Kev paub

Raws li pom nyob rau hauv daim duab saum toj no, peb tuaj yeem nkag siab txog qhov tshwm sim ntawm RJ45 raws li daim duab, tab sis tsis yog txhua qhov RJ45 interfaces zoo li ib qho hauv daim duab saum toj no yog RJ11 interfaces, uas yuav tsis tham txog ib ntus.Cov keyboards tau teem ib sab nrog ntau RJ45 ports, uas ca ...

Feem ntau hais lus, kev sib raug zoo ntawm optical modules yog hais txog seb cov modules tuaj yeem ua haujlwm li cas ntawm cov khoom siv sib txuas lus ntawm ntau hom thiab cov tuam txhab.Cov ntsiab lus thev naus laus zis ntawm optical modules kuj tsawg, thiab lawv cov kev taw qhia kuj yooj yim.Raws li qhov tshwm sim, ntau t ...

los yog OSI siv qauv, qhov hloov ua haujlwm ntawm ob txheej ntawm cov qauv no, cov ntaub ntawv txuas txheej.Raws li pom hauv daim duab hauv qab no, qhov hloov pauv muaj yim qhov chaw nres nkoj.Thaum lub cuab yeej txuas rau hauv qhov hloov pauv los ntawm RJ45, tus hloov tus tswv nti yuav txheeb xyuas cov chaw nres nkoj ntsaws rau hauv lub network ...

PON module yog ib hom optical module.Nws ua haujlwm ntawm OLT cov khoom siv davhlau ya nyob twg thiab txuas nrog ONU cov cuab yeej ua haujlwm.Nws yog ib feem tseem ceeb ntawm PON network.PON optical modules tuaj yeem muab faib ua APON (ATM PON) optical modules, BPON (broadband passive network) optical modules, EPON (Ethernet ...

FHSS, zaus hopping kis spectrum technology, nyob rau hauv cov xwm txheej ntawm synchronization thiab simultaneity, lees txais cov teeb liab kis los ntawm nqaim-band nqa ntawm ib hom tshwj xeeb (daim ntawv tshwj xeeb no muaj qee zaus, thiab lwm yam) ntawm ob qhov kawg.Rau tus txais tsis muaj hom tshwj xeeb, lub hop ...

OFDM tau tshaj tawm hauv IEEE 802.11a.Raws li cov qauv kev hloov kho no, peb yuav tsum paub tias OFDM yog dab tsi kom nkag siab txog cov txheej txheem sib txawv.OFDM yog dab tsi?OFDM yog ib qho tshwj xeeb multi-carrier modulation technology.Qhov kev siv tshuab no tsom mus faib cov channel mus rau ntau qhov chaw orthogonal sub-channels, thiab ...