VoIP communication quality and flow volume preference — A SIP and Red5 example

In this modern era, communication through internet is popular. Business exchange on internet phone is thriving. However, current internet phones in the market do not guarantee voice quality. The purpose of this paper is to ascertain the effectiveness of different internet voice packet techniques towards voice quality and to select the technique that is more reliable and to realize closer to the original sound quality. Surveys were conducted Quality of Service for comparison of SIP and Red5 flow, and on voice quality acceptance level of the general public. The study concluded that: (1) while Red5 internet phone has higher transmission quality and occupying less web band, its voice quality is undesirable; (2) although SIP internet phone occupies larger band and its packets drops easily, voice quality is higher than Red5.