Design And Construction Of A Computer Network Tester

ABSTRACT

This project is titled the design and construction of a computer network tester. It is designed to meet up with the safety and accuracy demand in flow of signal in computer network.

It is design to detect If the cable carries the signal, this indicates that all the circuits are closed, meaning that electric current can move unimpeded through the wires, and that there are no short circuits, or unwanted connections, in the wire. A network cable tester can identify if the wires are paired correctly. It can also show if there is a break in the insulation, a situation which allows crosstalk between two wires that should not be connected. The tester can also tell whether the cable has the proper level of resistance.

This project was designed for confirming the continuity and correct wiring of computer network leads which have 8 wires, but it can be used to check any lead with up to 8 wires by using appropriate connectors.

TABLE OF CONTENT

Title Page

Approval Page

Dedication

Acknowledgement

Abstract

Table of Content

CHAPTER ONE

1.0     Introduction

1.1     Function of computer network

1.2     Network Cable Installation Tools

CHAPTER TWO

2.0     Literature review

2.1     Major Component’s Description

2.1.1  Resistors

2.1.2  Diodes

2.1.3  Capacitors

2.1.4  Transformers

2.1.5  Integrated Circuit

CHAPTER THREE

3.0     Construction

3.1      block diagram

3.2.0 Sectional description of the system

3.2.1  Power supply unit

3.2.2 Timing unit

3.2.3 Controller unit

3.2.4 Output unit

3.3      Circuit diagram

3.4      Components used

CHAPTER FOUR

4.0     Construction Procedure and Testing

4.1     Casing and Packaging

4.2     Assembling of Sections

4.3     Testing of System Operation

4.4      Cost Analysis

CHAPTER FIVE

5.0     Conclusion

5.1     Recommendation

5.2     Bibliography

CHAPTER ONE

1.0     INTRODUCTION

The idea behind the design and construction of this system is to make available or alternative means providing safety and accuracy demand in flow of signals in computer network. This goes a long way in helping to curb the problem frequently encountered as a result of open circuit and unwanted connection, in the wire.

When connected to an Ethernet cable, a network tester tells if the cable is capable of carrying an Ethernet signal. If the cable carries the signal, this indicates that all the circuits are closed, meaning that electric current can move unimpeded through the wires, and that there are no short circuits, or unwanted connections, in the wire. Network cable testers vary in complexity and price, but a basic tester consists of a source of electrical current, a measuring device that shows if the cable is good, and a connection between the two, usually the cable itself.

Computer networks use Ethernet cables to allow computers in the network to “talk” to each other. An Ethernet cable has eight wires that are arranged in four pairs. For current to flow correctly, the wire pairs must be connected in the proper order.

A network cable tester can identify if the wires are paired correctly. It can also show if there is a break in the insulation, a situation which allows crosstalk between two wires that should not be connected. The tester can also tell whether the cable has the proper level of resistance.

If a network isn’t working correctly, the problem is frequently user error or other problems. It will rarely be a faulty cable. A network cable tester is more frequently used to tell whether a patch cable will work before it is connected. The cabling should first be examined visually to identify any obvious problems. If everything looks correct, a network cable testing device may then be used.

A network tester is a simple apparatus that merely identifies whether current flows through the cable, or it may be a professional-level, complex device that gives additional information that helps identify the problem. Professional-level network cable testers may not only tell if an open circuit exists, but may identify where the break is located. Some also identify the gauge of wire used and can generate their own signal to test for interference.

Basic network testers can test for simple connectivity issues but may not identify other problems that cause the cable to malfunction. Cabling may not work when it is near a source of interference or if the cable is too long. Intermittent faults may develop that do not show up when the cable is tested. Sometimes the problem is not sustained long enough to show up on the tester.

1.1 FUNCTIONS OF A COMPUTER NETWORK

A computer network consists of a group of computers and devices interconnected by communications channels, facilitating communications among multiple users. Computer networks make it possible for users to share multiple resources and access shared files. A hardwired network connection provides more secure and stable connections, transferring data directly. As with most computer connectivity, special tools are required to build a successful computer network.

1.2 Network Cable Installation Tools

Cables

Cable is the medium through which data moves from one network device to another. Local area networks, or LANs, can be created using any of several cable types. Although many networks utilize one specific cable type, a variety of cable types may be used. Understanding each cable type’s characteristics and how they relate to other network aspects, such as protocol, topology and size, is necessary for successful network development. The most commonly used cable types are unshielded twisted pair (UTC), shielded twisted pair (STP), coaxial and fiber optic.

Connectors

Registered Jack 45 connectors are standard for network cable use. RJ-45 connectors feature eight pins, allowing the cable to interface electronically. Standard RJ-45 connector pin- outs define the individual wire arrangements required for attaching the connector to the cable.

Modular Plug Crimp Tool

The modular plug crimp tool securely crimps RJ-45 connectors onto the cable. A variety of styles are available, though their uses depend on the type of work to be completed within the network. Among the most popular crimp tool styles are compression, ribbon cable, no ratcheting, open barrel, quick disconnect and ratcheting.

Stripping Tool

Cable stripping tools strip the insulation jacket from the cable, preparing the conductors for termination. Stripping tools include areas designed to slit the cable, cut off the jacket and strip measured lengths of the conductors.

Diagonal Cutters

Diagonal cutters, or wire cutters, cut the cable off of the reel and aid in fine-tuning cable ends during termination. If no cable stripping tool is available, a technician may substitute a small utility knife and diagonal cutters to slice and prepare the cable.

Electrician Snips

Electrician snips, made with high-quality forged steel construction, are strong and durable tools. The blades feature a file and scraper on both sides for wire cleaning and a notched scissor blade for wire stripping. Most electrician snips will cut up to 16-gauge solid wire and up to 12-gauge stranded wire.

Network Cable Tester

Network cable testers test network cable circuit connectivity and operation. These are used to judge wrong connections, short circuits and open circuits. Most are compact in design and operate on 9-volt batteries.