Cisco Systems N55M4Q manual Connecting to the PoE Ports, Device Crossover Cable

Chapter 2 Switch Installation

Connecting Devices to the Ethernet Ports

Figure 2-36 Connecting to an Ethernet Port

		Catalyst
5		2960-C	Series
	6
	7
	8
	1
	2

PD

208915

Table 2-1	Ethernet Cables (Auto-MDIX Disabled)
Device		Crossover Cable1	Straight-Through Cable1
Switch to switch		Yes	No
Switch to hub		Yes	No
Switch to computer or server		No	Yes
Switch to router		No	Yes
Switch to IP phone		No	Yes

1.100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5, Category 5e, or Category 6 cable. 10BASE-T traffic uses Category 3 or Category 4 cable.

Connecting to the PoE Ports

The 10/100 PoE ports have the same autonegotiation settings and cabling requirements as those in the “Connecting to the 10/100 and 10/100/1000 Ports” section on page 2-33. These ports provide PoE power.

See the e “PoE Ports (Switches with PoE Ports)” section on page 1-5for information on the cables and connectors.

The ports provide PoE support for 802.3af-compliant devices and also provide Cisco prestandard PoE support for Cisco IP Phones and Cisco Aironet Access Points.

On a per-port basis, you can control whether or not a port automatically provides power to a connected IP phone or an access point.

To access an advanced PoE planning tool, use the Cisco Power Calculator on Cisco.com:

http://tools.cisco.com/20/launch.jsp

You can use this application to calculate the power supply requirements for a specific PoE configuration. The results show output current, output power, and heat dissipation.

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

	Catalyst 3560-C and 2960-C Switch Hardware Installation Guide
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