Using Four Wires for a Network: Essential Twisted Pair Cable Conductors?

Hello,

I want to do a rather breakneck experiment, namely I have cables for intercoms in the tenement house, which probably will never be there, so I wanted to use them to build a small network for 4 computers, without straining myself with a drill. Now, the basic question, I have 4 wires for each apartment, so is it possible to make a working network on them? Which twisted pair cables really play a role?

We will assume that a typical crimped twisted pair has the following sequence:
- white and orange
- orange
- white and green
- blue
- White and blue
- green
- White-brown
- Brown

so which are ESSENTIAL?

Greetings !

I am not an eagle in these matters, but I know from experience that four wires are enough for a 10 Mb network
-white with blue
-blue
-white with green
-green

for sure you don't need a brown and orange pair when you are using a hub for splitting the joints.

Are needed:
white - orange
orange
white-green
green
that is 1,2,3,6 only whether the wires are of the right category. Check it out.

I am sorry but I did not do the interleaving in the previous post
-white with green
-blue
-white with blue
-green
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"Jaku" check in the hub which contacts are equipped with the construction of the hub socket, it appears that only the four middle wires are active and there is certainly no orange pair there.
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2 posts merged
j.

JAKU is right and that's it.

hmmm .. well, I have two versions ... which one is correct? :-)

the cable is probably not KAT 5, but it is quite short sections, and besides, it is to be used only for the Internet. If it works oki, if not, I will fly with the drill.

For the 10/100 Mb / s transmission, two pairs of cables are needed, as mentioned earlier, the orange and green pairs are used in the gigbit ethernet. You can easily find descriptions of network cables on the electrode and on the net, but do not count on a 100 Mb / s connection because in this case, the correct twisting of the wires is very important. For longer sections, remember to use the orange and green twisted pair cables. Otherwise there may be circuses with the network. I do not know if you will get any connection, and if you do, it will "only" at 10 Mb / s.

Please just the plost cable is not interlaced.

Fine plugs taken care of. However, when it comes to the network on the telephone cable, because it is probably connected to the intercoms, this may be a problem. It seems to me there will be too much trouble, too much interference, the telephone cable is rather unsuitable for 100 or even 10 Mbps transmission. But if you feel like it, check it and write what came out of it. Or maybe someone has already done such experiments, so let him speak.

Kuniarz wrote:

I want to do a rather breakneck experiment, namely I have cables for intercoms in the tenement house, which probably will never be there, so I wanted to use them to build a small network for 4 computers, without straining myself with a drill. Now, the basic question, I have 4 wires for each apartment, so is it possible to make a working network on them? Which twisted pair cables really play a role?

Depends on what you want to get.
If 10Mbit is enough for you, then a regular 4-wire telephone cable is enough to satisfy category 3. At short distances it will go,
If the pairs in this cable are twisted, even 100Mbit has a chance to go up to 60-70m, although this is a big risk.

In an ordinary Category 5 UTP cable, you can boldly play 2 independent transmissions, although I do not recommend it, because makeshifters are the most durable You have a chance to get up to 100Mbit.

As for the cables - it is only important that the cables 1 of 2 and 3 of 6 are from one pair. What colors you choose, it does not matter, although it is good to stick to the standard at least in one plug :)

Quote:

We will assume that a typical crimped twisted pair has the following sequence:
- white and orange
- orange
- white and green
- blue
- White and blue
- green
- White-brown
- Brown

There are several standards for coloring - I know 3 commonly used ones, of which 2 are the basic ones: T568A and T568B (you showed B here).
Couples are important.
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Oh - one more thing.

With this maneuver, you block your way to the gigabit, because all 4 copper pairs are used there. And that it wasn't - gigabit is remarkably cheap now. I have already seen small 5-port 5x1G switches for PLN 300 ....
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2 posts merged
j.

from what they taught me (as I remember correctly), the two middle cables are usually unnecessary blue and white and blue, and this is explained by the fact that someone should not plug in the phone kalba because there is a higher voltage there and it would burn the card! but if I'm wrong don't lynch me

Who knows, maybe it would burn ...

but looking from the side of the contacts so that the cable from the plug comes down, it is used only from the left

1,2,3,6 contact, but 1,2 and 3,6 are pairs (over / rebound)

and the rest is unused only because at 100mb they are not needed and at 1GB they are already
The standard is simply old, but well-thought-out for the future.

greetings

Hello
I have a fairly simple question, but I do not know the answer, looking on the net, I found only how to patch the cable, but not where it is most often used, i.e. in what cases or all the time what is the principle of its operation? does the cable from the router, for example, need to be crossed to connect the second computer? (net from cable)
thank you in advance for your answer and please treat the layman gently
ah, I used the 'search' button here on the Electrode for a very long time :)


greetings
Snake

If you can, buy it or make cross cables yourself. The new switches of the router deal with it without any problems and switch themselves as needed. You won't even have any switch, you can use this cable to connect 2 computers. A simple straight cable is not suitable for yours.

A crossover cable is only used to connect two computers without intermediate devices and possibly for cascading switches / hubs, but these usually have an additional 'upliknk' socket or a switch that switches the last port between 'normal' and 'cascade'. The computer with a switch or router is connected with a straight cable.

robt wrote:

Fine plugs taken care of. However, when it comes to the network on the telephone cable, because it is probably connected to the intercoms, this may be a problem. It seems to me there will be too much trouble, too much interference, the telephone cable is rather unsuitable for 100 or even 10 Mbps transmission. But if you feel like it, check it and write what came out of it. Or maybe someone has already done such experiments, so let him speak.

Hi, I have an eight-core gelled telephone cable (I do not remember the marking, but I will try to check) it connects 2 switches - a distance of about 60m - about 30m dug into the ground, the rest outside and at home without any pipes, etc., so in winter the connection must be 100Mbit. transfer between computers within 3-3.5 MB / sec. everything works for almost 2 years, so it's probably OK

Greetings