1, modemu ya kuwala ndi chizindikiro cha kuwala mu zida zamagetsi zamagetsi za Efaneti, modemu ya kuwala imatchedwa modemu, ndi mtundu wa hardware yamakompyuta, yomwe ili pamapeto otumizira kupyolera mu kusintha kwa ma sigino a digito kukhala ma sigino a analogi, ndipo polandila kutsitsa chizindikiro cha analogi kukhala chizindikiro cha digito pa chipangizo.
An Optical Network Unit (ONU) ndi gawo la optical network.The ONU imagawidwa m'mayunitsi ogwiritsira ntchito optical network ndi passive optical network unit.ONU imagwiritsidwa ntchito makamaka polandila zofalitsa zotumizidwa ndi OLTs.Kuphatikiza pa ntchito ya mphaka wopepuka, ONU ilinso ndi ntchito yosinthira.
2, onu imagawidwa kukhala, b, c kalasi, onse atatu ali ndi mwayi wofikira, koma kuti apatse ogwiritsa ntchito kuchuluka kwa madoko, mitundu yamadoko ndi yosiyana, modem ya kuwala kwenikweni ndi gulu la onu.
Optical modemu, yomwe imadziwikanso kuti optical cat, ndi chipangizo chapaintaneti chomwe chimatumiza ma siginecha amtundu wina kupita ku ma protocol ena kudzera mu media media.Ndi chipangizo chotumizirana ma relay cha netiweki yayikulu yadera (LAN), netiweki ya metropolitan (MAN), ndi netiweki yadera lalikulu (WAN).Chipangizocho chimapangidwa ndi kutumiza, kulandira, kuwongolera, mawonekedwe, ndi magetsi.Imatengera chip chachikulu chophatikizika, dera losavuta, kugwiritsa ntchito mphamvu pang'ono, kudalirika kwakukulu, chizindikiro chathunthu cha alamu, komanso ntchito yabwino yoyang'anira maukonde.
Kulankhulana kwa ma fiber owoneka bwino kwakula mwachangu kukhala njira yayikulu yotumizira zidziwitso chifukwa cha zabwino zake monga ma frequency band ndi kuchuluka kwakukulu.Kuti muzindikire kulumikizana kwa kuwala, kusinthasintha kwa kuwala ndi kufooketsa kuyenera kuchitika.Chifukwa chake, monga chida chofunikira cha optical fiber communication system, modem ya kuwala ikulandila chidwi chochulukirapo.Pali mitundu iwiri ya optical modulators: modulator mwachindunji ndi modulator yakunja, ndipo optical demodulator imagawidwa m'mitundu iwiri: yokhala ndi komanso yopanda amplifier yakutsogolo.Direct modulator ndi demodulator yokhala ndi amplifier yakutsogolo ndiye cholinga cha polojekitiyi.Kusinthasintha kwachindunji kumakhala ndi ubwino wophweka, chuma ndi kukhazikitsa kosavuta, pamene demodulator yokhala ndi amplifier yomangidwa kutsogolo ili ndi makhalidwe a kuphatikiza kwakukulu ndi kukula kochepa.
modemu kuwala ndi kufala chipangizo kuti akhoza olumikizidwa kwa Intaneti ndi kugwirizana kwa chingwe maukonde, ofanana ndi Internet kuwala mphaka, koma kumtunda kwa mphaka chikugwirizana ndi dera, ndi chapamwamba chapamwamba modemis kuwala chikugwirizana. kunjira yowala, motero amatchedwa mphaka wopepuka.Mphaka wolumikizidwa kunjira yowunikira.Mapeto apansi a onu mu epon/GPON amalumikizidwa ndi wogwiritsa ntchito.
1, modem ya optical ndi mtundu wa onu, ndi wogwiritsa ntchito m'modzi, modem ya kuwala imathanso kunenedwa kuti ndi desktop onu.
2, onu yayikulu ndi ya ogwiritsa ntchito ambiri, ndiye kuti, doko lamagetsi lili ndi madoko 8 mpaka 24.Modem ya kuwala ili ndi madoko amagetsi a 1-4 okha.
Kusiyana pakati pa Optical modem ndi ONU:
Optical modemu nthawi zambiri amagwiritsidwa ntchito ngati makasitomala akuluakulu, makamaka pakupeza deta yodzipereka.
Optical modemu khadi mtundu ndi kompyuta, mtundu khadi zambiri kuika makina chipinda.
Desktop nthawi zambiri imayikidwa pa kasitomala.ONU imagwiritsidwa ntchito pa intaneti ya Broadband Residence Network.Kusiyanitsa kwakukulu ndikuchokera ku chipinda chophatikizira cha makadi owoneka ngati mphaka kupita kumphaka wowoneka bwino wamakasitomala, amphaka awiri owoneka bwino amakhala ndi ulusi, komanso kuchokera kuchipinda chophatikizika cha OLT kupita kwa kasitomala ma ONU angapo amakhala ndi ulusi umodzi wokha, ndipo chapakati chimadutsa munjira yogawanika.Kusiyana pakati pa modem ya kuwala ndi ONU ndikuti ONU imasunga zida za fiber core, ndipo modem ya kuwala ndi yotsika mtengo, ndipo amphaka awiri owala ndi zidutswa mazana angapo.Ndi mtundu wanji woti mugwiritse ntchito, kusanthula kwathunthu kwa mtengo, malinga ndi momwe zilili.
Nthawi yotumiza: Dec-14-2023