UTP Straight and Cross Over UTP Cables

Share this article is about UTP cable (Unshielded Twisted Pair), this article is request from buddy adhie yfs, without intending to patronize here is a discussion about UTP cable that the author knows.

UTP cable is one of the most widely used transmission media to create a local network (Local Area Network), in addition to the relatively cheap price, easy to install and quite reliable. As the name implies Unshielded Twisted Pair means twisted pair cable is unshielded (twisted pair). This winding function is as elemination to induction and leakage. Previously there is also STP cable (Shielded Twisted Pair), for example the picture can be seen below:


There are several types of UTP cable categories that indicate the quality, the number of winding density pairnya, the higher the categorization more tightly coil and other parameters such as the following:

UTP Cable Category 1
Used for telephone communication (transmitting low speed data), so it is not cocock to transmit data.
UTP Cable Category 2
Capable of transmitting data at speeds up to 4 Mbps (Megabits per second)
UTP Cable Category 3
Used on 10BaseT network, capable of transmitting data at speeds up to 1Mbps. 10BaseT stands for 10 Mbps, Baseband, Twisted pair.
UTP Cable Category 4
Often used in token ring topology, capable of transmitting data at speeds up to 16 Mbps
UTP Cable Category 5
Capable of transmitting data at speeds up to 100 Mbps,
UTP Cable Category 5e
Capable of transmitting data at speeds up to 1000 Mbps (1Gbps), signal frequency that can be passed up to 100 MHz.
UTP Cable Category 6
Capable of transmitting data at speeds up to 1000 Mbps (1Gbps), signal frequency that can be passed up to 200 MHz. Physically there is a separator made of plastic that serves to separate the four pairs in the cable.
UTP cable Category 7 gigabit Ethernet (1Gbps), 400 MHz signal frequency
For UTP cabling, there are two types of UTP cabling commonly used in computer network especially LAN, that is Straight Through Cable and Cross Over Cable

Straight cable
Straight cable is a cable that has the same way of mounting between the tip of one with the other end. Straight cable is used to connect 2 different devices.

The standard straight cable order is as follows: in accordance with TIA / EIA 368B standard (the most widely used) or sometimes also used according to TIA / EIA 368A standard as follows:


Examples of straight cable usage are as follows:

  1. Connecting between computers with switches
  2. Connecting a computer with a LAN on a cable / DSL modem
  3. Connecting router with LAN on cable / DSL modem
  4. Connect the switch to the router
  5. Connect the hub to the router

Cable cross over
Cross over cable is a cable that has a different arrangement between one end with
Tip two. Cross over cable is used to connect 2 devices of the same. The picture below is a standard cross over cable arrangement.


Examples of cross over cable usage are as follows:

  1. Connect 2 pieces of computer directly
  2. Connecting 2 pieces of switch
  3. Connect 2 hubs
  4. Connect the switch with the hub
  5. Connecting a computer with a router

Of the 8 cables in this UTP cable (both on straight and cross over cable) only 4 pieces are used to send and receive data, ie cable on pins no 1,2,3 and 6.

Creating Straight and Cross Over cables
To make a network cable using UTP cable there are some equipment that we need to prepare, that is UTP cable, RJ-45 Connector, Crimping tools and RJ-45 LAN Tester, for example picture as below:


Practice making Straight wires

  1. Peeled end of UTP cable, about 2 cm
  2. Open cable ties, straighten and order the cables according to TIA / EIA 368B standard
  3. After the order is up to standard, cut and flatten the ends of the cables,
  4. Insert the straight and aligned cable into the RJ-45 connector, and make sure all the cables are correctly positioned.
  5. Crimping using crimping tools, press crimping tool and make sure all pins (brass) on the RJ-45 connector have "bitten" each cable.
  6. When finished on the other end, do it again at the other end
  7. The last step is to check the cables that we have made earlier by using a LAN tester, how to input each end of the cable (RJ-45 connectors) to masing2 available ports on the LAN tester, turn on and make sure all the LEDs light up in accordance with the cable sequence That we make.
  8. Below is an example of a UTP cable that has been correctly attached RJ-45 connector, cable casing (blue) attached to the connector, the cable sequence from left to right (in the picture below the cable pin sequence starts from top to bottom).

Thus a glimpse of UTP cable, UTP cable category, standard straight and cross over cable sequence and how to make straight network cable using crimping tools, hopefully can help.



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