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Chapter 7: Power over Ethernet (PoE)
7.1 PoE Theory
Power-over-Ethernet (PoE) provides power to devices over existing LAN cabling, without updating or modifying the
network infrastructure. Power-over-Ethernet removes the need to place network devices next to a power source.
Examples include:
• IP Phones
• Wireless Access Points
• IP Gateways
• Cameras
• Audio remote monitoring equipment
As technology has progressed, PoE has evolved. Equipment from many manufacturers, including the Asante
IC3724PWR, supports the 802.3af standard. By default, the IC3724PWR is set to work with 802.3af compliant
devices. The 802.3af standard includes the ability to determine when a compliant Powered Device (PD) is
connected to a port. Power is only provided when a compliant device is detected. As per the standard, ports can be
set to provide different amounts of power. The IC3724PWR also includes features that allow the switch to be
configured differently to accommodate older, noncompliant equipment, using older detection methods, and to meet
special needs.
7.2 PoE Show Example To access the PoE feature, login to the switch and enter the username and
password. Next use the enable command to enter privileged mode. Once in enable mode, the show command can
be used to view the switch PoE settings. An example appears below.
Login: admin
Password: ******
COMMAND> en
Username: admin
Password: ******
Switch# show
53 Asante IC3724PWR User’s Manual