Chapter 14. IP Telephony

This chapter covers the following topics that you need to master for the CCNP SWITCH exam:

Power over Ethernet (PoE)—This section discusses how a Catalyst switch can provide power to operate devices such as Cisco IP Phones.

Voice VLANs—This section explains how voice traffic can be carried over the links between an IP Phone and a Catalyst switch.

Voice QoS—This section provides an overview of the mechanisms that provide premium quality of service (QoS) for voice traffic.

In addition to carrying regular data, switched campus networks can carry packets that are related to telephone calls. Voice over IP (VoIP), otherwise known as IP telephony (IPT), uses IP Phones that are connected to switched Ethernet ports.

To properly ...

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