The Study of Telephony based on Real Time Protocol

Abstract

The computer telephony gateway (or called internet telephony gateway)is the bridge between telecommunication and internet. Usually using a computer added a telephony interface card becomes a computer telephony gateway. The paper first offers two architecture of the internet telephony gateway using modems,a sound card and a network interface card that every personal computer already has. With the internet telephony software "SpeakFreely" we experimented and found out that the packet loss took place in insufficient bandwidth and the spike took place in network jam. The paper issued an algorithm for detection and solution of the spike or bandwidth insufficiency. With such algorithm to improve the voice quality of internet telephony.