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Catalyst 2975 Switch Hardware Installation Guide

OL-17784-01

Chapter 1 Product Overview

Front Panel

Figure 1-1 Catalyst 2975 Switch Front Panel

10/100/1000 PoE Ports

The 10/100/1000 PoE ports use RJ-45 connectors with Ethernet pinouts. The maximum cable length is

328 feet (100 meters). The 100BASE-TX and 1000BASE-T traffic requires Category

5, Category 5e, or

Category

6 unshielded twisted pair (UTP) cable. The 10BASE-T traffic can use Category 3 or Category

4 UTP cable.

The ports provide PoE support for devices compliant with IEEE 802.3af and also provide Cisco

prestandard PoE support for Cisco IP Phones and Cisco Aironet Access Points.

The switch delivers 15.4 W of PoE on any 24 of the 48 ports, or any combination of the ports 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 port automatically provides power when an IP phone or an access

point is connected.

For more information about port connections and port specifications, see the “10/100/1000 PoE Port

Connections” section on page 2-19, and Appendix B, “Connector and Cable Specifications.”

SFP Module Slots

The switch has four Gigabit Ethernet SFP module slots. You can use any combination of these Cisco SFP

modules:

–

100BASE-FX multimode fiber (MMF)

–

1000BASE-BX

–

1000BASE-LX

–

1000BASE-SX

–

1000BASE-ZX

–

1000BASE-T

–

Coarse wavelength-division multiplexing (CWDM)

1 Mode button and switch LEDs 3 SFP module slots

2 10/100/1000 PoE ports

1. Port numbering is from left to right, with port 1 on the far left. The first member of the pair (port 1) is above

the second member (port 2). Module slot numbers are 49, 51 upper, 50, 52, lower.

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