1, modemu yowala ndi chizindikiro chowala chomwe chimalowa mu zida zamagetsi za Ethernet, modemu yowala poyamba imatchedwa modemu, ndi mtundu wa zida zamakompyuta, imatumizidwa kudzera mu kusintha kwa zizindikiro za digito kukhala zizindikiro za analog, ndipo kumapeto kolandira kudzera mu kugawa zizindikiro za analog kukhala zizindikiro za digito ndi chipangizo.
Chigawo cha Optical Network (ONU) ndi gawo la optical network. ONU imagawidwa m'magulu a active optical network ndi ma passive optical network units. ONU imagwiritsidwa ntchito makamaka kulandira deta yofalitsidwa yotumizidwa ndi OLTs. Kuwonjezera pa ntchito ya light cat, ONU ilinso ndi ntchito ya switch.
2, onu yagawidwa m'magulu a a, b, c, onse atatu ndi optical access, koma kuti apatse ogwiritsa ntchito chiwerengero cha madoko, mitundu ya madoko ndi yosiyana, modem ya optical kwenikweni ndi kalasi ya onu.
Modemu ya Optical, yomwe imadziwikanso kuti optical cat, ndi chipangizo cha netiweki chomwe chimatumiza zizindikiro za kuwala ku zizindikiro zina za protocol kudzera mu fiber media. Ndi chipangizo chotumizira mauthenga cha netiweki yayikulu ya m'deralo (LAN), netiweki ya m'dera la mizinda (MAN), ndi netiweki ya m'dera lonse (WAN). Chipangizochi chimapangidwa ndi kutumiza, kulandira, kulamulira, mawonekedwe, ndi magetsi. Chimagwiritsa ntchito chip yolumikizidwa kwambiri, dera losavuta, kugwiritsa ntchito mphamvu zochepa, kudalirika kwambiri, chizindikiro chokwanira cha alamu, komanso ntchito yabwino yoyang'anira netiweki.
Kulankhulana kwa ulusi wa kuwala kwakula mofulumira kukhala njira yayikulu yotumizira uthenga chifukwa cha zabwino zake monga band yolumikizirana pafupipafupi komanso mphamvu yayikulu. Kuti kulumikizana kwa kuwala kuchitike, kusintha kwa kuwala ndi kuchotsera ziyenera kuchitika. Chifukwa chake, monga chipangizo chofunikira kwambiri cha njira yolumikizirana ya ulusi wa kuwala, modemu ya kuwala ikulandira chidwi chochulukirapo. Pali mitundu iwiri ya ma modulators optical: modulator yolunjika ndi modulator yakunja, ndipo demodulator yowongolera kuwala imagawidwa m'mitundu iwiri: yokhala ndi ndi yopanda amplifier yakutsogolo. Modulator yolunjika ndi demodulator yokhala ndi amplifier yakutsogolo yomangidwa mkati ndiye cholinga cha polojekitiyi. Kusinthasintha mwachindunji kuli ndi ubwino wosavuta, wosawononga ndalama komanso wosavuta kugwiritsa ntchito, pomwe demodulator yokhala ndi amplifier yakutsogolo yomangidwa mkati ili ndi mawonekedwe ophatikizana kwambiri komanso kukula kochepa.
Modemu ya kuwala ndi chipangizo chotumizira mauthenga chomwe chingalumikizidwe ndi intaneti pogwiritsa ntchito chingwe cha netiweki, chofanana ndi chida chathu cha kuwala cha intaneti, koma mbali yakumtunda ya mphaka imalumikizidwa ndi dera, ndipo mbali yakumtunda ya modemu ya kuwala imalumikizidwa ndi njira yowunikira, kotero imatchedwa mphaka yowunikira. Mphaka wolumikizidwa ndi njira yowunikira. Mbali yakumunsi ya onu mu epon/GPON imalumikizidwa ndi wogwiritsa ntchito.
1, modemu yowunikira ndi mtundu wa onu, ndi ya wogwiritsa ntchito m'modzi, modemu yowunikira imathanso kutchedwa kuti desktop onu.
2, onu yayikulu ndi ya ogwiritsa ntchito ambiri, kutanthauza kuti, doko lamagetsi lili ndi ma pon ports 8 mpaka 24. Modem yowunikira ili ndi ma 1-4 amagetsi okha.
Kusiyana pakati pa modemu ya kuwala ndi ONU:
Modemu yowunikira nthawi zambiri imagwiritsidwa ntchito ndi makasitomala akuluakulu, makamaka popereka deta yodzipereka.
Mtundu wa khadi la modemu ya kuwala ndi kompyuta, mtundu wa khadi nthawi zambiri umakhala ndi chipinda cha makina.
Kompyuta nthawi zambiri imayikidwa pa kasitomala. ONU imagwiritsidwa ntchito polumikizira netiweki yapaintaneti yapaintaneti. Kusiyana kwakukulu ndikuchokera ku khadi lolumikizidwa la chipinda kupita ku khadi lowunikira la desktop la kasitomala, amphaka awiri owoneka amawerengera ulusi, ndipo kuchokera ku chipinda cholumikizidwa cha OLT kupita ku kasitomala ma ONU angapo amakhalanso ndi ulusi umodzi wokha, ndipo pakati padutsa njira yogawa. Kusiyana pakati pa modemu yowoneka ndi ONU ndikuti ONU imasunga zinthu zapakati pa ulusi, ndipo modemu yowoneka ndi yotsika mtengo, ndipo amphaka awiri opepuka ndi zidutswa mazana angapo. Mtundu woti mugwiritse ntchito, kusanthula kwathunthu kwa mtengo, malinga ndi momwe zinthu zilili.
Nthawi yotumizira: Disembala 14-2023