Isishwankathelo kunye nezisombululo zeengxaki eziqhelekileyo kwi-fiber optic transceivers
Zininzi iintlobo ze-fiber transceivers, kodwa indlela yokuxilongwa kwempazamo iyafana.Ukushwankathela, iimpazamo ezenzeka kwi-fiber transceiver zezi zilandelayo:
1.Isibane samandla sicimile, ukusilela kwamandla;
2.Ukukhanya kwekhonkco akukhanyisi.Impazamo ingaba ngolu hlobo lulandelayo:
a.Khangela ukuba umgca wefiber uvuliwe
b.Jonga ukuba umgca wefiber mkhulu kakhulu kwaye uyagqitha kuluhlu olufunyenweyo lwesixhobo.
c.Jonga ukuba ujongano lwefayibha luqhagamshelwe ngokufanelekileyo.I-TX yendawo iqhagamshelwe kwi-RX ekude, kwaye i-TX ekude ixhunyiwe kwi-RX yendawo.
d.Jonga ukuba isinxibelelanisi sefayibha sifakwe ngokufanelekileyo kujongano lwesixhobo, ingaba udidi lokutsiba luyahambelana nojongano lwesixhobo, ingaba udidi lwesixhobo luyahambelana nosinga, nokuba ubude bothumelo besixhobo buhambelana nomgama.
3.Isibane soLungelelaniso sesekethe asikhanyiswanga.Impazamo ingaba ngolu hlobo lulandelayo:
a.Khangela ukuba intambo yenethiwekhi ivuliwe;
b.Khangela ukuba uhlobo loqhagamshelwano luyahambelana na: izixhobo ezifana namakhadi enethiwekhi kunye neerotha zisebenzisa iingcingo ezinqamlezayo, iiswitshi, ii-hubs, njl., zisebenzisa imigca eqondileyo;
c.Jonga ukuba isantya sothumelo lwesixhobo siyahambelana na;
4.Ilahleko yepakethe yenethiwekhi iyingozi kakhulu, kwaye impazamo inokuba ngolu hlobo lulandelayo:
a.I-port yombane ye-transceiver ixhunyiwe kwisixhobo sothungelwano, okanye imodi ye-duplex ye-interface yezixhobo ezibini ayihambelani.
b.Isibini esijijekileyo kunye nentloko ye-RJ-45 ineengxaki, khangela
c.Ingxaki yoxhulumaniso lweFayibha, nokuba i-jumper ihambelana nojongano lwesixhobo, nokuba i-pigtail ihambelana ne-jumper kunye nohlobo lwe-coupler.
I-5.I-fiber transceivers ayikwazi ukunxibelelana emva kokuba iziphelo zombini zixhunyiwe.
a.I-fiber iguqulwa, kwaye i-fiber exhunywe kwi-TX kunye ne-RX iguqulwa.
b.I-interface ye-RJ45 ayidityaniswanga ngokufanelekileyo kwisixhobo sangaphandle (qaphela ngokuthe ngqo kunye ne-spliced)
I-fiber interface (i-ceramic ferrule) ayihambelani.Eli phutha libonakaliswa ngokukodwa kwi-transceiver ye-100M kunye nomsebenzi wokulawula umbane we-photoelectric.Ukuba i-pigtail ye-APC ferrule ixhunyiwe kwi-transceiver ye-PC ferrule, ayiyi kukwazi ukunxibelelana ngokuqhelekileyo.I-transceiver ye-photoelectric intercommunication ayinayo umphumo.
