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IP Telephony Using CallManager Express Lab Portfolio by Ernie Friend, Cheryl A. Schmidt

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Chapter 5.Configuring VoIP Ports

This chapter focuses on configuring Foreign Exchange Station (FXS), Foreign Exchange Office (FXO), and T1 ports for transporting voice traffic. You will use the dial peer knowledge covered in the preceding chapter and apply it to the ports configured in this chapter. A single pod (one Cisco CallManager Express [CME] router) is the focus of the lab topology.

FXS and FXO Interfaces

As a review, an FXS interface is used to connect an analog device such as a fax machine, answering machine, or modem to the network. An FXS interface supplies ring, voltage, and dial tone for basic telephone equipment and PBXs.

FXO ports, on the other hand, are analog ports that connect office equipment ...

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