In the following chapters, we will present a handful of elements to substantiate this viewpoint and investigate the regulatory consequences. As a result, the configuration of a voice gateway becomes easier and does not need modification when a new voice gateway is added to the system. The need to have for higher high quality of service (QoS) : existing data networks, and specially the Internet, fail to offer QoS that is required for mission important small business applications.
Corporations want to cut down WAN charges by migrating to integrated networks that can efficiently carry any form of information. As shown in Figure 8-22 , the True-Time Transport Protocol (RTP), which runs on prime of UDP, carries voice conversation (and video) involving two IP endpoints.
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Asynchronous Transfer Mode (ATM) Service makes use of higher speed ATM networking technologies to bundle data into fixed segments referred to as cells. Four AAL kinds are suggested by the ITU-T, each of which is suited to a certain service category and connection mode. This refers to the exchanges or signal transfer points in a network that are involved in switching data streams. Refer ATM Protocol Stack➤ which covers Asynchronous Transfer Mode Protocol layers, their sublayers and functions.