1, i-modem ye-optical iyisignali ye-optical emishinini yesignali kagesi ye-Ethernet, i-modem ye-optical ekuqaleni ibizwa ngokuthi i-modem, uhlobo lwehadiwe yekhompyutha, isekugcineni kokuthumela ngokuguqulwa kwesignali yedijithali ibe yisignali ye-analog, kanti ekugcineni kokwamukela ngokususwa kwesignali ye-analog ibe yisignali yedijithali kube idivayisi.
Iyunithi Yenethiwekhi Yokukhanya (i-ONU) iyiyunithi yenethiwekhi yokukhanya. I-ONU ihlukaniswe ngamayunithi enethiwekhi yokukhanya esebenzayo kanye namayunithi enethiwekhi yokukhanya engasebenzi. I-ONU isetshenziswa kakhulu ukwamukela idatha yokusakaza ethunyelwe yi-OLTs. Ngaphezu komsebenzi wekati elikhanyayo, i-ONU inomsebenzi wokushintsha.
2, i-onu ihlukaniswe ngeklasi a, b, c, zonke ezintathu ziwukufinyelela okubonakalayo, kodwa ukuze kunikezwe abasebenzisi inani lamachweba, izinhlobo zamachweba zihlukile, imodemu yokubonakalayo empeleni iyiklasi i-onu.
Imodemu ye-optical, eyaziwa nangokuthi i-optical cat, iyidivayisi yenethiwekhi edlulisela izimpawu ze-optical kwezinye izimpawu zephrothokholi ngemidiya ye-optical fiber. Iyidivayisi yokudlulisa i-relay yenethiwekhi enkulu yendawo (i-LAN), inethiwekhi yendawo yedolobha (i-MAN), kanye nenethiwekhi yendawo ebanzi (i-WAN). Le divayisi yakhiwe ukuthumela, ukwamukela, ukulawula, isikhombikubona, kanye nokunikezwa kwamandla. Isebenzisa i-chip ehlanganisiwe enkulu, isekethe elula, ukusetshenziswa kwamandla okuphansi, ukuthembeka okuphezulu, inkomba yesimo se-alamu ephelele, kanye nomsebenzi wokuphatha inethiwekhi ophelele.
Ukuxhumana nge-optical fiber kuye kwathuthuka ngokushesha kwaba uhlobo oluyinhloko lokudluliselwa kolwazi ngenxa yezinzuzo zako ezifana nebhendi yemvamisa ebanzi kanye nomthamo omkhulu. Ukuze kufezwe ukuxhumana kwe-optical, ukuguquguquka kwe-optical kanye nokuguqulwa kwe-demodulation kumele kwenziwe. Ngakho-ke, njengethuluzi elibalulekile lohlelo lokuxhumana nge-optical fiber, i-optical modem ithola ukunakwa okwengeziwe. Kunezinhlobo ezimbili zama-optical modulator: i-direct modulator kanye ne-external modulator, kanti i-optical demodulator ihlukaniswe ngezinhlobo ezimbili: ene-amplifier yangaphambili eyakhelwe ngaphakathi nangaphandle kwayo. I-direct modulator kanye ne-demodulator ene-amplifier yangaphambili eyakhelwe ngaphakathi yizona zinto ezigxilwe kulo msebenzi. Ukuguquguquka okuqondile kunezinzuzo zobulula, ukonga kanye nokusetshenziswa okulula, kuyilapho i-demodulator ene-amplifier yangaphambili eyakhelwe ngaphakathi inezimpawu zokuhlanganiswa okuphezulu kanye nosayizi omncane.
I-modem ye-optical iyidivayisi yokudlulisa engaxhunywa kwi-inthanethi ngokuxhumeka kwekhebula lenethiwekhi, efana nekati lethu lokukhanya le-inthanethi, kodwa ingxenye engenhla yekati ixhunywe kusekethe, kanti ingxenye engenhla yemodi ye-optical ixhunywe endleleni yokukhanya, ngakho-ke ibizwa ngokuthi ikati lokukhanya. Ikati elixhunywe endleleni yokukhanya. Ingxenye engezansi ye-onu ku-epon/GPON ixhunywe kumsebenzisi.
1, i-optical modem uhlobo lwe-onu, iwumsebenzisi oyedwa, i-optical modem nayo ingashiwo ukuthi i-desktop onu.
2, i-onu eyinhloko ilungele abasebenzisi abaningi, okungukuthi, imbobo kagesi inama-port angu-8 kuya kwangu-24. Imodemu ye-optical inama-port kagesi angu-1-4 kuphela.
Umehluko phakathi kwemodemu ye-optical ne-ONU:
I-modem ye-optical ivame ukusetshenziswa lapho amakhasimende amakhulu, ikakhulukazi ukufinyelela idatha okuzinikele.
Uhlobo lwekhadi le-modem ye-optical kanye nedeskithophu, uhlobo lwekhadi luvame ukubeka igumbi lomshini.
Ideskithophu ivame ukubekwa kuklayenti. I-ONU isetshenziselwa ukufinyelela kunethiwekhi yokuhlala ye-broadband. Umehluko omkhulu usuka ku-optical card room card ehlanganisiwe kuya ku-optical cat yedeskithophu yeklayenti, i-optical cat ihlanganisa i-fiber, futhi kusukela ku-OLT room ehlanganisiwe kuya ku-client client, ama-ONU amaningi nawo athatha i-fiber eyodwa kuphela, kanti i-middle idlula enkambisweni yokuhlukanisa. Umehluko phakathi kwe-optical modem ne-ONU ukuthi i-ONU igcina izinsiza ze-fiber core, kanti i-optical modem ishibhile, kanti i-light cat ingamakhulu amaningana. Uhlobo lokusebenzisa, ukuhlaziywa okuphelele kwezindleko, ngokusho kwesimo.
Isikhathi sokuthunyelwe: Disemba 14-2023