Re: Which ethernet wires go where

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Author: Alan Dayley
Date:  
To: Main PLUG discussion list
Subject: Re: Which ethernet wires go where
The following help I offer as what I would try if I were in your
situation, as I understand it. If it does not work or make sense, let
me know. I'll check email again late tonight.

Josef Lowder wrote:
> .
> Thanks to everyone who has responded to my several questions
> on this subject, but I still do not have any information on
> how to hook up this Asante ethernet 5-port hub that I now have
> (it actually has six "ports"), and how can I tell if I have the
> right kind of cables? One is red, one is blue, and one is yellow.


The colors of the cables do not matter.

> I have received bits and pieces of information from several
> kind folks (along with a couple of sarcastic rants hinting at
> how stupid I am). I am sorry that I need can't read between
> the lines on this, and I have searched the 'net looking for
> a wiring diagaram, but have not been able to find one.
>
> As I said, there are actually six "ports" on this Asante hub.
> One is labeled "Uplink" and the other five are numbered 1 thru 5.
> I have three RJ45 wires, but how can I tell if they are the
> correct wires (i.e. straight-thru -vs- crossover)?


Ignore the "Uplink" port. All connections go into ANY of the 1 thru 5,
they are all the same.

> When I try to examine the wire colors in the three patch
> cords I have, the color combinations seem to be different
> from one cord to another and from one end of each cord to
> the other.


The color sequence of the wires inside the cable "should" be consistent
one cable to the other but some makers do not follow the standard. It
is important that they are consistent within the one cable.

Hold both ends of one cable so that the retaining clips are facing the
floor. Point the ends away from you, rasping the cable and hold the
ends side by side. In a straight through cable the color order will
match, left to right, in both ends. In a crossover cable the color
order between the ends will be the opposite (I think).

If you are lucky, your network adapter ports or your hub ports will
auto-detect straight or crossover and it will not matter. It is best to
use the straight through cables for your current use.

> Into which of the six ports do I connect the 2-wire modem/router?
> Into which of the six ports do I connect the two (or more)
> computers --- i.e. in what sequence?


Connection sequence does not matter, really, since the computers should
be turned off when you connect them. I generally don't turn things off
but they "should" be.

Plug a cable into the port on your modem/router that you would connect
straight to a computer. Instead of plugging the other end of that cable
into a computer, plug it into any of the hub ports 1 thru 5. (I like to
use 1 for the Internet side.)

Plug a cable into hub port 2 and the other end into computer A. Plug a
cable into hub port 3 and the other end into computer B.

Check the "Link" LEDs on the hub and on the computer ports. They should
be lit the moment (or just after the moment) the hub and modem or hub
and computer have power. If they don't light, you may have a crossover
cable that the hub or computer cannot adjust for. Or the hub port may
be bad so try another one.

> I realize that all of this is "automatic" to all of you brilliant
> gurus, but for those of us who have never connected anything like
> this, it is frustrating to try to sort out bits and pieces of
> incomplete information.


I sympathize. We'll get there.

All gurus should feel free to correct my instructions above or fill in
the holes where I am wrong. I've been known to be an idiot at times.

Alan



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