Yonke Ubuchwepheshe be-DLS Yaba yi-Asymmetric noma i-Symmetric
I-DSL (i-Digital Subscriber Line) isevisi ye-intanethi esheshayo yamakhaya namabhizinisi aphikisana ezindaweni eziningi zezwe ngekhebula nakwezinye izinhlobo zezinsizakalo ze-intanethi ye-broadband. I-DSL inikeza inethiwekhi ye-broadband isebenzisa umugqa wocingo wethusi. Iningi lezinsizakalo ze-DSL zisebenza njenge-asymmetric. Zonke izinhlobo zesevisi ye-DSL ye-intanethi ingahlelwa ngezigaba njengama-asymmetric noma ama-symmetric. Isevisi enhle kakhulu kuwe incike ekutheni ukwenza ukusakazwa okuningi noma udinga usizo lokuxhumana ngezwi kanye nevidiyo ngesikhathi esisodwa.
I-DSL ye-Asymmetric
Izinhlobo ezingafani ze-DSL zokuxhumeka zinikeza ukuhamba komkhawulo wokuxhumana wenethiwekhi ukulandwa kusuka kumhlinzeki wesevisi ye-intanethi kumakhompiyutha wabhalisile kunokuba ulayishe kwenye indlela. Ngokunciphisa inani le-bandwidth elitholakale ngaphesheya, abahlinzeki bezinsizakalo bayakwazi ukunikeza umkhawulokudonsa okweqile ngaphezulu, obonisa izidingo ezijwayelekile zabathengi.
I-DSL ye-ASymmetric iyinhlangano ethandwayo yokuhlala ye- DSL lapho abasebenzisi be-intanethi basekhaya basebenzise khona kakhulu umkhawulokudonsa ophansi.
Amafomu avamile we-DSL asymmetric afaka okulandelayo:
- I-ADSL (i-Asymmetrical Digital Subscriber Line) inezinga elingezansi elingaphansi kwezingu-8 Mbps kanye nesilinganiso esiphakeme sama-384 Kbps. Isekela ukuhanjiswa kwefoni nokudluliswa kwedatha ngesikhathi esifanayo.
- I-ADSL engu-2 + inguqulo entsha ye-ADSL enika ngesivinini sokulanda kufikele ku-20 Mbps futhi ulayishe ngesivinini esingu-850 Kbps.
- I-ADSL Lite noma i- G.Lite inguqulo ye-ADSL enikezela ngesivinini esisheshayo kufika ku-1 Mbps isivinini esingezansi kanye nesivinini esingu-512 Kbps sokulayisha.
- I-R-ADSL (I-Rate-Adaptive Digital Subscriber Line) inikeza amazinga afanayo okudlulisela njenge-ADSL, kodwa isivinini sokudlulisa singashintshwa yi-modem.
- I-VDSL (I-High High-Rate Digital Subscriber Line) isevisi ye-DSL esheshayo. Ihlinzeka ngamanani aphansi afika kuma-52 Mbps namanani aphezulu afika ku-2.3 Mbps ngaphezu kwethusi eyodwa yethusi.
I-DSM Symmetric
Izinhlobo ze-Symmetric zokuxhumeka kwe-DSL zinikeza umkhawulokudonsa ofanayo kokubili ukulayishwa nokulandwa. I-Symmetric technology ye-DSL ithandwa kakhulu ngezinsizakalo ze-DSL zebhizinisi njengoba izinkampani zivame ukuba nezidingo ezinkulu zokudlulisa idatha. Kubuye ubuchwepheshe bokuzikhethela kokuxhumana kwezwi nevidiyo ngesikhathi esisodwa, okudinga isivinini esikhulu kuzo zombili izinkomba zokuxhumana okusebenzayo.
Amafomu e-DSL ahambisanayo afaka:
- I-SDSL (i-Symmetric Digital Subscriber Line) inikeza ukulinganisa okulinganayo nokuhamba okuphansi kwe-1.54 Mbps.
- I-SHDSL (i-Symmetrical High-Speed High Subscriber Line Line) ubuchwepheshe obufanayo njenge-SDSL, kodwa amazinga amabili avunyelwe ngokwehlukana. I-SHDSL ivunywe yi-International Telecommunications Union, futhi i-SDSL yamukelwa yi-European Telecommunications Standards Institute.
- I-HSDL (I-High Bit-Rate Digital Subscriber Line) yasungulwa ekuqaleni kwawo-1990, okwenza kube yinye yezinhlobo ezindala kunazo zonke ze-DSL ehambisanayo. I-HDSL inikeze amanani wedatha kuze kufike ku-2.048 Mbps kodwa idinga imigqa eminingi yefoni, ekugcineni eyenze ingasebenzi.
Ezinye izinhlobo ze-DSL
I-IDSL (I-ISDN Digital Subscriber Line) iyinhlangano ye-hybrid DSL / ISDN . Yakhiwe kanye nezinye izinhlobo ze-DSL kepha ayifuni ukusetshenziswa namuhla ngoba kunesivinini esincane (144 Kbps isilinganiso esiphezulu sedatha) sisekela. I-IDSL inikeza ukuxhumeka njalo, ngokungafani ne-ISDN.