Practical analysis of voice quality problems of Voice over Internet Protocol (VoIP).

The reasons why Voice over Internet Protocol (VoIP) technology is usually adopted by many individuals and enterprises are nothing but cost reduction. However, this reduction in cost of telephone conversation is not without a price which is the quality of the voice in adopting this technology for communication. A good number of factors affect voice quality over the internet of which three are more pronounced than the others. These three factors that are typically creating voice quality problems over the internet are jitter, delay and packet loss. The purpose of this thesis was to experimentally analyze voice quality problems of VoIP. In analyzing these problems, quantitative research methodology was applied using IP Traffic Generator and NetDisturb which are products of ZTI technologies, a company based in France and Wireshark traffic analyzer, for data gathering. The results obtained from the analysis of data gathered revealed how the main factors that are jitter, delay and packet loss affect voice quality in VoIP system. The findings also showed the relationships among these factors as well as their relationship with bandwidth. This thesis significance was the inter-relationship that was established among the factors that are affecting voice quality when voice traffic is being conveyed over the internet