CHAPTER
41-1
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
41
Configuring Voice Interfaces
This chapter describes how to configure voice interfaces for the Catalyst 4500 series switches.
This chapter includes the following major sections:
• About Voice Interfaces, page 41-1
• Configuring a Port to Connect to a Cisco 7960 IP Phone, page 41-3
• Configuring Voice Ports for Voice and Data Traffic, page 41-3
• Overriding the CoS Priority of Incoming Frames, page 41-5
• Configuring Power, page 41-5
Note For complete syntax and usage information for the switch commands used in this chapter, first look at
the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products/hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in
the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this
location:
http://www.cisco.com/en/US/products/ps6350/index.html
About Voice Interfaces
Catalyst 4500 series switches can connect to a Cisco 7960 IP Phone and carry IP voice traffic. If
necessary, the switch can supply electrical power to the circuit connecting it to the Cisco 7960 IP Phone.
Because the sound quality of an IP telephone call can deteriorate if the data is unevenly sent, the switch
uses quality of service (QoS) based on IEEE 802.1p class of service (CoS). QoS uses classification and
scheduling to transmit network traffic from the switch in a predictable manner. See Chapter 38,
“Configuring Quality of Service on Supervisor Engine 6-E and 6L-E,” for more information on QoS.
You can configure the Cisco 7960 IP Phone to forward traffic with an 802.1p priority. You can use the
CLI to configure a Catalyst 4500 series switch to honor or ignore a traffic priority assigned by a
Cisco 7960 IP Phone.
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