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Measurement of influence of network impairments on VoIP call quality

By Martin Zelenay

Abstract

Práca skúma, analyzuje a vyhodnocuje vplyv nežiaducich faktorov v IP sieťach na prenos hlasu VoIP. Rozoberá problematiku prenosu hlasu cez paketové siete v rámci noriem a zaužívaných pravidiel. V teoretickej časti sú vysvetlené pojmy a problematika VoIP sietí, so zameraním sa na fakty, potrebné k plnému pochopeniu skúmaných dejov a meraní. V praktickej časti je zhrnutá realizácia konkrétnych testov, podľa zadania práce s orientáciou na prvotné overenie si zariadení i hodnotiacich modelov a následné meranie vplyvu javov na kvalitu hovorov, s použitím týchto zariadení a ústredne Asterisk.This work explores, analyzes and rates influence of network impairments on VoIP traffic. It describes how voice over IP is carried according to standards. There are described concepts and basics of VoIP networks with orientation on facts necessary to understand analyzed actions and measurements in theoretical part. In practical part, there is described realization of tests according to instructions with orientation on initial checking of devices and rating models and then measurement of influence of network impairments on quality of calls with use of these devices and Opensource PBX Asterisk.

Topics: VoIP, nežiadúce javy, vplyv, kvalita hovoru, meškanie, stratovosť, kolísanie paketov, kodeky, VoIP, network impairments, influence, quality of call, delay, packet loss, jitter, codecs
Publisher: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Year: 2013
OAI identifier: oai:dspace.vutbr.cz:11012/26566

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