Cross Cable
Straight Cable
How can you can connect PC to switch with straight or cross-over cable, what is the difference between these two ways, Straight through cable vs Crossover cable? Why are their two types of cables? What do they do?Straight through cable means, the cable wire goes through straight, transmission wires over to the reception end. You use a crossover cable when you are connecting two PCs together directly (NIC to NIC). To connect Router to Router and Computer to Computer need Crossover and the usually the rest need Straight-through cable.
You use a straight-through cable when there is a hub, switch or router between the two or more PCs (NIC-Hub/Switch/Router-NIC). The is no difference in speed, it's just a method of communicating. It depends on the hardware, all you need is either a free LPT or com port on each computer and a cable plugged into these ports between each computer.
The simple answer is a crossover cable is used when you are connecting two PCs together directly (NIC to NIC), to connect two computers to each other, you use a crossover cable. When two crossover cables are connected in series, as when going through a patch panel, the result would no longer be a crossover.
Take a good look at the picture above, it shows what I mean. In a straight through cable, both ends are arranged as end A, while in a crossover cable, one end is arranged as end B.
This can also help if you want to make a cable yourself
You use a straight-through cable when there is a hub, switch or router between the two or more PCs (NIC-Hub/Switch/Router-NIC). The is no difference in speed, it's just a method of communicating. It depends on the hardware, all you need is either a free LPT or com port on each computer and a cable plugged into these ports between each computer.
Reply With Quote In order to connect two computers with crossover cables, you must set their IP addresses to be in sequential order. For example:
You use a straight-through cable when there is a hub, switch or router between the two or more PCs (NIC-Hub/Switch/Router-NIC). The is no difference in speed, it's just a method of communicating. It depends on the hardware, all you need is either a free LPT or com port on each computer and a cable plugged into these ports between each computer.
Straight Cable
- 1
Get all of your materials together. Network cable can be ordered on the internet at various places, i.e. Newegg, Blackbox, etc. RJ45 ends can also be ordered at these websites. The type of network cable is also important. If you want to have speeds greater than 100mbps then you will need either Cat5e or Cat6 cable, with the appropriate ends as well.
- Step 2
After you have all of your materials it is now time to measure out your distances. A good rule of thumb is to measure TWICE how long you want the cable and ADD 10%. Then use the wire cutters to cut the length you want.
- Step 3
Next take one of the two ends and strip the outer jacket about 1 1/4" to 1 1/2". A utility knife may be good for this. Cut off the string inside of the jacket and also, if using Cat6 cable, the plastic divider, inside the jacket, that helps with the crosstalk on the wires.
- Step 4
Untwist all of the wires as far down as possible to help with ordering them next to each other.
- Step 5
T568B wiring diagramThere are two ways to order the wires, based off of the T568A and T568B Wiring. The most common is the T568B Wiring so this article will focus on that. The order of the wires is as follows:
Striped Orange
Solid Orange
Striped Green
Solid Blue
Striped Blue
Solid Green
Striped Brown
Solid Brown - Step 6
After you have ordered the wires correctly, use your thumb and index finger of the hand that is not holding the wire and bend the wires back and forth. This should help get the wires straight and close together.
- Step 7
Next use the wire cutters and cut at the point where the wires are the straightest and closest together. This will make it easy to put it into the network end. Make sure you leave enough wire to make it to the pins of the connector, but not too long to where the wires are hanging out the back of the network end. This is where pass through connectors are handy.
- Step 8
After you cut the wires take the network end with the tab facing down and slide it onto the wires. When you are sure your wires are in far enough, use the crimper to crimp the RJ45 connect onto the cable. Make sure to squeeze tight to ensure the end is on nice and tight.
- Step 9
Repeat Steps 3 through 8 for the other end.
- Step 10
If you have a cable tester, test to make sure the network cable is wired correctly, refer to the manufacture' s instructions for this. Now you're done!
Cross Cable
Creating an RJ45 crossover cable
What's an RJ45 plug?
A network card may have several types of connectors, with the most common being:
- An RJ45 connector;
- A BNC connector (coaxial cable).
The RJ-45 is the one which interests us here, as it it the most widely used. The cables used are called twisted pairs, as they are made up of four pairs of wires braided together. Each pair of wires is made up of a solid-coloured wire and a wire marked with stripes of that same colour. It is highly recommended to use a category 5 cable between 3 and 90 metres long. There are two wiring standards which differ in the position of the orange and green pairs, defined by the Electronic Industry Association/Telecommunications Industry Association:
| TIA/EIA 568A | TIA/EIA 568B | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 RJ45 plug - Standard TIA/EIA 568A"> |  RJ45 plug - Standard TIA/EIA 568B"> | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RJ45 connector on a male plug seen from the front, with contacts pointing up.
Why use a patch cableRJ45 is normally used to connect computers by way of a hub (a distribution box into which the RJ45 cables coming from the local area network computers are connected) or a switch.
When a computer is connected into a hub or switch, the cable used is called a patch cable, which means that a wire linked to plug 1 on one end is linked to plug 1 on the other end. The standard generally used for making patch cables is TIA/EIA T568A; however, there are also TIA/EIA T568B patch cables (the only difference is the colours of some of the wires, which does not affect the proper functioning of the connection, as long as the wires are joined the same way). Why use a crossover cableA hub is very useful for connecting many computers, and overall is faster than a coaxial cable connection. Nevertheless, to connect two machines to one another, there is a way to avoid having to use a hub. It involves using a crossover cable (also called a cross cable), which has two wire that cross over one another. The recommended standard for this type of cable is TIA/EIA T568A for one of the ends, and TIA/EIA T568B for the other. This kind of cable can, of course, be purchased, but it is very easy to make on one's own. Making a crossover cableTo make an RJ45 crossover cable, buy a patch cable, split it in the middle, and then reconnect the wires as follows:
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