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Catalyst 3750 Switch Hardware Installation Guide
OL-6336-07
Chapter 2 Switch Installation
Connecting to the 10/100 and 10/100/1000 Ports
Step 6 Use two Phillips-head screws to attach the XENPAK module slot cover to the switch front panel, as
shown in Figure 2-54.
Figure 2-54 Replacing the XENPAK Module Slot Cover
Connecting to the 10/100 and 10/100/1000 Ports
The switch 10/100 and 10/100/1000 ports configure themselves to operate at the speed of attached
devices. If the attached ports do not support autonegotiation, you can explicitly set the speed and duplex
parameters. Connecting devices that do not autonegotiate or that have their speed and duplex parameters
manually set can reduce performance or result in no linkage.
To maximize performance, choose one of these methods for configuring the Ethernet ports:
• Let the ports autonegotiate both speed and duplex.
• Set the port speed and duplex parameters on both ends of the connection.
Warning
Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if
interconnections are made using uninsulated exposed metal contacts, conductors, or terminals.
Avoid using such interconnection methods, unless the exposed metal parts are located within a
restricted access location and users and service people who are authorized within the restricted
access location are made aware of the hazard. A restricted access area can be accessed only through
the use of a special tool, lock and key or other means of security.
Statement 1072
You can configure the 10/100 and 10/100/1000 ports on the Catalyst 3750-24PS, 3750G-24PS,
3750-48PS, 3750G-48PS, 3750G-24WS-S25, and the 3750G-24WS-S50 switches to either
automatically provide PoE when a Cisco IP Phone, Cisco Aironet Access Point, or end device compliant
with IEEE 802.3af is connected. Alternatively, you can configure them to never provide PoE, even if an
IP phone or an access point is connected. The default setting is Auto. To prevent ESD damage, follow
your normal board and component handling procedures.
Use the guidelines in Table 2-1 to select the correct cable for connecting the switch 10/100 and
10/100/1000 ports to other devices. See the “Cable and Adapter Specifications” section on page B-5 for
cable-pinout descriptions.
1 Phillips-head screw 2 Module slot cover
Catalyst 3750
series
104765
2
1
1
