Basic Components of Telephony Networks

A number of components must be in place for an end-to-end call to succeed. These components are listed here and shown in Figure 1-1:

  • Edge devices

  • Local loops

  • Private or central office (CO) switches

  • Trunks

Figure 1-1. Basic Components of a Telephony Network

The next sections describe each of the basic components in more detail.

Edge Devices

The two types of edge devices used in a telephony network include:

  • Analog telephones— Analog telephones are most common in home, small office/home office (SOHO), and small business environments. A direct connection to the public switched telephone ...

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