Chapter 17. Voice Networks

The following topics are covered in this chapter:

• Voice Network Access

• ANI

• Lines and Trunks

Voice switching and routing within a telecommunications network is based upon the automatic number identification (ANI). ANIs are constructed in accordance with the North American Numbering Plan (NANP), which you can find more information on at www.nanpa.com.

Before a network can rout a call, that network must first receive it, either through dedicated or switched access.

This chapter discusses the fundamental components of the Public Switched Telephone Network (PSTN) from a customer application point-of-view, such as network access and dial plans.