ECS4100 Series Web Management Guide-R07

Table Of Contents
Chapter 13
| Basic Administration Protocols
Power over Ethernet
– 421 –
Web Interface
To set the overall PoE power budget for switch:
1. Click Administration, PoE.
2. Select Configure Global from the Step list.
3. Set the maximum PoE power allocated to the switch.
4. Click Apply.
Figure 259: Setting the Switch’s PoE Budget
Setting The Port PoE
Power Budget
Use the Administration > PoE (Configure Interface) page to set the PoE power
allocation priority and maximum power provided to a port.
Command Usage
This switch supports both the IEEE 802.3af PoE and IEEE 802.3at-2009 PoE Plus
standards. To ensure that the correct power is supplied to powered devices
(PD) compliant with these standards, the first detection pulse from the switch is
based on 802.3af to which the 802.3af PDs will respond normally. It then sends
a second PoE Plus pulse that causes an 802.3at PD to respond as a Class 4
device and draw Class 4 current. Afterwards, the switch exchanges information
with the PD such as duty-cycle, peak and average power needs.
The total PoE power delivered by all ports cannot exceed the maximum power
budget of 180W. All the RJ-45 ports support both the IEEE 802.3af and IEEE
802.3at standards. The maximum number of ports which can supply power
simultaneously at the specified levels are shown in the following table.
Table 26: Maximum Number of Ports Providing Simultaneous Power
Switch 30W (802.3af) 7.5W (802.3af)
ECS4100-12PH 5 8
ECS4100-28P 5 12
ECS4100-52P 11 24