6.Isiganeko sokuchitha ixesha
a.Isenokuba kukucutha kakhulu kwendlela yamehlo.Ngeli xesha, amandla okukhanya okuphela kokufumana anokulinganiswa imitha yamandla optical.Ukuba ikufuphi noluhlu olufumanayo lovakalelo, inokugwetywa ngokusisiseko njengokungaphumeleli kwendlela yokubona ngaphakathi koluhlu lwe-1-2dB.
b.Iswitshi eqhagamshelwe kwi-transceiver inokuba nempazamo.Kule meko, utshintsho lutshintshwa yi-PC, oko kukuthi, ii-transceivers ezimbini zixhunywe ngokuthe ngqo kwi-PC, kwaye iziphelo ezimbini zixhunyiwe kwi-PING.Ukuba umtshini awuphumeleli, umtshintshi unokumiselwa ngokusisiseko ukuba yimpazamo yokutshintsha.
c.Isenokuba kukungaphumeleli kwe-transceiver.Kule meko, qhagamshela i-transceiver kwi-PC kuzo zombini iziphelo (kungekhona ngokutshintsha).Emva kokuba zombini iziphelo zingenayo ingxaki nge-PING, dlulisela ifayile enkulu (100M) ukusuka kwelinye icala ukuya kwelinye icala, kwaye ugcine isantya sayo.Ukuba isantya sicotha kakhulu (iifayile ezingaphantsi kwe-200M zihanjiswa ngaphezu kwemizuzu eyi-15), i-transceiver inokugwetywa ngokusisiseko njengephutha.
d.Emva kwexesha lokunxibelelana, ikhompyutha iphazamiseka, oko kukuthi, ayikwazi ukunxibelelana, kwaye ibuyela ngokuqhelekileyo emva kokuqalisa kwakhona.
Le nto ibangelwa ngokubanzi kukutshintsha.Umtshintshi wenza ubhaqo lwemposiso ye-CRC kunye nokujonga ubude kuyo yonke idatha efunyenweyo.Ihlola ukuba ipakethe enephutha iya kulahlwa kwaye ipakethe echanekileyo iya kuthunyelwa.Nangona kunjalo, ezinye iipakethe ezineempazamo kule nkqubo azibonakali kwi-CRC yokufumanisa impazamo kunye nokukhangela ubude.Iipakethi ezinjalo aziyi kuthunyelwa ngexesha lenkqubo yokuthunyelwa kwaye aziyi kulahla.Ziya kuqokelelwa kwi-cache eguqukayo.(Isithinteli), ayinakuze ithunyelwe ngaphandle, linda de isithinteli sigcwale, iya kubangela ukuba utshintsho luphazamiseke.Kuba ukuqalisa kwakhona i-transceiver okanye ukuqalisa kwakhona iswitshi ngeli xesha kunokubuyisela unxibelelwano kwimeko yesiqhelo, umsebenzisi udla ngokucinga ukuba ingxaki kwi-transceiver.
7.Indlela yokuvavanya i-Transceiver
Ukuba ufumanisa ukuba kukho ingxaki ngoqhagamshelwano lwe-transceiver, nceda uluvavanye ngolu hlobo lulandelayo ukuze ufumane unobangela wokusilela.
a.Uvavanyo olusondeleyo:
Zombini iziphelo zekhompyuter ukuya kwi-PING, ukuba unako i-PING通, emva koko ubonise ukuba i-fiber transceiver ayikho ingxaki.Ukuba uvavanyo olusondeleyo alukwazi ukunxibelelana, kunokugwetywa ukuba i-transceiver optical iphosakele.
b.Uvavanyo olukude:
Ukuba ikhomputha kwiziphelo zombini ayixhunyiwe kwi-PING, ukuba i-PING ayifikeleleki, kufuneka ihlolisise ukuba uxhulumaniso lwendlela ye-optical luyinto eqhelekileyo kwaye ingaba amandla okudlulisa kunye nokufumana i-transceiver optical ngaphakathi koluhlu oluvumelekileyo.Ukuba i-PING idlulisiwe, ibonisa ukuba indlela ye-optical ixhunyiwe ngokuqhelekileyo.Unokugqiba ukuba ingxaki ikwiswitshi.
c.Uvavanyo olukude ukumisela indawo yokusilela:
Okokuqala qhagamshela isiphelo esinye kwisitshintshi, kwaye zombini ziphela kwi-PING.Ukuba akukho siphoso, sinokugwetywa njengokusilela kwesinye iswitshi.
