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Traditionally the difference between telephone and data networks has been quite sharply demarcated. Since a telephone call is characterized by a set up time that is negligible compared with the call duration, it makes sense to allocate it into an end-to-end circuit. On the other hand, data transmission has to be routed on a packet-by-packet basis to be cost effective. Historically, telephone calls were injected into circuits at the edge of the network, while data traffic was sent to an IP router towards a packet switched architecture. Today this natural separation has been blurred by the convergence of many heterogeneous applications into the Internet network.

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Format:PDFSize:83 KB
Date:Aug 2007
Pages:3

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