Cisco Catalyst 3560 Hardware Installation Manual page 49

Chapter 2 Product Overview
Front Panel Description
The10/100 ports on the Catalyst 3560 switches provide PoE support for devices
compliant with IEEE 802.3AF and also provide Cisco pre-standard PoE support
for Cisco IP Phones and Cisco Aironet Access Points.
Each of the Catalyst 3560-24PS switch 10/100 ports can deliver up to 15.4 W of
PoE. On the Catalyst 3560-48PS switch, any 24 of the 48 10/100 ports can deliver
15.4 W of PoE, or any combination of the 10/100 ports can deliver an average of
7.7 W of PoE at the same time, up to a maximum switch power output of 370 W.
On a per-port basis, you can control whether or not a Catalyst 3560 10/100 port
automatically provides power when an IP phone or an access point is connected.
CMS and the CLI provide two PoE settings for each 10/100 port: Auto and Never.
When you select the Auto setting, the port only provides power if a valid powered
device, such as an IEEE 802.3AF-compliant powered device, a Cisco pre-standard
IP phone, or a Cisco pre-standard Cisco access point, is connected to it. The Auto
setting is the default. However, when you select the Never setting, the port does
not provide power even if a Cisco IP phone or an access point is connected to it.
You also can connect a Cisco IP Phone or Cisco Aironet Access Point to a Catalyst
Note
3560 switch 10/100 port and to an AC power source for redundant power. The
powered device might switch to the AC power source as its primary power source
upon being connected to it. In that case, the 10/100 PoE port becomes the backup
power source for the powered device.
If the primary source fails, the second power source becomes the primary power
source to the powered device. During the power transfer, an IP Phone might
reboot or reestablish link with the switch.
For information about Cisco IP Phones and Cisco Aironet Access Points, refer to
the documentation that came with your IP phone or access point.
Catalyst 3560 Switch Hardware Installation Guide
2-5
78-16057-01