Pin - Connections for Twisted Pair

Creating Straight Twisted Pair Cable




Here are a few other points to remember when dealing with RJ-45 connectors and twisted-pair cable:

The pins on the RJ-45 connectors aren’t numbered, but you can tell which is pin 1 by holding the connector so that the metal conductors are facing up.



Some people wire 10baseT cable differently — using the green and white pair for pins 1 and 2 and the orange and white pair for pins 3 and 6. This doesn’t affect the operation of the network (the network is color-blind), as long as the connectors on both ends of the cable are wired the same!

If you’re installing cable for a Fast Ethernet system, you should be extra careful to follow the rules of Category-5 cabling. That means, among other things, making sure that you use Category-5 components throughout. The cable and all the connectors must be up to Category-5 specs. When you attach the connectors, don’t untwist more than 1.2 inch of cable. And don’t try to stretch the cable runs beyond the 100-meter maximum. When in doubt, have cable for a 100 Mbps Ethernet system professionally installed.

Creating Crossover Cable

Crossover Cables is a cable that you can use to directly connect two devices without a hub or switch.

You can use a crossover cable to connect two computers directly to each other, but crossover cables are more often used to daisy-chain hubs and switches to each other.

If you want to create your own crossover cable, you have to reverse the wires on one end of the cable.

Note that you don’t need to use a crossover cable if one of the switches or hubs that you want to connect has a crossover port, usually labeled Uplink. If the hub or switch has an Uplink port, you can daisy-chain it by using a normal network cable.

Installing Twisted Pair Cable

Installation Guidelines:

1.Purchase twisted-pair cable in prefabricated lengths, such as 50 feet, 75 feet, or 100 feet.
2.Always use a bit more cable than you need, especially if you’re running cable through walls.
3.When running cable, avoid sources of interference, such as fluorescent lights, big motors, X-ray machines, and so on.
4.The maximum allowable cable length between the hub and the computer is 100 meters (about 328 feet).
5.If you must run cable across the floor where people walk, cover the cable so that no one trips over it.
6.When running cables through walls, label each cable at both ends.
7.When several cables come together, tie them with plastic cable ties.
8.Cable ties have all sorts of useful purposes.
9.When running cable above suspended ceiling panels, use cable ties, hooks, or clamps to secure the cable to the actual ceiling or to the metal frame that supports the ceiling tiles.

Network Interface Card Installation Guide

1.Gather up the network card and the driver disks.
2.Shut down Windows and then turn off the computer and unplug it.
3.Remove the cover from your computer.
4.Find an unused expansion slot inside the computer.
5.When you find a slot that doesn’t have a card in it, remove the metal slot protector from the back of the computer’s chassis.
6.Insert the network interface card into the slot.
7.Secure the network interface that you removed in Step 4.
8.Put the computer’s case back together.
9.Plug in the computer and turn it back on.