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.
To access an advanced PoE planning tool, use the Cisco Power Calculator available on Cisco.com at this
URL: http://tools.cisco.com/cpc/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 system heat dissipation.
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
Warning
Category 5e and Category 6 cables can store high levels of static electricity. Always ground the cables to a
suitable and safe earth ground before connecting them to the switch or other devices.
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, IEEE 802.3af, or 802.3at (PoE+) compliant
devices. You must remove any cable or device that causes a PoE fault.
Caution
Procedure
Step 1 Connect one end of the cable to the switch PoE port.
Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on when
both devices have established link.
The port LED is amber while STP discovers the topology and searches for loops. This process takes about
30 seconds, and then the port LED turns green. If the LED is off, the other device might not be turned on,
there might be a cable problem, or there might be a problem with the adapter in the other device.
Step 3 Reconfigure and reboot the connected device, if needed.
Step 4 Repeat Steps 1 through 3 to connect each device.
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.
Note
Cisco Catalyst 1000 Series 8-Port and 16-Port Switch Hardware Installation Guide
38
Switch Installation
10/100/1000 PoE and PoE+Port Connections
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