Free VoIP: An In-Depth Analysis Tutorial

“>To create a proper network design, it is important to know all the caveats and inner workings of networking technology. This chapter explains many of the issues facing Voice over IP (VoIP) and ways in which Cisco addresses these issues.Communications via the Public Switched Telephone Network (PSTN) has its own set of problems, which are covered in Chapter 1, “Overview of the PSTN and Comparisons to Voice over IP,” and Chapter 2, “Enterprise Telephony Today.” VoIP technology has many 
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