Where To Go Next - Cisco Catalyst 2975 Hardware Installation Manual

Where to Go Next

Caution Noncompliant cabling or powered devices can cause a PoE port fault. Use only standard-compliant
cabling to connect Cisco prestandard IP Phones and wireless access points or IEEE 802.3af-compliant
devices. You must remove any cable or device that causes a PoE fault.
Step 3 Reconfigure and reboot the connected device if needed.
Repeat Steps 1 through 3 to connect each device.
Step 4
Many legacy powered devices, including older Cisco IP phones and access points that do not fully
Note
support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.
The autonegotiation and the automatic medium-dependent interface crossover (auto-MDIX) features are
enabled by default on the switch.
With autonegotiation, the switch ports configure themselves to operate at the speed of the attached
device. If the attached device does not support autonegotiation, you can set the switch port speed and
duplex parameters.
With auto-MDIX, the switch detects the required cable type for copper Ethernet connections and
configures the interface accordingly. If auto-MDIX is disabled, use
See the
Table 2-1
Device
Switch to switch
Switch to hub
Switch to computer or server
Switch to router
Switch to IP phone
1. 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or
Where to Go Next
You can use the switch default configuration, or use any of the management options described in the
"Management Options"
Catalyst 2975 Switch Hardware Installation Guide
2-20
"Cables and Adapters" section on page B-3
Recommended Ethernet Cables (When Auto-MDIX is Disabled)
Category 6 cable. 10BASE-T traffic can use Category 3 or Category 4 cable.
section to change the switch settings.
for cable-pinout descriptions.
1
Crossover Cable Straight-Through Cable
Yes No
Yes No
No Yes
No Yes
No Yes
Chapter 2 Switch Installation
Table 2-1 to select the correct cable.
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