Cisco 3524XL Hardware Installation Guide - Page 27

Chapter 1 Product Overview Front-Panel Description The 10/100 ports on the Catalyst 3512, 3524, 3524-PWR, and 3548 XL switches provide protocol support for Cisco IP Phones. The Catalyst 3548 and 3524-PWR XL switches also support per-port priority override. Refer to the Cisco IOS Desktop Switching Software Configuration Guide for more information about these features. Cisco IP Phones-connected to the 10/100 ports on the Catalyst 3512, 3524, and 3548 XL switches-must be connected to an AC power source. However, the Catalyst 3524-PWR XL 10/100 ports can: • Provide -48V DC power to the following phones: Cisco IP Phone 7960, Cisco IP Phone 7940, and Cisco IP Phone 7910 • Automatically detect if a Cisco IP Phone is connected On a per-port basis, you can control whether or not a Catalyst 3524-PWR XL 10/100 port automatically provides power when a Cisco IP Phone is connected. CMS and the CLI provide two inline power settings for each 10/100 port: Auto and Never. When you select the Auto setting for inline power on a port, the port only provides power if a Cisco IP Phone is connected to it. The Auto setting is the default. However, when you select the Never setting for inline power on a port, the port does not provide power even if a Cisco IP Phone is connected to it. You also can connect the Cisco IP Phone to a Catalyst 3524-PWR XL 10/100 port and to an AC power source for redundant power. The power source to which the Cisco IP Phone is first connected becomes its primary power source, and the second power source is its backup. If the primary source fails, the second power source becomes the primary power source to the Cisco IP Phone. During the power transfer, the phone might reboot or reestablish link with the switch. For information about Cisco IP Phones, refer to the documentation that came with your Cisco IP Phone. 78-6456-03 Catalyst 3500 Series XL Hardware Installation Guide 1-9