New standards? It can cause problems with standards that are
already there:
http://www.faqs.org/faqs/LANs/cabling-faq/
With reference to T568B above;
ATM 155Mbps uses pairs 2 and 4 (pins 1-2, 7-8)
Ethernet 10Base-T uses pairs 2 and 3 (pins 1-2, 3-6)
Ethernet 100Base-T4 uses pairs 2 and 3 (4T+) (pins 1-2, 3-6)
Ethernet 100Base-T8 uses pairs 1,2,3 and 4 (pins 4-5, 1-2, 3-6, 7-8)
Token-Ring uses pairs 1 and 3 (pins 4-5, 3-6)
TP-PMD uses pairs 2 and 4 (pins 1-2, 7-8)
100VG-AnyLAN uses pairs 1,2,3 and 4 (pins 4-5, 1-2, 3-6, 7-8)
If all you're doing is 10Base-T, or 100Base-T4, then wiring it
that way won't cause you any troubles. It's a good idea to make your
cables as universal as possible in case your company, or the company that
buys your building after you're gone, changes to something different.
Jason
At 09:32 AM 11/08/01 -0600, you wrote:
>You may run into trouble using these cables in the future as new standards
>emerge.
>
>Regards, Dustin
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> > Behalf Of Byron Como
> > Sent: Thursday, November 08, 2001 9:13 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: [brluglist] homemade CAT 5
> >
> >
> > Scott Harney wrote:
> >
> > >
> > >Since ethernet only travels over positions 1,2,3 & 6 in the cable you
> > >can see that this will result in a proper crossover.
> > >
> > Actually, I am in the habit of only connecting 1,2,3 & 6 and have had
> > good results. Anybody think of a reason why this is a bad practice?
> >
> > Byron
> >
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