User's Guide

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TRENDnet User’s Guide
TPE-3012LS / TPE-3018LS
59
PoE (Power over Ethernet)
The main advantage of PoE is that it can make installing a network easier. The selection
of a location for a network device is often limited by whether there is a power source
nearby. This constraint limits equipment placement or requires the added time and cost
of having additional electrical sources installed. However, with PoE, you can install
PoEcompatible devices wherever they are needed without having to worry about
whether there is power source nearby.
Power Sourcing Equipment (PSE)
A device that provides PoE to other network devices is referred to as
power sourcing equipment (PSE). The Gigabit Smart Surveillance PoE+ Switch is a PSE
device which provides DC power to the network cable and functions as a central power
source for other network devices.
Powered Device (PD)
A device that receives power from a PSE device is called a powered
device (PD). Examples include wireless access points, IP phones, webcams, and even
other Ethernet switches.
PD Classes PDs are grouped into five classes. The classes are based on the amount of
power that PDs require. The Gigabit Web Smart PoE+ Switch supports all five classes.
Class
Maximum Power
Output
from a Switch Port
Power Ranges of the PDs
0
15.4W
0.44W to 12.95W
1
4.0W
0.44W to 3.84W
2
7.0W
3.84W to 6.49W
3
15.4W
6.49W to 12.95W
4
34.2W
25.5W to 38.9W
Power Budget
Power budget is the maximum amount of power that the PoE switch can provide at one
time to the connected PDs. Port Prioritization As long as the total power requirements
of the PDs is less than the total available power of the switch, it can supply power to all
of the PDs.
Enable or disable PoE
PoE > PoE Enable/Disable
1. Log into your switch management page (see “Access your switch management page”
on page 11).
2. Click on PoE and click on PoE Enable/Disable.
3. By default, all PoE+ ports are configured with PoE enabled indicated by the
checkmark. To disable PoE on a specific, click the port to uncheck and click Apply to
disable PoE on the selected port. To enable PoE on the specific port, click the port to
check it and click Apply to enable PoE on the selected port.
• Nominal Power – Displays the maximum PoE power budget in watts.
• Consuming Power – Displays the current PoE power provided to PoE devices or
PDs (Powered Devices) in watts.
• Remaining Power - Indicates the port with a specific PoE status and that you
are configuring.