The Internet’s phenomenal growth, worldwide coverage and increasing data delivery capabilities have made possible its use as an alternative communications medium for real-time voice messages. In addition, using the Internet for voice communication circumvents the high costs of long-distance phone rates. However, the Internet is a relatively harsh environment for real-time voice communication. P...

Voice over Internet Protocol is a rapid growing technology which enables the transport of voice data over Internet Protocol based networks. Voice over Internet Protocol has become a possible alternative to Public Switched Telephone Network due to its capabilities to transport voice data in the form of digital Internet Protocol packets over the TCP/IP based Internet. In parallel, a remarkable in...

Voice over IP (VoIP) service has been widely deployed over the prevalent Internet due to the advanced technologies of digital voice compression, communication protocols, and wired/wireless networks. VoIP then benefitmuch lower cost of equipment, operation, and better integrationwith data applications than voice communications over telephony networks. On the other hand, VoIP further introduce se...

While Internet Telephony (IP Telephony) encompasses many different architectures and services, the key idea is the transport of real-time voice traffic over the Internet. IP Telephony architecture [2] allows the entire end-to-end path or a portion thereof to be routed over the Internet. The endpoints are regular personal computers (PCs) that are equipped with IP Telephony software which allows ...