Mafunso Ofunsidwa Kawirikawiri

Mitengo yathu idzakhala yabwino komanso yopikisana chifukwa cha mphamvu zathu zopangira, ngakhale mitengoyo ikusintha kutengera kupezeka ndi zinthu zina pamsika. Tidzakutumizirani mndandanda wamitengo wosinthidwa kampani yanu ikalumikizana nafe kuti mudziwe zambiri.

Ayi ndithu. Tidzapereka mtengo kutengera kuchuluka kwanu. Mukayitanitsa zambiri, mtengo wake udzakhala wabwino. Ndipo ngati mukufuna zitsanzo zaulere, chonde titumizireni imelo.

Inde, inde. Tikhoza kukupatsani zikalata zokhudzana nazo, monga Zikalata Zokhudza Kusanthula / Kutsatira; Inshuwalansi; Chiyambi, ndi zikalata zina zotumizira kunja.

Malinga ndi kuchuluka kwanu ndi chitsanzo chanu mwatsatanetsatane, tidzakupatsani nthawi yoyenera yoperekera chithandizo. Monga mwachizolowezi, pa zitsanzo, nthawi yoperekera chithandizo ndi pafupifupi masiku 7. Pakupanga zinthu zambiri, nthawi yoperekera chithandizo ndi masiku 20-30 mutalandira ndalama zolipirira. Tidziwitseni kwaulere ngati muli ndi zofunikira zina zapadera.

Mukhoza kulipira ku akaunti yathu ya banki, Western Union kapena PayPal:
30% ya ndalama zomwe mwasungitsa pasadakhale, 70% ya ndalama zomwe mwasungitsa pa kopi ya B/L.

Timapereka chitsimikizo cha zipangizo zathu ndi luso lathu. Kudzipereka kwathu ndikukwaniritsa zomwe mukufuna ndi zinthu zathu. Kaya chitsimikizo chili chotani, ndi chikhalidwe cha kampani yathu kuthetsa mavuto onse a makasitomala kuti aliyense akhutire.

Inde, nthawi zonse timagwiritsa ntchito ma CD apamwamba kwambiri otumizira kunja. Timagwiritsanso ntchito ma CD apadera oika zinthu zoopsa komanso otumiza zinthu zozizira zovomerezeka pazinthu zomwe zimakhudzidwa ndi kutentha. Ma CD apadera komanso zofunikira zoyika zinthu zomwe sizili zokhazikika zitha kubweretsa ndalama zina zowonjezera.

Mtengo wotumizira umadalira njira yomwe mwasankha yopezera katundu. Nthawi zambiri njira yachangu kwambiri komanso yokwera mtengo kwambiri. Kutumiza katundu panyanja ndiyo njira yabwino kwambiri yopezera katundu wambiri. Mitengo yotumizira katundu tingakupatseni pokhapokha ngati tikudziwa zambiri za kuchuluka kwake, kulemera kwake, ndi njira yake. Chonde titumizireni uthenga kuti mudziwe zambiri.

Ndipotu, kusiyana pakati pa OM3 ndi OM4 fiber kuli kokha pakupanga chingwe cha kuwala cha ulusi. Kusiyana kwa kapangidwe kake kumatanthauza kuti chingwe cha OM4 chili ndi kuchepa kwabwino ndipo chimagwira ntchito pa bandwidth yayikulu kuposa OM3. Chifukwa chiyani izi zimachitika? Kuti ulalo wa ulusi ugwire ntchito, kuwala kochokera ku VCSEL transceiver kumakhala ndi mphamvu zokwanira kufikira wolandila kumapeto ena. Pali magwiridwe antchito awiri omwe angalepheretse izi - kuchepa kwa kuwala ndi kufalikira kwa modal.

Kuchepa kwa mphamvu ya chizindikiro cha kuwala pamene chikufalikira (dB). Kuchepa kwa mphamvu kumachitika chifukwa cha kutayika kwa kuwala kudzera mu zinthu zosagwira ntchito, monga zingwe, ma waya, ndi zolumikizira. Monga tafotokozera pamwambapa, zolumikizira ndizofanana kotero kusiyana kwa magwiridwe antchito mu OM3 vs OM4 kuli mu kutayika (dB) mu chingwe. Ulusi wa OM4 umayambitsa kutayika kochepa chifukwa cha kapangidwe kake. Kuchepa kwakukulu komwe kumaloledwa ndi miyezo kukuwonetsedwa pansipa. Mutha kuwona kuti kugwiritsa ntchito OM4 kukupatsani kutayika kochepa pa mita imodzi ya chingwe. Kutayika kochepa kumatanthauza kuti mutha kukhala ndi maulalo ataliatali kapena kukhala ndi zolumikizira zambiri zogwirizana mu ulalo.

Kuchepetsa kwakukulu komwe kumaloledwa pa 850nm: OM3<3.5 dB/Km; OM4<3.0 dB/Km

Kuwala kumafalikira m'njira zosiyanasiyana motsatira ulusi. Chifukwa cha zolakwika zomwe zili mu ulusi, njirazi zimafika nthawi zosiyana pang'ono. Pamene kusiyana kumeneku kukuwonjezeka pamapeto pake mumafika pamalo pomwe chidziwitso chomwe chikutumizidwa sichingathe kufotokozedwa. Kusiyana kumeneku pakati pa njira zapamwamba ndi zochepa kumadziwika kuti modal dispersion. Modal dispersion imatsimikizira modal bandwidth yomwe ulusi ungagwire ntchito ndipo uku ndiye kusiyana pakati pa OM3 ndi OM4. Modal dispersion ikatsika, modal bandwidth imakhala yayikulu komanso kuchuluka kwa chidziwitso chomwe chingatumizidwe. Modal bandwidth ya OM3 ndi OM4 ikuwonetsedwa pansipa. Bandwidth yayikulu yomwe ilipo mu OM4 imatanthauza modal dispersion yaying'ono motero imalola ma chingwe kukhala ataliatali kapena imalola kutayika kwakukulu kudzera mu zolumikizira zambiri. Izi zimapereka zosankha zambiri poyang'ana kapangidwe ka netiweki.

Bandwidth Yocheperako ya Chingwe cha Ulusi pa 850nm: OM3 2000 MHz·km; OM4 4700 MHz·km

Mungathe kutidziwitsa mwachangu za momwe zinthuzi zidzagwiritsidwire ntchito, ndipo mungakonde kudziwa zambiri monga chinyezi, kutentha, ndi zinthu za m'chilengedwe. Tikhoza kupereka zinthu zopangidwa ndi chingwe/ulusi wopangidwa mwaluso komanso mitengo kuti zigwirizane ndi zosowa zanu. Palinso zosankha za zinthu zomwe mwasankha.