Iingxaki ezixhaphakileyo zisonjululwa ngumbuzo nempendulo
Ngokogcino lwemihla ngemihla kunye neengxaki zabasebenzisi, ezishwankathelweyo kwaye zicaciswe ngendlela yombuzo kunye nempendulo, ngethemba lokuzisa uncedo kubasebenzi bezolondolozo, ukufumanisa unobangela ngokwemeko yempazamo, ukufumana iphoso, “iyeza elichanekileyo. .”
I-1.Q: Luluphi uhlobo loxhumo olusetyenziswayo xa i-transceiver RJ45 port ixhunyiwe kwezinye izixhobo?
A: I-port ye-RJ45 ye-transceiver ixhunywe kwikhadi lenethiwekhi ye-PC (i-DTE data data terminal) usebenzisa i-crossover twisted pair, kunye ne-HUB okanye i-SWITCH (izixhobo zonxibelelwano lwedatha ye-DCE) isebenzisa i-parallel twisted pair.
I-2.Q: Yintoni isizathu sokuba ukukhanya kwe-TxLink kungakhanyiswa?
Impendulo: (1).Isibini esijijekileyo sidityanisiwe;
(2).Intloko yekristale ephothiweyo inonxibelelwano olubi kunye nesixhobo, okanye umgangatho wesibini esijijekileyo ngokwawo;
(3).Isixhobo asiqhagamshelwanga ngokufanelekileyo.
3.Q: Yintoni isizathu sokuba isibane se-TxLink singakhanyisi kodwa sihlala sihlala emva kokuba i-fiber ixhunywe ngokufanelekileyo?
Impendulo: 1.Impazamo idla ngokubangelwa ngumgama wothumelo omde kakhulu.
2. Ingxaki yokuhambelana nekhadi lenethiwekhi (elidityaniswe nePC).
I-4.Q: Sisiphi isizathu sokuba ukukhanya kweFxLink kungakhanyiswa?
Intambo ye-fiber optic ixhunyiwe ngokungalunganga, kwaye indlela yokudibanisa echanekileyo yi-TX-RX, i-RX-TX, okanye imodi yefiber ayilungile;
Umgama wothumelo mde kakhulu okanye ilahleko ephakathi inkulu kakhulu, idlula ilahleko engeyiyo yemveliso.Isisombululo kukuthatha amanyathelo okunciphisa ilahleko ephakathi okanye indawo yayo kunye ne-transceiver kunye nomgama omde wokudluliselwa.
Iqondo lobushushu elisebenzayo lefiber optic liphezulu kakhulu.
I-5.Q: Yintoni isizathu sokuba ukukhanya kweFxLink kungabonakali kodwa ukukhanya kuhlala kukhanya emva kokuba i-fiber ixhunyiwe ngokufanelekileyo?
A: Impazamo idla ngokubangelwa ngumgama wothumelo ube mde kakhulu okanye ilahleko ephakathi inkulu kakhulu, igqitha ilahleko engeyiyo yemveliso.Isisombululo kukunciphisa ilahleko ephakathi okanye endaweni yayo kunye ne-transceiver kunye nomgama wothumelo olude.
I-6.Q: Yintoni endimele ndiyenze ukuba izibane ezihlanu zonke zikhanyisa okanye isalathisi siqhelekileyo kodwa singadluliswa?
A: Ngokubanzi, umbane ucinyiwe kwaye uqaliswe kwakhona.
I-7.Q: Yintoni ubushushu be-ambient ye-transceiver?
Impendulo: Imodyuli ye-fiber optic ichaphazeleka kakhulu kubushushu be-ambient.Nangona inokwakhelwe kwisekethe yokuzuza ngokuzenzekelayo, emva kokuba izinga lokushisa lidlula uluhlu oluthile, amandla optical wemodyuli ye-optical iyachaphazeleka kwaye iyancipha, eyenza buthathaka umgangatho wesignali ye-optical network kwaye ibangele ukulahlekelwa kwepakethi.Izinga liyenyuka kwaye lide likhuphe ikhonkco le-optical;(iimodyuli eziqhelekileyo zefiber optic zinokusebenza kumaqondo obushushu ukuya kuthi ga kwi-70° C).
