
Description
2.7 Power over Ethernet (PoE)
SCALANCE W770/W730 to IEEE 802.11n Web Based Management
24 Configuration Manual, 11/2014, C79000-G8976-C323-03
A reconfiguration is necessary if you use functions based on MAC addresses.
Note
In terms of the PLUG, the SCALANCE devices work in two modes:
The device stores the configuration in internal memory. This mode is active when no
PLUG is inserted.
The configuration stored on the PLUG is displayed over the user interfaces. If changes
are made to the configuration, the device stores the configuration directly on the PLUG
and in the internal memory. This mode is active as soon as a PLUG is inserted. As soon
as the device is started with a PLUG inserted, the SCALANCE W700 starts up with the
configuration data on the PLUG.
Note
Incompatibility with previous versions with PLUG inserted
During the installation of a previous version of the firmware, the configuration data can be
lost. In this case, the device starts up with the factory settings after the firmware has been
installed. In this
situation, if a PLUG is inserted in the device, following the restart, this has
the status "NOT ACCEPTED" since the PLUG still has the configuration data of the previous
more up
-to-date firmware. This allows you to return to the previous, more up-to-date
irmware without any loss of configuration data. If the original configuration on the PLUG is
no longer required, the PLUG can be deleted or rewritten manually using "System > PLUG".
License information on the KEY-PLUG
In addition to the configuration, the KEY-PLUG also contains a license that allows the use of
the iFeatures.
Power over Ethernet (PoE)
General
"Power over Ethernet" (PoE) is a power supply technique for network components according
to IEEE 802.3af or IEEE 802.3at. The power is supplied over the Ethernet cables that
connect the individual network components together. This makes an additional power cable
unnecessary. PoE can be used with all PoE-compliant network components that require little
power (max. 12.95 W).
Which Ethernet connectors of a device are capable of PoE can be found in the operating
instructions of the relevant device.
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