Siemens gigaset SE551 - Manual (Page 11)

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The Gigaset SE551 WLAN dsl/cable
Gigaset SE551 WLAN dsl/cable / deutsch / A31008-M1029-B101-1-19 / introduction.fm / 25.10.2006
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Wireless local network (WLAN)
In a wireless local network (WLAN) PCs are linked without wires. For this the PCs
have to be equipped with a wireless network adapter (WLAN adapter) such as a
Gigaset PC Card 108 or a USB Adapter 108.
We generally differentiate between two types of wireless network:
u Infrastructure mode
u Ad-hoc mode
Infrastructure mode
The infrastructure mode connects wireless and wired networks with one another. In
addition to the mobile stations, the infrastructure mode needs an access point such as
the Gigaset SE551 WLAN dsl/cable. In infrastructure mode the stations in the network
always communicate via this access point. Each station that wants to be part of the wire-
less network must first register with the access point before it can exchange data.
The access point establishes the connection between the mobile stations of a wireless
network and a wired LAN (Ethernet) or the Internet. In this case this is described as the
device's router functionality. The router sends data packets that are not addressed to sta-
tions within the network "outside" and forwards data packets originating from "outside"
to the appropriate station within the network.
You can use the Gigaset SE551 WLAN dsl/cable to connect
u wirelessly networked PCs to the Internet and
u wirelessly networked PCs to an Ethernet network.
Infrastructure mode is the default configuration of the Gigaset SE551 WLAN dsl/cable.
This configuration is described in the quick guide enclosed with the router.
Ad-hoc mode
An ad-hoc network is a wireless network set up without an access point or router.
The mobile network components that communicate with each other directly and with-
out wire connections form the network "ad-hoc", i.e. as and when required. All the
stations in the network have the same rights. Ad-hoc networks are used wherever
communications networks have to be set up quickly and without any existing network
infrastructure, and where the participants are on the move.