Voice over IP Fundamentals

Chapter 7. Improving and Maintaining Voice Quality After reading this chapter, you should be able to perform the following tasks: Identify problems presented by IP networks that affect voice and describe the QoS mechanisms used to addres...

Optimizing Voice Quality Because of the inherent characteristics of a converged voice and data IP network, administrators face certain challenges in delivering voice traffic correctly. This section describes these challenges and offers solutions f...

AutoQoS Cisco AutoQoS minimizes the complexity, time, and operating cost of QoS deployment. Cisco AutoQoS incorporates value-added intelligence into Cisco IOS software and Cisco Catalyst Operating System software to provision and manage large-scal...

Implementing Call Admission Control To prevent oversubscription of VoIP networks, the number of voice calls allowed on the network must be limited. This section describes the configuration parameters for implementing CAC, which can prevent oversub...

Summary This chapter introduced the need for quality of service (QoS) in a converged network environment (that is, a network that simultaneously transports voice, data, and/or video). In the absence of QoS mechanisms, voice packets might suffer fr...

Chapter Review Questions The following questions test your knowledge of topics explained in this chapter. You can find the answers to the questions in Appendix A, "Answers to Chapter Review Questions." 1.Which two factors affect voice c...

Lab Exercise: Router AutoQoS In this lab, you will configure AutoQoS on two different router interfaces. One interface runs at a speed of 128 kbps, and the other interface runs at a speed of 2 Mbps. You will see that AutoQoS treats these interface...