148
Power over Ethernet
You can configure PoE from the CLI, SNMP, and Web interfaces. For details,
see the following sections.
•
•
"Port power priority" (page 149)
•
"External power source" (page 150)
•
•
•
"Power availability" (page 151)
•
"Diagnosing and correcting PoE problems" (page 155)
•
•
"Configuring PoE using the CLI" (page 158)
•
"Viewing PoE ports using the JDM" (page 162)
•
"Configuring PoE using the JDM" (page 163)
•
"Configuring PoE using the Web-based Management Interface" (page
163)
PoE overview
The Nortel Ethernet Routing Switch 4500 Series 4550T-PWR and the
4548-GT-PWR are ideal to use with Nortel Business Communication
Manager system, IP phones, hubs, and wireless access points. You can
use these switches with all network devices.
By using the Nortel Ethernet Routing Switch 4500 Series 4550T-PWR or the
4548-GT-PWR, you can plug any IEEE802.3af-compliant powered device
into a front-panel port and receive power in that port. Data also can pass
simultaneously on that port. This capability is called PoE.
The IEEE 802.3af draft standard regulates a maximum of 15.4 W of power
for each port; that is, a power device cannot request more than 15.4 W
of power. As different network devices require different levels of power,
the overall available power budget of the Ethernet Routing Switch 4500
depends on your power configuration and the particular connected network
devices. If you connect an IP device that requires more than 16 W of power,
you see an error on that port notifying you of an overload.
The Nortel Ethernet Routing Switch 4500 Series 4550T-PWR and the
4548-GT-PWR automatically detect each IEEE 802.3af-draft-compliant
powered device attached to each front-panel port and immediately sends
power to that appliance. The switches also automatically detect how much
Nortel Ethernet Routing Switch 4500 Series
Overview — System Configuration
NN47205-500
02.01
Standard
5.0
23 February 2007
Copyright © 2007, Nortel Networks
Nortel Networks Confidential
.