La macandelo alandelayo anika uhlalutyo olucacileyo lweengxaki eziqhelekileyo kuvavanyo lwefayibha.
(1) Kutheni uvavanyo lwefayibha ludlula kodwa ipakethi isalahlekile ngexesha lomsebenzi womnatha?
Ekukhetheni umgangatho, abaninzi abasebenzisi baya kwenza iimpazamo ezicacileyo, ezifana nokunikela ingqalelo encinci ukuba i-fiber evavanyiweyo yi-50μm okanye i-62.5μm.
Iimfuno zexabiso eliphezulu lelahleko lemicu emibini yokuvula i-aperture inkulu.Ukukhethwa okungalunganga komgangatho wovavanyo lwentambo ye-optical kuya kukhokelela ngokuthe ngqo ekutshintsheni umda wokumisela.Umzekelo, ukuba ikhonkco elilinganisiweyo langempela liyi-50μm fiber, kwaye umgangatho wokuvavanya okhethiweyo ngu-62.5μm, kwaye isicelo ngu-100Base-FX, ucinga ukuba umphumo wokuvavanya ngu-10dB, umhloli uya kufumana umphumo we-PASS, kwaye imeko yokwenyani kufuneka ibe ayinakufaneleka Ngenxa yokuba idlula umda wesigqibo we-6.3dB.
Oku kuphendula umbuzo wangaphambili, kwaye uvavanyo luphumelele, kodwa kutheni idatha isaya kulahlekelwa iipakethi.
(2) Kutheni izinga le-10 leGigabit lingekaxhaswa xa lidlula umgangatho we-10 Gigabit?
Kukho abasebenzisi abanjalo abaphucula umqolo wenethiwekhi.Baya kuphucula iimodyuli zokutshintsha kunye nomncedisi.Ewe kunjalo, baya kuvavanya kwakhona ilahleko yefiber kwinethiwekhi.Kubonakala ngathi akukho ngxaki kwindlela.Ifiber iye yavavanywa ukuhlangabezana neemfuno zenethiwekhi ye-Gigabit ye-10., Ilahleko ingaphantsi komda osemgangathweni, kodwa umphumo wokoqobo wokusebenza awukafaneli.
Isizathu sokuhlalutya ubukhulu becala kukuba i-mode bandwidth ye-fiber optic cable ayiqwalaselwa.I-bandwidth yemowudi yeentambo ezahlukeneyo zefiber optic imele i-bandwidth ephezulu enokunikezelwa kumgama othile.Ubukhulu be-bandwidth yemowudi, isantya esikhulu sothumelo phakathi komgama othile.Ngokuqhelekileyo, i-bandwidth yemowudi iphantsi, ingaphantsi kwe-160. Ngenxa yoko, isantya asinakunyuswa njengoko umgama ude, nangona ilahleko iyamkeleka ngeli xesha.
(3) Ukulahleka kovavanyo kusemgangathweni, kwaye akukho ngxaki kunye ne-bandwidth yemodi.Kutheni kukho nayiphi na ingxaki ekusebenzeni ngokwenene?
Sisenokungaqondi kuvavanyo.Ngethuba nje ilahleko idlula, i-fiber ithathwa njengelungile, kodwa oku akunjalo.Ukucinga ukuba imeko enjalo, ukuyila okusemgangathweni kufuna ukuba ilahleko yekhonkco ibe yi-2.6dB.Ukulahlekelwa kwentloko ye-adapter ingaphezulu kwe-0.75dB, kodwa ilahleko yekhonkco iyonke ingaphantsi kwe-2.6dB.Ngeli xesha, ukuba uvavanya nje ilahleko, usenokungayifumani ingxaki yeadaptha, kodwa kusetyenziso lwenethiwekhi yokwenyani, kuya kuba ngenxa yengxaki yeadaptha.Ngenxa yoko, izinga lempazamo yebit yothumelo lonyuswa kakhulu.