Thaum nws los txog rau cov khoom siv sab hauv hauv kev siv broadband fiber ntau, peb feem ntau pom cov lus Askiv xws li ONU, ONT, SFU, thiab HGU. Cov ntsiab lus no txhais li cas? Qhov txawv li cas?
1. ONUs thiab ONTs
Cov ntawv thov tseem ceeb ntawm kev siv broadband optical fiber ntau muaj xws li: FTTH, FTTO, thiab FTTB, thiab cov ntaub ntawv ntawm cov khoom siv sab nraud yog txawv raws li ntau hom kev thov. Cov khoom siv sab nraud ntawm FTTH thiab FTTO yog siv los ntawm ib tus neeg siv, hu uaONT(Kev kho qhov muag network davhlau ya nyob twg, kho qhov muag network davhlau ya nyob twg), thiab cov khoom siv sab nraud ntawm FTTB yog sib koom los ntawm ntau tus neeg siv, hu uaONU(Optical Network Unit, kho qhov muag network unit).
Tus neeg siv hais txog ntawm no yog hais txog tus neeg siv uas tau them nqi ntawm nws tus kheej los ntawm tus neeg teb xov tooj, tsis yog tus naj npawb ntawm cov terminals siv. Piv txwv li, ONT ntawm FTTH feem ntau yog sib koom los ntawm ntau lub terminals hauv tsev, tab sis tsuas yog ib tus neeg siv tuaj yeem suav.
2. Hom ONTs
ONT yog qhov peb feem ntau hu ua optical modem, uas tau muab faib ua SFU (Single Family Unit, ib tsev neeg siv tsev), HGU (Home Gateway Unit, home gateway unit) thiab SBU (Single Business Unit, single business user unit).
2.1. SFU
SFU feem ntau muaj 1 txog 4 Ethernet interfaces, 1 txog 2 lub xov tooj ruaj khov, thiab qee cov qauv kuj muaj cable TV interfaces. SFU tsis muaj lub qhov rooj nkag hauv tsev, thiab tsuas yog lub davhlau ya nyob twg txuas nrog Ethernet chaw nres nkoj tuaj yeem hu mus rau hauv Is Taws Nem, thiab cov chaw taws teeb tswj kev ua haujlwm tsis muaj zog. Optical modem siv nyob rau theem pib ntawm FTTH belongs rau SFU, uas tsis tshua muaj siv tam sim no.
2.2. HGUs
Optical modems nruab nrog FTTH cov neeg siv tau qhib rau xyoo tas los no yog txhua yamHGU. Piv nrog SFU, HGU muaj qhov zoo hauv qab no:
(1) HGU yog lub rooj vag khoom siv, uas yooj yim rau kev sib txuas hauv tsev; thaum SFU yog lub pob tshab kis tau tus mob, uas tsis muaj lub rooj vag muaj peev xwm, thiab feem ntau xav tau kev koom tes ntawm cov khoom siv rooj vag xws li cov routers hauv tsev hauv kev sib txuas hauv tsev.
(2) HGU txhawb nqa txoj haujlwm thiab muaj NAT muaj nuj nqi, uas yog txheej-3 ntaus ntawv; thaum SFU hom tsuas yog txhawb nqa txheej-2 kev sib txuas, uas yog sib npaug rau txheej-2 hloov.
(3) HGU tuaj yeem siv nws tus kheej broadband dial-up daim ntawv thov, thiab cov khoos phis tawj txuas nrog thiab cov xov tooj ntawm tes tuaj yeem nkag ncaj qha rau hauv Is Taws Nem yam tsis muaj kev hu xov tooj; thaum SFU yuav tsum tau hu los ntawm tus neeg siv lub computer lossis xov tooj ntawm tes lossis los ntawm lub router hauv tsev.
(4) HGU yooj yim dua rau kev lag luam loj thiab kev tswj xyuas.
HGU feem ntau tuaj nrogWiFi thiab muaj USB chaw nres nkoj.
2.3. SBUs
SBU feem ntau yog siv rau FTTO cov neeg siv nkag, thiab feem ntau muaj Ethernet interface, thiab qee cov qauv muaj E1 interface, landline interface, lossis wifi muaj nuj nqi. Piv nrog SFU thiab HGU, SBU muaj kev tiv thaiv hluav taws xob zoo dua thiab ruaj khov dua, thiab kuj tseem siv rau sab nraum zoov xws li kev soj ntsuam video.
3. UASType ua
ONU muab faib uaMDU(Multi-Dwelling Unit, multi-resident unit) thiab MTU (Multi-Tenant Unit, multi-tenant unit).
MDU feem ntau yog siv rau kev nkag mus ntawm ntau tus neeg siv nyob hauv qab FTTB daim ntawv thov hom, thiab feem ntau muaj tsawg kawg yog 4 tus neeg siv-sab interfaces, feem ntau nrog 8, 16, 24 FE lossis FE + POTS (teev xov tooj ruaj khov) cuam tshuam.
MTU feem ntau yog siv rau kev nkag mus ntawm ntau lub tuam txhab cov neeg siv lossis ntau lub terminals hauv tib lub lag luam hauv FTTB qhov xwm txheej. Ntxiv rau Ethernet interface thiab cov xov tooj ruaj khov, nws kuj tseem muaj E1 interface; Cov duab thiab kev ua haujlwm ntawm MTU feem ntau tsis zoo ib yam li MDU. Qhov sib txawv, tab sis kev tiv thaiv hluav taws xob ua haujlwm zoo dua thiab kev ruaj ntseg siab dua. Nrog rau qhov nrov ntawm FTTO, daim ntawv thov scenarios ntawm MTU tau txais me me thiab me.
4. Cov ntsiab lus
Broadband optical fiber ntau nkag tau txais PON thev naus laus zis. Thaum cov ntaub ntawv tshwj xeeb ntawm cov khoom siv sab nraud tsis txawv, cov khoom siv sab nraud ntawm PON tuaj yeem raug hu ua ONU.
ONU, ONT, SFU, HGU…cov no khoom siv txhua tus piav qhia txog cov khoom siv sab nraud rau kev siv dav dav los ntawm cov ces kaum sib txawv, thiab kev sib raug zoo ntawm lawv yog qhia hauv daim duab hauv qab no.
Post lub sij hawm: Apr-21-2023