinhlelo zokusebenza ezihlukile ngaphakathi kwenethiwekhi ye-Ethernet.
Isixhumi se-RJ45:
Isixhumi se-RJ45, ngokusemthethweni esaziwa ngokuthi i-Registered Jack 45, sesiphenduke indinganiso ye-de facto yoxhumo lwenethiwekhi enezintambo. Iqale yenzelwe izinhlelo zocingo, selokhu yavela ukuthi ibe yonke indawo kunethiwekhi ye-Ethernet. I-“45″ ku-RJ45 isho ukufakwa kuhlu kwayo okuhlukile ngaphakathi kwezicaciso zikajeke obhalisiwe.
Imininingwane Yezobuchwepheshe:
Ibonakala ngesimo sayo esikhulu sefomu uma kuqhathaniswa nezintambo zocingo, isixhumi se-RJ45 sithatha umkhawulokudonsa obanzi, ngokuvamile ofinyelela ku-10 Gbps. Leli khono lesivinini esikhulu, lihambisana nezici zokuphepha ezithuthukisiwe, libeka i-RJ45 njengesixhumi esikhethwayo sokuxhumanisa amakhompyutha omuntu namaseva, amarutha, nezinye izingqalasizinda zenethiwekhi.
Ukubunjwa Kwesakhiwo:
Isixhumi se-RJ45 sinokucushwa kwamaphini angu-8, okubizwa ngokusemthethweni ngokuthi 8P8C, okuvumela ukuxhuma kwezintambo eziyisishiyagalombili. Ivamise ukubhangqwa neShielded Twisted Pair (STP) noma izintambo ze-Unshielded Twisted Pair (UTP), isixhumi se-RJ45 sekhesi lepulasitiki elibonisa ngale linikeza umbono ocacile wezintambo zangaphakathi.
Amazinga ezintambo:
Lapho ehlolisisa, umuntu angakwazi ukubona izintambo eziyisishiyagalombili ezihlukene ngaphakathi kwesixhumi se-RJ45, ezihlukaniswa ngemibala eqinile nenemigqa. Izintambo ze-RJ45 zihlukaniswa ngokusekelwe ekusebenzeni kwayo, nezigaba ezifana ne-Cat 5e, i-Cat 6, ne-Cat 7, ngayinye ihlinzeka ngamazinga ahlukahlukene ekhwalithi yokudlulisela kanye nomkhawulokudonsa.
Ukubhala Umbala Namazinga:
Ukufakwa kwekhodi kombala kwezintambo ze-RJ45 kusezingeni ukuze kube lula ukuhlonza nokuxhumana. Kunezinhlelo ezimbili eziyinhloko zekhodi yombala: i-T568A ne-T568B. I-T568A ejwayelekile ibeka izintambo eziluhlaza ngaphambi kokuwolintshi, kuyilapho i-T568B ihlehlisa leli oda. I-T568A iqinisekisa ukuhambisana okubuyela emuva nezinhlelo zezintambo zefa, kuyilapho i-T568B yakhelwe ukunciphisa umsindo wesignali, ithuthukisa ubuqotho bokudluliswa kwedatha.
Sicela usithinte ukuze uthole ulwazi olwengeziwe lomkhiqizo kanye namakhathalogi.
