1, imodem ye-optical sisignali ye-optical kwizixhobo zesignali yombane ye-Ethernet, imodem ye-optical ekuqaleni yayibizwa ngokuba yimodem, luhlobo lwezixhobo zekhompyutha, ikwisiphelo sokuthumela ngokuguqulwa kwesignali yedijithali ibe ziisignali ze-analog, kwaye kwisiphelo sokwamkela ngokusebenzisa ukutsalwa kwesignali ye-analog ibe ziisignali zedijithali isixhobo.
Iyunithi yeNethiwekhi yoMbane (i-ONU) yiyunithi yenethiwekhi yombane. I-ONU yahlulwe yaba ziiyunithi zenethiwekhi yombane esebenzayo kunye neeyunithi zenethiwekhi yombane engasebenziyo. I-ONU isetyenziselwa kakhulu ukufumana idatha yokusasazwa ethunyelwa yi-OLTs. Ukongeza kumsebenzi wekati yokukhanya, i-ONU ikwanomsebenzi weswitshi.
2, i-onu yahlulwe yaba yiklasi ye-a, b, c, zonke ezintathu ziyindlela yokufikelela kwi-optical, kodwa ukubonelela abasebenzisi ngenani lee-port, iintlobo ze-port zahlukile, i-optical modem yiklasi ye-onu.
Imodem ye-optical, eyaziwa ngokuba yi-optical cat, sisixhobo senethiwekhi esithumela imiqondiso ye-optical kwezinye izibonakaliso zeprotocol nge-optical fiber media. Sisixhobo sokudlulisa i-relay kwinethiwekhi enkulu yendawo (i-LAN), inethiwekhi yendawo yedolophu (i-MAN), kunye nenethiwekhi yendawo ebanzi (i-WAN). Esi sixhobo senziwe ngokuthumela, ukufumana, ukulawula, ujongano, kunye nokunikezelwa kombane. Sisebenzisa i-chip edibeneyo enkulu, isekethe elula, ukusetyenziswa kwamandla aphantsi, ukuthembeka okuphezulu, isalathisi sesimo se-alamu epheleleyo, kunye nomsebenzi ogqibeleleyo wolawulo lwenethiwekhi.
Unxibelelwano lwefayibha ye-optical luye lwakhula ngokukhawuleza lwaba yindlela ephambili yokudlulisela ulwazi ngenxa yeenzuzo zalo ezifana nebhendi yefrikhwensi ebanzi kunye nomthamo omkhulu. Ukuze kufezekiswe unxibelelwano lwe-optical, kufuneka kwenziwe i-optical modulation kunye ne-demodulation. Ke ngoko, njengesixhobo esiphambili senkqubo yonxibelelwano lwefayibha ye-optical, i-optical modem ifumana ingqwalasela engakumbi. Kukho iintlobo ezimbini zee-optical modulators: i-direct modulator kunye ne-external modulator, kwaye i-optical demodulator yahlulwe yaba ziintlobo ezimbini: ene-amplifier yangaphambili eyakhelwe ngaphakathi nangaphandle kwayo. I-direct modulator kunye ne-demodulator ene-amplifier yangaphambili eyakhelwe ngaphakathi zezona zinto ziphambili kule projekthi. I-Direct modulation ineenzuzo zobulula, ukonga kunye nokuphunyezwa lula, ngelixa i-demodulator ene-amplifier yangaphambili eyakhelwe ngaphakathi ineempawu zokudibanisa okuphezulu kunye nobukhulu obuncinci.
Imodem ye-optical sisixhobo sokudlulisa esinokuqhagamshelwa kwi-intanethi ngoqhagamshelo lwentambo yenethiwekhi, efana nekati yethu ye-intanethi yokukhanya, kodwa isiphelo esiphezulu sekati siqhagamshelwe kwisekethe, kwaye isiphelo esiphezulu semodem ye-optical siqhagamshelwe kwindlela yokukhanya, ngoko ke sibizwa ngokuba yikati yokukhanya. Ikati eqhagamshelwe kwindlela yokukhanya. Isiphelo esisezantsi se-onu kwi-epon/GPON siqhagamshelwe kumsebenzisi.
1, imodem ye-optical luhlobo lwe-onu, yeyomsebenzisi omnye, imodem ye-optical inokuthiwa yi-desktop onu.
2, i-onu ephambili yeyabasebenzisi abaninzi, oko kukuthi, izibuko lombane linezibuko ze-pon ezisi-8 ukuya kwezingama-24. Imodem ye-optical inezibuko zombane ezi-1-4 kuphela.
Umahluko phakathi kwemodem ye-optical kunye ne-ONU:
Imodem ye-optical isetyenziswa kakhulu xa abathengi abaninzi, ikakhulu ukufikelela kwidatha ezinikeleyo.
Uhlobo lwekhadi lemodem ye-optical kunye nedesktop, uhlobo lwekhadi luhlala lubeka igumbi lomatshini.
Idesktop idla ngokubekwa kwiklayenti. I-ONU isetyenziselwa ukufikelela kwinethiwekhi yokuhlala ye-broadband. Umahluko ophambili uvela kwi-optical card room card edibeneyo ukuya kwi-optical cat ye-desktop yeklayenti, isibini see-optical cats sibalelwa kwisibini seefayibha, kwaye ukusuka kwigumbi elidibeneyo le-OLT ukuya kwiklayenti, ii-ONU ezininzi nazo zihlala kwisibini seefayibha, kwaye i-middle idlula kwinkqubo yokuqhekeka. Umahluko phakathi kwe-optical modem kunye ne-ONU kukuba i-ONU igcina izixhobo ze-fiber core, kwaye i-optical modem ingabizi kakhulu, kwaye isibini see-light cats zingamakhulu aliqela. Uhlobo lokusebenzisa, uhlalutyo olupheleleyo lwexabiso, ngokwemeko.
Ixesha lokuthumela: Disemba-14-2023