Title: A comparative analysis of protocols for VoIP services

Authors: Maurizio D'Arienzo; Giovanni Musto

Addresses: Dipartimento di Scienze Politiche Jean Monnet, Università Della Campania 'L.Vanvitelli', Caserta, Italy ' Dipartimento di Scienze Politiche Jean Monnet, Università Della Campania 'L.Vanvitelli', Caserta, Italy

Abstract: Although the widespread of broadband network has boosted the deployment of voice over IP (VoIP) systems, most part of the telephone service is still provided on the traditional PSTN lines. It can be expected that the transition from traditional telephone to VoIP systems proceed, and that the network traffic due to the phone calls will become significant. Hence, it is still important to select the best protocols, both for traffic forwarding and for encoding to ensure the required quality. In this paper we present the results of a series of experiments to evaluate the protocols involved in VoIP service. On a laboratory testbed we reproduce a common situation of two interconnected branches and compare the performance achievable by selecting different network protocols like SIP and IAX combined with current voice codecs like G.711 and G.729.

Keywords: VoIP protocols; performance comparison; session initiation protocol; SIP; inter-asterisk exchange; IAX; codecs G.711 G.729.

DOI: 10.1504/IJCNDS.2021.113013

International Journal of Communication Networks and Distributed Systems, 2021 Vol.26 No.2, pp.159 - 175

Received: 04 Jul 2019
Accepted: 10 Jan 2020
Published online: 15 Feb 2021 *

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