Ethernet kalvdia (asxeto me linux)

[Hammer]

George Fourlanos wrote in message ...
>
>Antimetvpizo to ejeis problima exv agorasei ena intel switch (8 port)
10/100
>mi diaxeirisimo

em... Den phres CISCO... eipame to ka8e monopoleio sthn kathgoria toy ;-)

>i megalyteri apostasi pou exv einai 40 m exv agorasei kai utp kalvdio cat 5
>40m kai envsa
>ena pc me mia intel pro 10/100 pano sto switch (me RJ-45) to apotelesma
>itane na anabosbini
>ena portokali lampaki sto switch (otan paizei sta 100 i porta anabi ena
>portokali lampaki),
>kai na min anabei katholou to lampaki tis ethernet

Profanws yparxei problhma...

>syndeo allo pc me 10Mb ethernet pano sto switch kai mou deixnei oti paizei
>kanonika ,
Ara to switch sta 10Mb ta 40m... OK

> me to idio kalvdio
A... kai me to idio kalodio (kati arxizei na mou bromaei)

>(den prolaba na kano kapoia tests gia na do poso argo itane alla edeixne na
>douleuei to diktio, me ping)
>syndeo tvra to pc me tin 10/100 Mb ethernet pano se ena hub (3com)  8port
>sta 10Mb kai edeixne pali na douleuei kanonika,
E! Kala to 8ema einai na dwkimazes me 100Mbit Hub, sta 10 epaize kai me to
switch
Entajy.. entajy eipame oi kartes douleyoun!

>entvmetajy exv dokimasi kai diaforetiko kalvdio , pali
>utp cat 5 gyro sta 40 metra kai afto.

Pou to brhkes? Apo ton idio promh8eyth? Mipws den jerei na syndeei swsta ta
kalodia kai gia ayto paizei mono sta 10Mbit?

>
>Ti akribvs kano lathos ?, xreiazomai allo kalvdio ? to utp cat 5 den paizei
>sta 100 Mb pano apo 10 metra ?
Twra Sygoureytika!

>ftaei to switch ??

oxi. Ma afou esy to egrapses sta 100Mbit douleyei... (estw kai se liga
metra) Ara fteei to kalwdio.

>
>Eyxaristo ek tvn protervn
>


Egw den jerw oute ti 8a pei "utp cat 5" oute "ftp" oute "futp" an 8elei
kapoios as mou ejyghsei tis diafores...
Mporw na pw omws ta ejhs:
To kalodio UTP apoteleitai apo 4 zeygh systramenwn syrmatwn. estw me xrwmata
A,B,C,D. Ara loipon exoume ta ejeis 8 syrmata: A1,A2,B1,B2,C1,C2,D1,D2. Opou
X1,X2 einai systarmeno zeygos kai exei to idio xrwma X. Einai shmantiko ka8e
ena kanali epikoinwnias na xrhsimopoiei syrmata apo TO IDIO zeygos
systramenwn syrmatwn. Etsi to send prepei na xreishmopoiei 1 zeygos kai to
receive ena (1) allo. Alloiws ti nohma exei na mhlame gia Twisted pair?
H parapanw syn8ykh einai polh elastikh sthn taxythta twn 10Mbit. Etsi sta
10Mbit oi syndesh twn kalwdiwn stous akrodektes tou UTP den paizei kai
megalo rolo. Gia to logo ayto me opoia seira kai na mpoun ta sirmata, to
kalodio telika PAIZEI, estw kai me meiwmenh taxythta (gia ayto to logo to
kalodio sou paizei sta 10Mbit) Etsi polloi xreishmopoioun ton parakatw tropo
syndeshs twn "klip" RJ-45 stis akres tou UTP:

A1,A2,B1,B2,C1,C2,D1,D2

O Opoios einai LA8OS gia thn taxythta twn 100Mbit! Dioti etsi ta kanalia
pernoun apo diaforetika Twisted Pair!!! kai ara DEN exoume Twisted Pair. Ti
na thn kanoume loipon th 8wrakish pou parexei to futp ean den
ekmetaleyomaste oute thn systrofh pou mas dinou oi kataskeyastes tou UTP?

H swsth diatajh twn kalodiwn einai:
A1,A2,B1,C1,C2,B2,D1,D2
Anejarthtws xrwmatos (balte opoio 8elete sth mesh, arkei na einai to idio
kai apo tis 2 meries)

Einai logiko loipon ta kalodia sou na paizoun sta 10 metra (dioti sta 10
metra einai outo h allws mikres oi paremboles) kai den paizoun sta 40 kai
panw...

File MHN AGORAZEIS ALLA KALODIA !!! Tosos kosmos douleyei me ta apla UTP,
giati dhladh esy eidika na eisai anagasmenos na pareis ta "eidika" futp???
Pare ta palia sou pou einai 40 metra (milame gia efteles mhkos) kai pigene,
oxi na ta foreseis kapelo se ayton pou sou ta eftiaje, alla na tou peis na
sou kopsei tous akrodektes kai na balei kainourious me ti swsth diatajh twn
kalwdiwn...

Eyxaristw kai Kalon Aiwna na exoume!!!

Nikolas (Hammer)



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