Chapter 4

Road Map to VoIP Transports and Services

In This Chapter

bullet Recognizing the abstract world of CSIs

bullet Understanding transports

bullet Uncovering the five carrier service infrastructures

bullet Fitting VoIP and the Net in the CSI structure

Let’s face it — telecommunications can be daunting to those who have not given much thought as to how their voice gets from their phone’s handset to their Aunt Matilda in Dubuque. Be that as it may, the technology between you and Aunt Matilda is simply amazing.

This chapter introduces you to the wonderful world of networks, transports, and transport services. Here you discover what a CSI is (besides a great family of television shows) and why you should even care. Before you are finished with this chapter, you’ll have a good grasp of things you didn’t even know you needed to grasp. (Spooky, huh?)

This chapter lays the groundwork for Chapters 5 through 8. Here you find the conceptual framework that lets you make sense of different ways of transmitting data, such as broadband, dedicated lines, and cable. You also discover why packet-switched communications ...

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