David
100BaseT4 uses a standard RJ-45 connector with the same pinout as the
10BaseT specification, plus two bidirectional pairs (transmit on 1 and 2,
receive on 3 and 6; bidirectional on 4 and 5; bidirectional on 7 and 8).
Ajaz
""David L. Blair"" <> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Future Needs. You are right that 10BaseT and 100BaseT do not use more
than
> 4 wires, but 100VGLAN and 100Base4 do. Those specifications used the
extra
> wires to transmit data at a slower speed. When you add up the additional
> data lines multiple, 4, by the slower speed, 25Mb, you get 100Mb
> transmission rate.
>
> FYI: 100Base4 was designed to run 100Mb over Cat 3 wiring.
>
> -dlb
>
> ----- Original Message -----
> From: ""CCIE TB"" <[EMAIL PROTECTED]>
> Newsgroups: groupstudy.cisco
> Sent: Monday, September 18, 2000 10:39 PM
> Subject: Why 8 wires in RJ-45?
>
>
> > Hi group members
> >
> > In TP cables we have eight wires. Only four are used. Why we need the
> other
> > four. The same thing applies to DB-25 and other types of cables. We
don't
> > use all of the wires. Why?
> >
> > Regards to all
> >
> >
> >
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