This chapter provides a high-level overview of legacy networks and the Cisco Architecture for Voice, Video and Integrated Data (AVVID), including its components, underlying protocols, and technologies.
This chapter covers the following topics:
Legacy voice and data networks and next-generation multiservice networks
Signaling and transport protocols that are used to build Cisco IP telephony (IPT) networks
IPT components, applications, and terms used in Cisco IPT solutions
Components, applications, and terms used in Cisco IPT solutions
Cisco IPT deployment architectures and the criteria used to choose the deployment model
How various IPT components and protocols work together, including a look at various ...