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The IUP Journal of Telecommunications

Setting Up a VoIP Phone System Using Open Source Tools

Article Details

Pub. Date	: Aug' 2023
Product Name	: The IUP Journal of Telecommunications
Product Type	: Article
Product Code	: IJTC010823
Author Name	: G P D Chamoth Madushan Jayasekara
Availability	: YES
Subject/Domain	: Arts & Humanities
Download Format	: PDF Format
No. of Pages	: 29

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Abstract

Voice over Internet Protocol (VoIP) is simply the transport of voice traffic over the Internet or any IP-based packet-switched network. This is in contrast with the traditional telephone network, carrying voice data over dedicated circuit-switched transmission lines. A major challenge to implementing VoIP is to ensure sufficient bandwidth, and access to the available bandwidth is controlled and prioritized. Sufficient bandwidth is required to maintain highquality voice. On the other hand, controlling it limits bandwidth-hogging applications and guarantees access to delay-sensitive applications. The objective of this paper is to familiarize the readers with building a test VoIP lab setup using open-source tools; experimenting how different network impairments would affect VoIP quality; and explaining the lab setup activities, investigations, data analysis and research. Subsequently, the paper gives an overview of various technicalities such as operating system, servers, codec selection, signaling protocols, etc. involved in achieving network quality-of-service.

Introduction

Voice over Internet Protocol (VoIP) is a technology that enables voice communication and multimedia sessions over the Internet or other Internet Protocol (IP) networks. In simpler terms, VoIP allows to make phone calls and conduct other forms of communication using the Internet, instead of traditional analog phone lines.1 VoIP services are subject to fluctuations, and VoIP frameworks give the clients the option of selecting their own equipment. The voice calls can be made using a variety of devices, including traditional telephones, IP telephones, personal computers and mobile phones, ensuring that telephone calls are no longer limited to a single device. As a result, VoIP has made tremendous strides in the communication field. VoIP is a method of communication over the Internet. VoIP works by converting analog audio signals, such as voice into digital data packets. These packets are then transmitted