Cisco Catalyst 2960-48PST Guide d'installation télécharger pdf (Page 23)

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Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Chapter 1 Product Overview

Front Panel Description

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You also can connect a Cisco IP Phone or Cisco Aironet Access Point to a Catalyst 2960 PoE 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 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 configuring and monitoring PoE ports, see the switch software

configuration guide. For information about Cisco IP Phones and Cisco Aironet Access Points, see the

documentation that came with your IP phone or access point.

Many legacy powered devices, including older Cisco IP phones and access points that do not fully

support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.

SFP Module Slots

The Catalyst 2960 switches (other than those listed) use Gigabit Ethernet SFP modules for Gigabit

uplink connections and 100-Megabit SFP modules for 100-Megabit connections to establish fiber-optic

connections. These Catalyst 2960 switches do not have an SFP module slot:

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Catalyst 2960PD-8TT-L

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Catalyst 2960-24LT-L

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Catalyst 2960-24-S

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Catalyst 2960-24TT-L

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Catalyst 2960-48TT-L

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Catalyst 2960-48TT-S

The transceiver modules are field-replaceable, providing the uplink interfaces when you insert an

SFP module. You can use the SFP modules for Gigabit uplink connections to other switches. You use

fiber-optic cables with LC connectors to connect to a fiber-optic SFP module. You use Category 5 or

higher cable with RJ-45 connectors to connect to a copper SFP module.

For more information about these SFP modules, see your SFP module documentation or the release notes

for your switch software. For more information about cabling requirements, see Appendix B,

“Connector and Cable Specifications.”

Dual-Purpose Port

You can configure a dual-purpose port as either a 10/100/1000 port or as an SFP module port. Each port

is considered as a single interface with dual front ends—an RJ-45 connector and an SFP module

connector. The dual front ends are not redundant interfaces. The switch activates only one connector of

the pair at a time.

By default, the switch dynamically selects the interface type that first links up. However, you can use the

media-type interface configuration command to manually select the RJ-45 connector or the

SFP module connector. For information about configuring speed and duplex settings for a dual-purpose

uplink, see the software configuration guide.

Each uplink port has two LEDs: one shows the status of the RJ-45 port, and one shows the status of the

SFP module port. The port LED is on the active connector.

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Cisco Catalyst 2960-48PST Guide d'installation Page 23

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