I-modem yekhamera ixhuma inethiwekhi yekhaya emgqeni wekhebula lokuhlala womhlinzeki wesevisi ye-intanethi . Lezi modemu zifaka router broadband ekugcineni, ngokujwayelekile ngekhebula le- USB noma ikhebula le- Ethernet , kanye nesikhumulo sodonga (esiholela ekutheni ikhebula lokuhlala) ekugcineni.
Kwezinye izimo, abathengi kufanele bathenge lezi modem zekhebula ngokuqondile , kodwa kwezinye izimo akufanele, njengoba kuchaziwe ngezansi.
I-DOCSIS ne-Cable Modems
I- Data Over Data Cable Interface Specification (DOCSIS) standard isekela amanethiwekhi wekhebula le-modem. Yonke inethiwekhi ye-intanethi ye-cable broadband idinga ukusebenzisa i-modem ehambisanayo ye-DOCSIS.
Izinguqulo ezintathu ezihlukene zeModemu ze-DOCSIS zikhona.
- Izinguqulo ze-DOCSIS 1.0 kanye no-1.1 zombili zenziwa zitholakala ngasekupheleni kwawo-1990. Zisasebenzi manje ezindaweni eziningi zomhlaba. Lezi modemu zisekela ku-38 Mbps zokulandwa nokulayishwa kwe-9 Mbps.
- I-DOCSIS 2.0 isekela okufanayo ama-38 Mbps okulanda ngesivinini njengo-1.x kodwa yandisa ukuphakama komkhawulokudonsa okuphezulu okuyi- 27 Mbps. Amamodeli amasha e-D2.x angase asekele i- IPv6 (hlola imibhalo yomkhiqizo ukuqinisekisa).
- I-DOCSIS 3 - izinguqulo ezingu-3.0 no-3.1 konke ukusekela i-IPv6 kanye nokuxhaswa okuphezulu kakhulu kwe-bandwidth kune-D1.x / D2.x, ngaphezu kwe-100 Mbps. Zibuye zihambelane emuva emuva nezinguqulo ezindala ze-DOCSIS namanethiwekhi.
Ngokuvamile uzofuna ukuthola i-modem ye-D3 yekhebula le-intanethi. Nakuba amanani omodemu amasha we-D3 angaphezulu kunezinguqulo ezindala, umehluko wamanani usuke wehle kakhulu eminyakeni embalwa edlule. Imikhiqizo ye-D3 kufanele inikeze isikhathi eside kakhulu sokuphila isikhathi eside kunezinguqulo zakudala, futhi (kuye ngokusetha kwenethiwekhi yomhlinzeki) zingase zinike amandla ukuxhumana okusheshayo kunamamodeli amadala.
Qaphela ukuthi abahlinzeki be-intanethi baye baphawula ngamakhasimende abo imali ephakeme ngenyanga yonke imali yokusebenzisa i-modem ye-D3 kunethiwekhi yabo uma kuqhathaniswa nezinguqulo zakudala (ngenxa yokwanda kwenethiwekhi ye-D3 modem engakwazi ukukhiqiza). Hlola nomhlinzeki wakho ukuze unqume ukuthi lokhu kuyisici esinqumweni sakho sokuthenga.
Lapho Ungathengi I-Modem Yekhamera
Akufanele uthenge i-modem yekhebula ngayinye yezizathu ezintathu:
- imigomo yesevisi yakho ye-intanethi idinga amakhasimende ukuthi asebenzise kuphela amamodeli anikwe umhlinzeki
- iphakethe lakho le-inthanethi kudinga ukusebenzisa idivaysi yokungena engenawaya yokuhlala (bheka ngezansi) esikhundleni somodemu
- kungenzeka ukuthi uyiswe endaweni ehlukile maduzane futhi ungagcina imali yokuqasha imodemu (bheka ngezansi)
Ukuqasha imodemu yekhebula
Ngaphandle kokuthi uhlele ukuthuthela endaweni ehlukile kungakapheli unyaka noma ngaphezulu, ukuthenga i-modem yekhebula kusindisa imali ngokuhamba kwesikhathi ngokuqasha eyodwa. Ngokubuyisela ukuhlinzeka ngeyunithi yesiqinisekiso sokuthi sihambisana, abahlinzeki be-intanethi bavame ukukhokhisa okungenani u-$ 5 USD ngenyanga ukuze banikeze imodemu yokuqasha. Iyunithi ingase ibe yimboni esetshenziswe ngaphambilini, futhi uma ihluleka ngokuphelele (noma iqala ukusebenza ngokungafani), umhlinzeki angase aphuze ukuyifaka esikhundleni.
Ukuze uqinisekise ukuthi uthenge i-modem evulekile ehambisana nenethiwekhi yakho yomhlinzeki we-intanethi, hlola nabangani noma umndeni osebenzisa umhlinzeki ofanayo. Izingosi zokusiza ezitolo ze-inthanethi kanye ne-tech nazo zigcina uhlu lwamamodeli ahambisana nabahlinzeki abakhulu. Thenga leyunithi kusuka emthonjeni ovuma ukubuya, ukuze uzame futhi uyishintshe uma kunesidingo.
Izingosi ezingenazintambo zekhompyutha Internet
Abanye abahlinzeki be-broadband banikela amakhasimende abo iyunithi ehlanganisa imisebenzi ye-modem engenazintambo kanye ne-broadband kudivayisi eyodwa. Izindlela ezingenazintambo ezisetshenziselwa ikhebula le-intanethi zakhele imodemu ye-DOCSIS. Ukubhaliselwa kwamasevisi e-intanethi, ithelevishini kanye nefoni okuhlangene ngezinye izikhathi kudinga ukusebenzisa la madivayisi esikhundleni samamodeli ahlukile. Hlola nomhlinzeki wakho uma ungaqiniseki ngezidingo zabo.