Introduction to IP Telephony 2nd Edition, Why and How Companies are Upgrading Private Telephone Systems to use VoIP Services
This book explains setup new IP Telephony systems and how to convert existing (legacy) telephone systems from dedicated telephone systems (such as proprietary PBX) to more standard IP telephony systems. The different types of IP Telephony systems including IP PBX, IP Centrex and Internet Telephone systems are described. You will learn the key functional parts of
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