PON (Passive Optical Network) yog passive optical network, uas txhais tau hais tias ODN (optical distribution network) ntawmOLT(optical kab davhlau ya nyob twg) thiab covONU(optical network unit) tsis muaj cov khoom siv, thiab tsuas yog siv cov fibers optical thiab passive Cheebtsam. PON feem ntau siv cov qauv taw tes-rau-multipoint network, uas yog lub ntsiab thev naus laus zis kom paub FTTB / FTTH.
PON thev naus laus zis muaj ntau cov ntsiab lus, thiab hloov kho tshiab tas li. Txoj kev loj hlob ntawm xPON thev naus laus zis yog los ntawm APON, BPON, thiab tom qab GPON thiab EPON. Cov no yog cov thev naus laus zis ntawm kev sib kis sib txawv thiab cov qauv sib kis tau tsim nyob rau lub sijhawm sib txawv.
EPON yog dab tsi?
EPON (Ethernet Passive Optical Network) yog Ethernet passive optical network. EPON yog raws li PON thev naus laus zis ntawm Ethernet, uas ua ke nrog qhov zoo ntawm PON thev naus laus zis thiab Ethernet thev naus laus zis. Nws txais cov qauv point-to-multipoint thiab passive optical fiber kis tau tus mob los muab ntau yam kev pabcuam rau saum Ethernet. Vim yog kev lag luam thiab kev xa tawm zoo ntawm EPON, nws yog txoj kev sib txuas lus zoo tshaj plaws kom paub txog "peb lub network hauv ib qho" thiab " mais kawg".
GPON yog dab tsi?
GPON (Gigabit-Capable Passive Optical Network) yog Gigabit passive optical network lossis Gigabit passive optical network. Cov qauv siv los ntawm EPON thiab GPON yog txawv. Nws tuaj yeem hais tias GPON yog qib siab dua thiab tuaj yeem xa cov bandwidth ntau dua, thiab tuaj yeem nqa cov neeg siv ntau dua li EPON. Txawm hais tias GPON muaj qhov zoo dua EPON ntawm tus nqi siab thiab ntau yam kev pabcuam, GPON cov cuab yeej siv tau ntau dua thiab nws cov nqi siab dua EPON. Yog li, tam sim no, EPON thiab GPON yog cov thev naus laus zis nrog ntau PON broadband nkag siv. Qhov kev siv tshuab twg los xaiv yog nyob ntawm tus nqi ntawm kev siv fiber ntau optical thiab kev ua lag luam. GPON yuav tsim nyog rau cov neeg siv khoom uas muaj bandwidth siab, ntau qhov kev pabcuam, QoS thiab kev ruaj ntseg thiab ATM thev naus laus zis raws li tus txha caj qaum. Kev txhim kho yav tom ntej yog siab dua bandwidth. Piv txwv li, EPON / GPON thev naus laus zis tau tsim 10 G EPON / 10 G GPON, thiab bandwidth yuav raug txhim kho ntxiv.
Raws li qhov kev thov rau cov neeg muab kev pabcuam network muaj peev xwm nce ntxiv, kev siv ntau yam ntawm kev nkag mus rau hauv tes hauj lwm kuj yuav tsum tau nthuav dav kom tau raws li qhov kev thov loj hlob no. Fiber-to-the-home (FTTH) passive optical network (PON) optical network nkag tau tam sim no yog qhov siv dav tshaj plaws thiab siv tshuab. Qhov zoo ntawm PON thev naus laus zis yog tias nws tuaj yeem txo txoj haujlwm ntawm cov caj qaum kho qhov muag fiber ntau thiab txuag peev; lub network qauv yog hloov tau thiab lub peev xwm nthuav dav yog muaj zog; tus nqi tsis ua haujlwm ntawm cov khoom siv kho qhov muag tsis zoo yog qhov tsawg, thiab nws tsis yooj yim rau kev cuam tshuam los ntawm ib puag ncig sab nraud; thiab lub peev xwm txhawb kev lag luam muaj zog.