After reading this chapter, you should be able to perform the following tasks:
• Describe the characteristics and historical evolution of unified communications networks, the three operational modes of gateways, their functions, and the related call leg types.
• Explain how gateways route calls and which configuration elements relate to incoming and outgoing call legs.
• Describe how to connect a gateway to traditional voice circuits using analog and digital interfaces.
• Define DSPs and codecs, and explain different codec complexities and their usage.
Cisco Unified Communications gateways play an important role in the Cisco Unified Communications environment. Their primary function is to convert voice formats, ...