[Asterisk-Users] New $89 VOIP phone

[Marcelo Pacheco]

Sharing 2 100mbps ethernet with 1 Cat 5 cable, I do it left and right, I 
wouldn't recomend it on a cable over 200 ft(60 mts), I cabled the building 
where I live (family thing) where I have about 6 such cables all working 
fine.

On cable length, I heard there's people sucessfully using 900ft Ethernet 
cables, haven't seen one yet...

Marcelo

Em Qua 18 Ago 2004 13:13, robert.johnson-perkins at uk.nomura.com escreveu:
> > From: Chris Shaw
> >
> > > From: "Andrew Kohlsmith" <akohlsmith-asterisk at benshaw.com>
> > >
> > > 2 ethernet connections by using all 4 pairs of the cable.
> > > Put one at your desk, and one at your switch, et voila; 2 independent
> > > ethernet connections over one cable.
> > >
> > > You could also do this without those splitters by splitting
> >
> > 2 pairs of wires to 2 connectors on both side of the cable.
> >
> > You're kidding right?
> >
> > There's a reason why category 5 cable is twisted the way it is... to
> > eliminate or greatly reduce RF crosstalk on the wires... Now
> > what would
> > happen if you split those wires between 2 different signals
> > and kept them
> > tightly packed together?
> >
> > Can we say random data corruption, mysterious errors and terrible
> > performance? Bingo!
> >
> > Again, this kind of thing might be ok for a small home
> > network, but you
> > can't seriously suggest it for a business...
>
> As long as you wire them up correctly, will not be a problem:
>
> I wire them as
>  RJ45 socket 1: pins 1&2 (TX+/-) to orange pair, pins 3&6 (RX+/-) green
> pair RJ45 socket 2: pins 1&2 (TX+/-) to brown pair, pins 3&6 (RX+/-) blue
> pair
>
> The fact that the signals run down a twisted pair REDUCES cross talk, which
> is why the cables CAN be unshielded. Think about it, the only thing
> separating two cables is the grey plastic! and they don't crosstalk.
>
> Seems, kind-of, environmentally unfriendly leaving all of those pairs left
> unused.....
>
> Anyway, belkin et all sell the cable economizers so it must be fine ;-)
>
>
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