Date Added: May 2013
Voice over IP (VoIP) has had a strong effect on global communications by allowing human voice and fax information to travel over existing packet data networks along with traditional data packets. The convergence of voice and data in the same network brings both benefits and constraints to users. Among the several issues that need to be addressed when deploying this technology, voice quality is one of the most critical. In this paper, the authors had given an overview of various technologies to reduce the noise from voice.