Ukusheshisa nokuphepha kukhona izinzuzo ezimbili ze-SONET
I-SONET iyinhlangano yobuchwepheshe benethiwekhi engqimba eyakhelwe ukuphatha imithwalo emikhulu yemigwaqo emadolobheni amade afana ne- fiber optic cabling . I-SONET ekuqaleni yenzelwe iNational National Standards Institute ye-US yenethiwekhi yocingo yomphakathi phakathi nawo-1980. Le protocol yokuxhumana yedijithali ehleliwe idlulisela ukuhambisa okuningi kwedatha ngesikhathi esifanayo.
Izinhlamvu ze-Sonet
I-SONET inezici eziningana ezenza kube okuthakazelisayo, kubandakanya:
- I-SONET idinga imishini encane kunamanye ama-protocol futhi inikeza ukwandiseka kwenethiwekhi.
- I-SONET ichaza izindinganiso ezicacile zokusebenzisana phakathi kwemikhiqizo eyahlukene yabathengisi.
- I-SONET ingathwala cishe noma yimuphi umgomo ophezulu wezinga elihlanganisa i-IP.
- I-SONET ihlanganisa ukwesekwa okwakhelwe ngaphakathi ukuze kube lula ukuphathwa nokugcinwa.
- I-SONET isekela zonke izinhlobo zethrafikhi kufaka phakathi izwi, idatha, nevidiyo.
- I-SONET inikeza ukuphepha okuphakeme kunamanye ama-protocol.
Ukungahambi kahle kwe-SONET yindleko ephezulu.
I-SONET isetshenziswa kakhulu kumanethiwekhi othwala abathintekayo. Itholakala nakuma-campuses nasezikhungweni zezindiza.
Ukusebenza
I-SONET yenza ngesivinini esikhulu kakhulu. Esikhathini sokungena sokuqala, okuthiwa i-STS-1, i-SONET isekela ama-51.84 Mbps. Izinga elilandelayo le-SONET ukusayina, i-STS-3, isekela kathathu umkhawulokudonsa, noma u-155.52 Mbps. Amazinga aphezulu we-SONET ukusayina kukwandisa umkhawulokudonsa ngokuphindaphindiwe kwezine, kuze kube ngu-40 Gbps.
Isivinini se-SONET senze ubuchwepheshe bukhuphisana nezinye izindlela ezifana ne-Asynchronous Transfer Mode kanye ne- Gigabit Ethernet iminyaka eminingi. Nokho, njengoba izindinganiso ze-Ethernet zithuthukile kule minyaka engamashumi amabili edlule, isiyinto ethandwa esikhundleni sokwethulwa kwezingqalasizinda ze-SONET.