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Twisted pair cables have two conductors that are generally made up of copper and each conductor has insulation. These two conductors are twisted together, thus giving the name twisted pair cables. One of the conductors is used to carry the signal and the other is used as a ground reference only.Twisted Pair Cables Applications Twisted-pair cables are used in telephone lines to provide voice and data channels. The local loop-the line that connects subscribers to the central telephone office-commonly consists of unshielded twisted-pair cables.6. Applications of coaxial cable are in internet connections, television signal distribution, and radio transmissions, etc. Applications of twisted pair cable are in telephone networks and cable shielding.
Twisted Pair Cable | Guided media | Computer Networks | Lec – 39 | Bhanu Priya
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In the previous article, we saw the structure and application of coaxial cables used in the physical layer. Now, in this post, we’ll look at the basic details about twisted pair cable properties and their various applications. The structure of twisted pair is shown in the figure below. This is a very common medium and it is less expensive than coaxial or fiber optic cables. A twisted pair is essentially two conductors (usually copper) twisted together, each with their own plastic insulation. One of the wires is further used to transmit the signal to the receiver and the other is only used as a ground reference. The receiver uses the difference between the two. Twisted pair cable is a wire in which the two conductors of a single circuit are twisted together to eliminate electromagnetic interference from external sources.
Types Of Twisted-Pair Cables !!
Two commonly used twisted pair cables are as follows: 1. Unshielded twisted pair (UTP) 2. Shielded twisted pair (STP) The structures of UTP and STP cables are shown in the figure above. Shielded twisted pair STP cables have foil or braed mesh shields that primarily enclose each pair of insulated conductors. Although the metal casing improves the quality of the cable by preventing noise or crosstalk from entering, it is bulkier and more expensive. This is called a metal shield and is usually grounded to reduce noise interference. But this makes the cable bulky and expensive. Therefore, in practice, UTP is used more than STP. STP was developed by IBM and is mainly used only by IBM Corporation. Twisted pair can also be used for analog or digital transmission. The bandwth supported by the wire depends on the thickness of the wire and the distance the signal must travel over it. Twisted pair supports several megabits per second over several kilometers and is less expensive.
Characteristics of STP Of Twisted Pair Cable !!
Twisted pair conductors are shielded by bra to reduce noise interference. .Low cost medium and supports data rates up to several Mbit/s.
Unshielded Twisted Pair (UTP)
A twisted pair consists of two insulated conductors as shown. It can be shielded or unshielded. Unshielded twisted pair cable is usually very cheap and easy to install. But they are severely affected by electromagnetic noise interference. In balanced pair operation, the two lines carry equal and opposite signals, and the target sees the difference between the two. This is called differential mode transmission. The cable is usually 22 or 24 AWG (American Wire Gauge) copper wire with colored insulation. Twisted pair cables reduce the effects of noise or external interference. The induced EMFs in the two wires due to the interference tend to cancel each other out due to the twisting. The number of twists per unit length then determines the quality of the cable. So more rotation means better quality.
Characteristics Of Unshielded Twisted Pair (UTP)
1. These cables prove less crosstalk and higher signal quality over longer distances. Therefore, these cables are wely used for high-speed computer communication. 2. The lines are not shielded and can support data rates of several Mbit/s. 3. For analog and digital telephony applications such as B. LAN etc. 4. High noise and electromagnetic interference.
Connectors used with the twisted pair cables
In order to connect one computer to another, we need to use a transmission medium such as a cable. To connect these cables between two computers, we need connectors on both ends of the cable. Unshielded twisted pair (UTP) cables are the most commonly used cables in computer communications. RJ45 is the most commonly used UTP, RJ is the abbreviation of Registered Jack. It is a male-female coded connector.
Applications of Twisted Pair Cables 24 awg twisted pair shielded cable
UTP cables are used in many Ethernet, telephone systems, and security camera systems. Twisted pair cables are used in telephone lines to prove voice and data channels. The DSL lines used by telephone companies to prove high data rate connections also use the high bandwth capabilities of unshielded twisted pair cable. In the next article, we will dive into the detailed working principles and applications of fiber optic cables. So stay tuned. report this ad
What are the applications of twisted pair cable?
Twisted Pair Cables Applications Twisted-pair cables are used in telephone lines to provide voice and data channels. The local loop-the line that connects subscribers to the central telephone office-commonly consists of unshielded twisted-pair cables.
What are the application areas of twisted pair and coaxial cable?
6. Applications of coaxial cable are in internet connections, television signal distribution, and radio transmissions, etc. Applications of twisted pair cable are in telephone networks and cable shielding.
What are 3 advantages of twisted pair cable?
Advantages of Twisted pair cable :
If portion of a twisted pair cable is broken it doesn’t effect the whole network. Less vulnerable to electrical interference caused by nearby equipment or wires. It cause interference themselves. Best performance in short distances.
What is twisted pair cable explain?
Twisted pair is the ordinary copper wire that connects home and business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other. Each connection on twisted pair requires both wires.
What are the characteristics of UTP?
UTP cable is a 100 ohm copper cable that consists of 2 to 1800 unshielded twisted pairs surrounded by an outer jacket. They have no metallic shield. This makes the cable small in diameter but unprotected against electrical interference. The twist helps to improve its immunity to electrical noise and EMI.
What are the important characteristics of coaxial cable?
- It has twisted pair with a shield.
- It has a center conductor covered with an insulator, then braided or solid outer conductor, and then insulation.
- It has heavier insulation than most cables.
- It is vulnerable to high frequency interference.
What is application of coaxial cable?
Coaxial cables, or RF cables, are typically used in applications when transferring radio frequencies are necessary. Coaxial or RF cables are used in a wide range of applications including broadband CATV, telecommunications, antennae, video, data control and instrumentation.
What are the characteristics of fiber optic cable?
- Extremely high throughput.
- Very high resistance to noise.
- Excellent security.
- Ability to carry signals for much longer distances before requiring repeaters than copper cable.
- Industry standard for high-speed networking.
What are the advantages and disadvantages of shielded twisted pair?
- It has a higher cost per foot of wire.
- Shield of STP cables must be grounded properly otherwise it acts as an antenna and picks up unwanted signals.
- More expensive than UTP.
- Difficult to and maintain.
- Much thicker diameter and not as flexible.
What are the applications advantages and disadvantages of coaxial cable?
- The cost of a coaxial cable is less.
- Highly resistant to physical damage.
- Highly resistant to EMI.
- Great channel capacity.
- The transmission rate is high.
- It is small in diameter.
- It is less susceptible to noise interference compare to twisted pair.
How is twisted pair cable classified?
There are two main types of twisted pair cables, unshielded twisted pair (UTP), and shielded twisted pair (STP), which contains each pair of wires within an aluminium foil shield for further isolation.
Why do we need a twisted pair?
Twisted pairs are made up of two insulated copper wires that are twisted together. The twisting is done to help cancel exterior electromagnetic interference. Crosstalk interference can come from other pairs within a cable.
What is the speed of twisted pair cable?
|Fiber optic cable||10/100/1000 Mbps, 10/40/100/200 Gbps||Up to 4700 MHz|
|Twisted pair cable||Up to 10 Gbps||Up to 4700 MHz|
|Coaxial cable||—||750 MHz (default)|
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Twisted Pair Cables Characteristics and its Applications
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