Chapter 15. Traditional Voice Architectures and IP Telephony Design
This chapter covers the following subjects:
The designs of enterprise voice networks are migrating from the traditional use of Private Branch Exchange (PBX) switches to the use of IP telephony architectures such as Cisco Unified CallManager. Enterprise networks now have to be designed with IP telephony in mind. This chapter reviews Public Switched Telephone Network (PSTN) and PBX voice networks, integrated IP telephony, and quality of service (QoS) for IP telephony (IPT) networks.
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