Chapter 2. Analog and Digital Voice Connections

After reading this chapter, you should be able to perform the following tasks:

• Select the appropriate analog voice connection for a Cisco device

• Choose a voice compression scheme that best suits your needs

• Describe the appropriate signaling method to deploy in a telephony system

• Implement an effective method of transporting fax and modem traffic over a VoIP network

Cisco voice devices must support a wide variety of connection types. This chapter describes the various analog and digital connections, describes common compression schemes, and concludes with a description of fax-over-IP and modem-over-IP voice networks.

Upon completing this chapter, you will be able to explain the processes and standards for voice digitization, compression, digital signaling, and fax/modem transport as they relate to Voice over IP (VoIP) networks.