8.Q: Yintoni ukuhambelana neprotocol yesixhobo sangaphandle?
A: Njengokutshintsha kwe-10 / 100M, i-10 / 100M i-transceiver ebonakalayo inomda othile kubude besakhelo, ngokuqhelekileyo akukho ngaphezu kwe-1522B okanye i-1536B.Xa iswitshi eqhagamshelwe kwiofisi ephakathi ixhasa ezinye iiprothokholi ezikhethekileyo (ezifana ne-Cisco's ISL) Ipakethe engaphezulu iyanda (ixabiso lepakethe ye-ISL yeCisco yi-30 Bytes), edlula umda ophezulu wobude besakhelo se-fiber transceiver kwaye ilahlwe.Oku kubonisa ukuba izinga lokulahlekelwa kwepakethi liphezulu okanye cha.Kule meko, i-MTU yesixhobo se-terminal kufuneka ilungiswe.Iyunithi yokuthumela ephezulu, i-overhead ye-IP jikelele ipakethe yi-18 bytes, kunye ne-MTU yi-bytes ye-1500. Ngoku abavelisi bezixhobo zonxibelelwano eziphezulu zineeprotocol zangaphakathi zenethiwekhi, ngokuqhelekileyo bamkele ipakethe eyahlukileyo, eya kwandisa i-IP.Ukuba idatha i-1500 bytes, ubukhulu bepakethe ye-IP buya kuba ngaphezu kwe-18 emva kokuba ipakethe ye-IP ilahlwe.Ubungakanani bepakethi buyonelisa umda wesixhobo sothungelwano kubude besakhelo.Ipakethi ye-1522 byte yongezwa kwithegi yeVLAN.
9.Q: Emva kokuba i-chassis isebenze ngokuqhelekileyo ixesha elithile, kutheni ukuba amanye amakhadi angasebenzi kakuhle?
A: Unikezelo lwamandla lwe-chassis kwangoko lusebenzisa imowudi yokudlulisa.Ukungonelanga komda wonikezelo lwamandla kunye nelahleko yentambo enkulu ziingxaki ezinkulu.
Emva kokuba i-chassis isebenza ngokwesiqhelo kangangexesha elithile, amanye amakhadi asenokungasebenzi kakuhle.Xa amanye amakhadi ekhutshiwe, amakhadi aseleyo asebenza ngokwesiqhelo.Emva kokusebenza kwexesha elide le-chassis, i-oxidation yokudibanisa ibangela ilahleko enkulu edibeneyo.Olu nikezelo lwamandla luwela ngaphaya kwemimiselo.Uluhlu olufunekayo lunokubangela ukuba ikhadi le-chassis libe yinto engavamile.Ukutshintshwa kombane wombane we-chassis ukhuselwe yi-high-power Schottky diode ukuphucula ifom ye-connector kunye nokunciphisa ukuhla kwamandla okubangelwa yi-circuit control kunye ne-connector.Kwangaxeshanye, ukuncipha kwamandla ombane kuyanda, nto leyo eyenza ukuba unikezelo lwamandla olugciniweyo lube lula kwaye lukhuseleke, kwaye luyenze lufaneleke ngakumbi umsebenzi ongaphazamisekiyo wexesha elide.
I-10.Q: Yintoni umsebenzi we-alamu yekhonkco enikezelwe kwi-transceiver?
A: I-transceiver inomsebenzi we-alarm yekhonkco (linkloss).Xa i-fiber ethile iwa, iya kuphinda ibuyele kwi-port yombane (oko kukuthi, isalathisi kwi-port yombane nayo iya kucinywa). tshintsha.