Type Coaxial Cable

Types of coaxial Cable is known there are two types, namely thick coaxial cable (have a large diameter lumayan) and thin coaxial cable (have a smaller diameter).

1) Thick coaxial Cable

Coaxial cable has a size that varies. Diameter of the largest cable intended for use as an Ethernet backbone Histories has a long transmission and noise rejection greater. Coaxial cable is often known as thicknet. Coaxial cable of this type is specified based on the standard IEEE 802.3 10BASE5, where cable has an average diameter of 12mm, and is usually given a yellow color; cable of this type is referred to as the normal or standard thick ethernet Ethernet, or only abbreviated ThickNet, cuman or even referred to as yellow cable.




As the name implies, this type of cable, because the large size, in some particular situations can be difficult to install. A practical guide states that the more difficult to install the network media, the more expensive media are installed. Coaxial cable has a cost of more expensive installation of twisted pair cable. Cable thicknet almost never used anymore, except for special interests.

This coaxial cable (RG-6) when used in the network have any specifications and rules as follows:


Each edge must diterminasi with 50-ohm terminator (the terminator is recommended that you have built, not to use one 50-ohm resistor 1 watt, for the resistor voltage disipasi have the rather wide).

Segment with a maximum of 3 connected equipment (attached devices) or populated segments.

Every network card has an additional relay (external transceiver).

Each segment contains a maximum of 100 network devices, including repeaters in this case.

Maximum cable length per segment is 1640 feet (or about 500 meters).

Maximum distance between the segment is 4920 feet (or about 1500 meters).

Each segment should be ground.

Rarely maximum between pencabang tap or from the main cable to the device (device) is 16 feet (about 5 meters).

Rarely is the minimum inter-tap 8 feet (about 2.5 meters).



2)Thin coaxial Cable

Along with the growing thickness or diameter of the cable, then the difficulty level of the process will be the higher. Should note that the type of cable ThickNet be drawn through the existing pipeline and pipe size is limited. Therefore diciptakanlah Thin coaxial cable to overcome the problems mentioned above.



This type of coaxial cable used in the many amateur radio, especially for a transceiver does not require a large power output. To be used as network devices, this type of coaxial cable must meet the standard IEEE 802.3 10BASE2, where the average diameter of around 5mm and usually black or other dark color. Each device (device) is connected with a BNC T-connector. This type of cable is also known as thin Ethernet or ThinNet.

This type of coaxial cable, for example, type RG-58 A / C or U / U, if implemented with Tconnector and terminator in a network, must follow the rules as follows:


Each end of the cable be 50-ohm terminator.

The maximum length of cable is 1000 feet (185 meters) per segment.

Each segment of a maximum of 30 connected network device (devices)

Network card is using the onboard transceiver, does not need additional transceiver, except for the repeater.

Maximum segment 3 is connected to one another (populated segment).

Each segment should be equipped with a ground.

Minimum length between the T-Connector is 1.5 feet (0.5 meters).

Maximum cable length in one segment is 1818 feet (555 meters).

Each segment has a maximum of 30 devices connected.


First Ethernet network using coaxial cable outside diameter of only 0.35 cm (sometimes known as thinnet). This cable is especially useful for cable installations that require bending and pelilitan. Because of easy to install, the cable is also cheaper to install. This encouraged some people call as cheapernet. However, this cable requires special handling. Often the failure to do so. As a result, the signal transmission terinterferensi by noise. Therefore, apart from a small diameternya, thinnet is rarely used on Ethernet networks.

Thicknet can reach up to 500 meters, and the device is connected directly to the cable using the Ethernet transceiver to the AUI cable. On the other hand thinnet more flexible and can reach up to 185 meters. Computer connected to the cable using BNC connectors. Thicknet Ethernet specification using 10 base 5, while thinnet using 10 base 2.

Though difficult in the coaxial cable pairs, but it has a high hurdle to ganguan elektromagnet. And the cable has a maximum distance of more than cable "twisted pair".

Next will be concluded on the advantages and disadvantages coaxial cable:

Excellence


1) Can be used for distributing the information up to 900 telephone channels

2) Can be planted in the ground so that more low-cost treatment

3) Because of the insulation cover the small possibility of interference occurs with other systems


Weakness


1) Having redaman is relatively large, so that for long-distance relationships must be installed repeater-repeater

2) If the cable is installed above ground, vulnerable to physical interference-interference could result in ending the relationship.