Power Over Ethernet - Nortel 4500 Series Overview-System Configuration

Power over Ethernet

The Nortel Ethernet Routing Switch 4500 Series 4550T-PWR and
4548-GT-PWR are Power Sourcing Equipment (PSE). They support Power
over Ethernet (PoE) on all 10/100/1000 ports.
PoE is based on the IEEE 802.3af standard.
PoE is the ability of the 4550T-PWR and the 4548-GT-PWR to power
network devices over the Ethernet cable. These devices include IP Phones,
wireless LAN access points, security cameras, and access control points.
The PoE features supported by the 4550T-PWR and the 4548-GT-PWR
switches are as follows:
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Copyright © 2007, Nortel Networks
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DTE power
powered device (PD) discovery and classification
capacitive detection to support legacy PD devices, including the Nortel
and Cisco Legacy IP Phones
per-port power management and monitoring
AC and DC disconnection
load under voltage/current and over voltage/current detection
at least 320 watts (W) power available for PSE ports from the internal
power supply
up to 6.6 W for each port on all 48 ports
a total of 740 W power available for PSE ports using both the internal
and external power supply
15.4 W (Max) for each port on a 48 port unit
per-port PoE status LED
port prioritizing to guarantee DTE power available on high-priority ports
port pruning to prevent system failure
Nortel Ethernet Routing Switch 4500 Series
Overview — System Configuration
NN47205-500 02.01 Standard
5.0 23 February 2007
147
Nortel Networks Confidential