LANCOM 3850 UMTS
Chapter 2: Installation
26
EN
Please observe the following notice:
The settings 'Ignore' or 'Boot
only' makes it impossible to reset the configuration to the factory set-
tings. If the password is lost for a device with this setting, then there
is no way to access the configuration! In this case the serial commu-
Power-over- Ethernet – elegant power supply through the LAN wiring
LANCOM Router base stations are prepared for the PoE power supply (Power-over-Ethernet),
corresponding to the 802.3af standard. PoE-enabled network devices can be comfortably
supplied with power feeding through the LAN wiring. A separate external power supply for
each base station is unnecessary, which reduces the installation complexity considerably.
The power feeding into the LAN happens at a central position, either via a PoE power injector,
or via a so-called powerhub/powerswitch. For the LAN wiring is to note that all 8 wires must
be available by the cabling. PoE feeds the power over those four wires, which are normally
not used for data transfer.
The PoE supply works only in such
network segments, in which exclu-
sively PoE-capable devices are oper-
ating. The protection of network
devices without PoE support is guar-
anteed by an intelligent mechanism,
that tests the network segment for
devices without PoE support before
starting the PoE power feeding. The
power is only switched onto the seg-
ment, if only devices with PoE sup-
port were detected.
In a PoE installation use
exclusively devices which
correspond to the 802.3af
standard! For damages
caused by inadmissible
devices no warranty may be
claimed.
For the LANCOM 3850 UMTS, two LAN sockets can be used for redundant power
supply. The device itself selects the power source to be used. If a power outage causes
a switch between power sources, the device reboots so that the power feed is reac-
tivated, if appropriate.
Power Injector
Hub/Switch
Installation of single devices
LAN with power
Installation of several devices
LAN without power
