Gigabit ethernet cable?

[Rob]

I'm directly connecting two PC's each with Intel Pro Gigabit NIC's. Do I
still need to use crossover cables, or can I use straight-through. Also,
will Cat 5e cable enable maximum performance from these cards?

[daytripper]

On Fri, 2 Jan 2004 00:29:47 -0600, "Rob" <rob@hotpop.com> wrote:
I'm directly connecting two PC's each with Intel Pro Gigabit NIC's. Do Istill need to use crossover cables, or can I use straight-through. Also,will Cat 5e cable enable maximum performance from these cards?

Cross-over cat5e will be fine...

[dg]

I have never used gigabit, but I know it uses all 8 wires so I would guess
straight through would be the way to go. On the other hand, most devices
seem to be smart these days-figuring out if a cable is crossed or standard
automatically.

--Dan

"daytripper" <day_trippr@REMOVEyahoo.com> wrote in message
news:9debvv04na9ut7s07ductbn34lntjiuffg@4ax.com... On Fri, 2 Jan 2004 00:29:47 -0600, "Rob" <rob@hotpop.com> wrote:I'm directly connecting two PC's each with Intel Pro Gigabit NIC's. Do Istill need to use crossover cables, or can I use straight-through. Also,will Cat 5e cable enable maximum performance from these cards? Cross-over cat5e will be fine...

[CJT]

dg wrote:
I have never used gigabit, but I know it uses all 8 wires so I would guess straight through would be the way to go.

My guess is that your guess would be incorrect.

On the other hand, most devices seem to be smart these days-figuring out if a cable is crossed or standard automatically. --Dan "daytripper" <day_trippr@REMOVEyahoo.com> wrote in message news:9debvv04na9ut7s07ductbn34lntjiuffg@4ax.com...On Fri, 2 Jan 2004 00:29:47 -0600, "Rob" <rob@hotpop.com> wrote:I'm directly connecting two PC's each with Intel Pro Gigabit NIC's. Do Istill need to use crossover cables, or can I use straight-through. Also,will Cat 5e cable enable maximum performance from these cards?Cross-over cat5e will be fine...


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[DaveinOlyWa]

u r right, gigabite ethernet does use all 8 wires...

but so does fast ethernet. and what does that have to do with
crossovers?

the reason that u must use crossovers is because ethernet cable is
half duplex.

iow, its one way communication. period. so the only way you get full
duplex (look at it like, walkie-talkies is half duplex, telephone is
full duplex) is that you must have separate wiring for each
direction.

if you use straight thru cabling then the send wire will be connecting
to the send wire on the RECEIVING pc....

now it would stand to reason that if the cable is only capable of one
way communication, then obviously there will be problems when trying
to jam signals into the out door. (realizing of course that the send
is out bound, receive is inbound)

get it?

[CJT]

DaveinOlyWa wrote: u r right, gigabite ethernet does use all 8 wires... but so does fast ethernet.

I don't think so.

and what does that have to do with crossovers? the reason that u must use crossovers is because ethernet cable is half duplex.

That's stated too broadly. You're perhaps too young to know about
ethernet before Cat5.
iow, its one way communication. period. so the only way you get full duplex (look at it like, walkie-talkies is half duplex, telephone is full duplex) is that you must have separate wiring for each direction. if you use straight thru cabling then the send wire will be connecting to the send wire on the RECEIVING pc.... now it would stand to reason that if the cable is only capable of one way communication, then obviously there will be problems when trying to jam signals into the out door. (realizing of course that the send is out bound, receive is inbound) get it?

[Guest]

the reason that u must use crossovers is because ethernet cable is half duplex.

no, it's full duplex - Tx data up one pair, Rx data back down another pair.

That's why you need to cross 2 pairs over, so each end is sending data to the
other ends RX input.

The other 2 pairs are spare in cat5, though they are now using them to carry
power (which can be very handy).

Clive