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Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 1 Overview
Network Configuration Examples
For prestandard and IEEE 802.3af-compliant powered devices connected to Catalyst PoE switches, IEEE
802.1p/Q QoS gives voice traffic forwarding-priority over data traffic.
Catalyst PoE switch ports automatically detect any Cisco pre-standard and IEEE 802.3af-compliant
powered devices that are connected. Each PoE switch port provides 15.4 W of power per port. The
powered device, such as a Cisco IP Phone, can receive redundant power when it is also connected to an
AC power source. Powered devices not connected to Catalyst PoE switches must be connected to AC
power sources to receive power.
Cisco CallManager controls call processing, routing, and Cisco IP Phone features and configuration.
Users with workstations running Cisco SoftPhone software can place, receive, and control calls from
their PCs. Using Cisco IP Phones, Cisco CallManager software, and Cisco SoftPhone software integrates
telephony and IP networks, and the IP network supports both voice and data.
With the multilayer switches providing inter-VLAN routing and other network services, the routers
focus on firewall services, Network Address Translation (NAT) services, voice-over-IP (VoIP) gateway
services, and WAN and Internet access.
Figure 1-6 Catalyst 3750 Switch Stack in a Collapsed Backbone Configuration
Gigabit
servers
86929
Cisco 2600 or
3700 routers
Catalyst 3750
multilayer
StackWise
switch stack
Internet
Cisco IP
phones
Workstations
running
Cisco SoftPhone
software
Aironet wireless
access points
IP IP
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