THE FOLLOWING CCNA VOICE EXAM OBJECTIVES ARE COVERED IN THIS CHAPTER:
Describe PSTN components and technologies.
Describe the services provided by the PSTN.
Describe time division and statistical multiplexing.
Describe supervisory, informational, and address signaling.
Describe numbering plans.
Describe analog circuits.
Describe digital voice circuits.
Describe PBX, trunk lines, key-systems, and tie lines.
Describe VoIP components and technologies.
Describe the process of voice packetization.
Describe the components of the Cisco Unified Communications Architecture.
Describe the function of auto attendants and IVRs in a UC environment.
We'll first discuss analog signaling and the different signaling functions each type performs. ...