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kobik
Joined: 24 Sep 2002
Posts: 63
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 22 Dec 2002 16:22 Unesed pin in Ethernet RJ45? |
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why there unesed pin in the Ethernet
RJ45 connector (pin:4,5,7, and what
i need to do with them?
TIA 
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kobik
Joined: 24 Sep 2002
Posts: 63
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| 22 Dec 2002 16:26 |
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| sory, Unesed = Unused
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kot_b
Joined: 28 Dec 2001
Posts: 111
Helped: 3
Location: Latvia
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| 22 Dec 2002 17:05 |
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| Hmmm, it seems, that this pins are connected to ground, if application doesn't accepct MDI or MDI-X powering interface.
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dainis
Joined: 15 May 2001
Posts: 1453
Helped: 56
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| 22 Dec 2002 19:56 |
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| One way use this termination recomended from Intel:
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Davis
Joined: 25 Jul 2002
Posts: 29
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| 23 Dec 2002 3:15 |
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| Does anyone know where I can get a hub or switch providing MDI or MDI-X powering interface? Thanks a lot!
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FFFFFF
Joined: 22 Jul 2002
Posts: 1007
Helped: 3
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| 23 Dec 2002 5:04 |
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...
i have HP 100 VG network card use the 8 wires
that is for a special 100 mbits mode
6 * F
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Elvis P.
Joined: 28 Aug 2001
Posts: 31
Location: Europe
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| 09 Jan 2003 17:00 |
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in 100BaseTX applications there are only used 4 pins (symm TxD, symm RxD) the other ones are just connected one to one in the connector and are used in so called structured wiring. (e.g. if you are cabling a company you just need one type of cable and use i for ethernet, telephone, isdn, and other communication devices)
In Cat.6 ot higher all pins are used due to the higher bandwith but with the exact same pinning. this is extremely useful when changing the IT you are able to use the same wiring.
regards
Elvis P.
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