pins 1&2 are a pair
pins 3&6 are a pair
short cables wired 1-1, 2-2, 3-3, 4-4, 5-5,... will work. (<10meters?)
If you only have two NICs, a 'crossover' cable is cheaper than two
cables and a hub. :-|
HTH, Chuck nc8q
Riley Williams wrote:
> Hi Paul.
>
> >> Is the network connection using BNC cable or twisted pair
> >> cable? If BNC cable, you can stop here as the rest of this
> >> doesn't apply, but please let me know so I know to ignore
> >> this as well.
>
> > I'm using twisted pair.
>
> >> Assuming the lead uses twisted pair cable, is it going
> >> directly between the two computers, or are there separate
> >> leads from each computer to a hub?
>
> > Each computer is connected to a hub.
>
> That's the exact case where I met this problem...
>
> >> Also, did you make the cable yourself from scratch; is it
> >> one you've bought in that's unmodified; or is it one you've
> >> bought in that you've shortened?
>
> > No the cables were premade and were included in the network
> > kit.
>
> In that case, you're going to hate what I'm about to say, but as
> a quick summary, you probably have a faulty cable.
>
> The required connections are symmetrical in this case, but
> there's no easy way of checking that they are completely correct
> other than taking the plug off one end and remaking it.
>
> The cable used is called "Twisted Pair" because it comprises four
> separate PAIRS of cables, and the members of each pair are
> twisted together along the whole length of the cable. The two
> wires that form each pair are also colour coded, one comprising a
> solid colour, the other being white with bands of that solid
> colour.
>
> Unfortunately, as the wiring isn't quite what one might at first
> assume, it is quite common for two of the wires that are white
> with a band of colour to get swapped over. The result of doing so
> is that the cable only works in one direction, which is exactly
> what you are seeing.
>
> If you hold the cable up, and slip the hoods (if fitted) off the
> plugs, you should find that the plugs themselves are transparent.
> Hold them side by side with the tab away from you, and you should
> be able to tell where the four wires with solid colours connect
> to. The pattern you should see is as follows:
>
> 1. One of the solid coloured wires goes into one of the end
> connectors. The matching white with coloured band should
> go into the adjoining connector at the same end.
>
> 2. Another of the solid coloured wires should go into the
> second connector from the opposite end. The matching
> white with coloured band goes into the adjoining end
> connector.
>
> Those two pairs are exactly as you might expect. Unfortunately,
> the other two pairs are not...
>
> 3. If you look at the third connector from the first end, that
> should also have a solid coloured wire going to it. However,
> the matching white with coloured band wire does NOT go into
> the adjoining connector, but to the third wire from the
> second end.
>
> 4. Finally, the fourth wire from the second end is the fourth
> solid coloured wire, and its matching white with coloured
> band is the fourth wire from the first end, thus adjoining
> it on the WRONG side.
>
> I would suspect that one of your cables has the two white with
> coloured band wires referenced in (3) and (4) above swapped
> over at ONE END ONLY. If so, you will need to return the wire in
> question to the shop you bought it from and get it replaced with
> a good one, or alternatively to strip the connector off and
> rewire it correctly. Unfortunately, the pliers needed to rewire
> those connectors tend to be expensive.
>
> Best wishes from Riley GM7GOD / KB8PPG.
>
> ---
> * God Made 7 Greedy Old Devils
> * Kilroy Bought 8 Personal Pregnancy Guides
