Configuring Power over Ethernet

The device supports Power over Ethernet (PoE) according to the IEEE 802.3af-2003 and IEEE 802.3at standards, providing power on the Ethernet lines through all the Ethernet LAN ports. The ports can transfer electrical power, along with the usual data, over the Ethernet cable to connected equipment (e.g., IP phones) that are capable of receiving PoE.

The LAN ports automatically detect the presence of IEEE 802.3 compliant equipment. Upon plugging in a PoE client to one of the ports, the device also automatically detects the class to which the client belongs and consequently, the maximum power allowed:

■

IEEE 802.3af-2003: The device can supply up to 15.4W per port, and a total budget of 50W or 120W (depending on model) for all ports:

●

Class 0: configurable, up to 15.4W

●

Class 1: up to 4W

●

Class 2: up to 7W

●

Class 3: up to 15.4W

■

IEEE 802.3at – Class 4: The device can supply up to 30W per port to the connected equipment and a total budget of 50W, 120W, or 200W (depending on model) for all ports.

PoE is supplied on Pins 4,5: (+), pins 7,8: (-).

You can enable PoE per port and set the maximum port power consumption (up to 15.4W) when the plugged-in client is detected as Class 0. If the plugged-in client is detected as Class 0, the device saves the user-defined wattage from the total wattage budget (i.e., 15.4W). If the plugged-in client is detected as Class 1, Class 2, or Class 3, the device saves 4W, 7W, or 15.4W respectively from the total wattage budget. If the power budget has been exhausted and a new client is plugged in, power is unavailable to this client. You can also enable Class 4 PoE per port.

●

PoE is a customer ordered feature.

●

Upon device startup, PoE is enabled on all LAN ports.

●

The power is always taken off the total budget according to the class detected, regardless of what is actually consumed per port.

●

For PoE support, the maximum cable length between the device's Ethernet port and the connected equipment (e.g., IP phone) is 100 meters.

The following procedure describes how to configure PoE through the Web interface. You can also configure it through ini file [POETable] or CLI (configure system > poe).

➢

To configure PoE:

Open the Power Over Ethernet Settings page (Setup menu > IP Network tab > Advanced folder > Power over Ethernet Settings).

Select the 'Index' radio button corresponding to the required LAN port.

Click the Edit button.

From the 'Port Enable' drop-down list, select whether you want to enable or disable PoE.

In the 'Max Power' field, enter the required maximum power consumption for the port.

From the 'AT Enable' drop-down list, select whether you want to enable PoE according to IEEE 802.3at.

Click Apply.