DSL LINE SIMULATOR

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Acknowledgement

I would take this opportunity to thank my research supervisor, family and friends for their support and guidance without which this research would not have been possible.

DECLARATION

I, [type your full first names and surname here], declare that the contents of this dissertation/thesis represent my own unaided work, and that the dissertation/thesis has not previously been submitted for academic examination towards any qualification. Furthermore, it represents my own opinions and not necessarily those of the University.

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Abstract

In this study we try to explore the concept of “DSL LINE simulator” in a holistic context. The main focus of the research is on “DSL Line Simulator” and its relation with “ADSL”. The research also analyzes many aspects of “DSL Line Simulator”. Finally the research describes various factors which are responsible for “DSL Line Simulator”.

Table of Content

CHAPTER 1: INTRODUCTIONI

CHAPTER 2: LITERATURE REVIEW12

CHAPTER 3: METHODOLOGY34

CHAPTER 4: DISCUSSION AND ANALYSIS41

CHAPTER 5: FURTHER RECOMMENDATIONS52

END NOTES58

Chapter 1: Introduction

Digital Subscriber Line (DSL) is a family of technologies that provides digital data transmission over the wires of a local telephone network. DSL originally stood for digital subscriber loop. In telecommunications marketing, the term Digital Subscriber Line is widely understood to mean Asymmetric Digital Subscriber Line (ADSL), the most commonly installed technical variety of DSL. DSL service is delivered simultaneously with regular telephone on the same telephone line. This is possible because DSL uses a higher frequency. These frequency bands are subsequently separated by filtering.

The data throughput of consumer DSL services typically ranges from 256 Kb/s to 40 Mbit/s in the direction to the customer (downstream), depending on DSL technology, line conditions, and service-level implementation. In ADSL, the data throughput in the upstream direction, (i.e. in the direction to the service provider) is lower, hence the designation of asymmetric service. In Symmetric Digital Subscriber Line (SDSL) service, the downstream and upstream data rates are equal.

History

Implementation of Digital Subscriber Line technology originally was part of the Integrated Services Digital Network (ISDN) specification published in 1984 by the CCITT and ITU as part of Recommendation I.120, later reused as ISDN Digital Subscriber Line (IDSL). Engineers have developed higher-speed DSL facilities such as High bit rate Digital Subscriber Line (HDSL) and Symmetric Digital Subscriber Line (SDSL) to provision traditional Digital Signal 1 (DS1) services over standard copper pair facilities. Consumer-oriented Asymmetric Digital Subscriber Line (ADSL), first tested at Bellcore in 1988, was designed to operate on existing lines already conditioned for BRI ISDN services, which itself is a switched digital service (non-IP), though most incumbent local exchange carriers (ILECs) provision Rate-Adaptive Digital Subscriber Line (RADSL) to work on virtually any available copper pair facility—whether conditioned for BRI or not.

The development of DSL, like numerous other types of connection, can be traced back to Claude Shannon's seminal 1948 paper: A Mathematical Theory of Communication. Employees at Bellcore (now Telcordia Technologies) evolved ADSL in 1988 by putting wide-band digital pointers overhead the living baseband analog voice pointer conveyed between phone businesses centered agencies and clients on accepted rotated two twisted cords ...