Voice over IP Fundamentals

Chapter 5. VoIP Fundamentals After reading this chapter, you should be able to perform the following tasks: Describe how key VoIP technologies overcome data network challenges to provide cost-efficient and feature-rich voice-enabled netw...

Understanding VoIP Requirements The increased efficiency of IP networks and the ability to statistically multiplex voice traffic with data packets allows companies to maximize their return on investment (ROI) in data network infrastructures. Decre...

VoIP Network Architectures One benefit of VoIP technology is that it allows networks to be built using either a centralized or a distributed architecture. Corporate business requirements dictate the architecture and functionality that is required....

Building Scalable Dial Plans To integrate VoIP networks into existing voice networks, network administrators must have the skills and knowledge to implement a scalable numbering plan and a comprehensive, scalable, and logical dial plan. This secti...

Scalable Dial Plans The North American telephone network is designed around a ten-digit numbering plan that consists of three-digit area codes and seven-digit telephone numbers, as shown in Figure 5-13. For telephone numbers that are located withi...

Summary VoIP networks leverage multiple protocols, and this chapter introduced such protocols as H.323, MGCP, SIP, RTP, and RTCP. VoIP components can be deployed using one of several call-processing models, such as a centralized call-processing mo...

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 functions does a gatew...

Lab Exercise: RTP Header Compression In this lab, you will configure routers R1 and R2, which are shown in Figure 5-33, for RTP header compression (cRTP) and compare bandwidth usage before and after enabling cRTP. Figure 5-33. Lab Topology ...

Scalable Dial Plan Attributes When designing a large-scale dial plan, Cisco recommends you adhere to the following attributes: Logic distribution Good dial plan architecture relies on the effective distribution of the dial plan logic among the ...

Practice Scenario 3: Span Engineering Dial Plan Worksheet Following is a list of specifications for the Span Engineering dial plan: The Cicero Campus number ranges are 708-555-1xxx, 708-555-2xxx, and 708-555-3xxx.The Cicero Campus site-access c...

Practice Scenario 3: Solution Table 5-6 shows the solution for Practice Scenario 3. Table 5-6. Solution: Span Engineering Dial PlanCall InformationNumber DialedNumber Sent to Remote Gateway Through WANNumber Sent to PSTNCicero caller calls Dall...