Wireless LAN – WLAN
BAT54-Rail/F..
Release
7.54
06/08
3.1
What is a Wireless LAN?
21
3 Wireless LAN – WLAN
3.1 What is a Wireless LAN?
Note: The following sections are a general description of the LCOS operating
system functions in wireless networks. The precise functions supported
by your device are described in its manual.
In this chapter we will show you briefly the technology of wireless networks.
In addition, we give you an overview of the various applications, functions
and abilities of your BAT Access Points and WLAN Router.
A Wireless LAN connects single terminals (e.g. PCs or notebooks) to a local
network (also LAN – Local Area Network). In contrast to a conventional LAN,
communication takes place via radio links rather than via network cables.
This is the reason why a Wireless LAN is also called a Wireless Local Area
Network (WLAN).
All functions of a cable-bound network are also available in a Wireless LAN:
access to files, servers, printers etc. is as possible as the connection of indi-
vidual stations to an internal mail system or to the Internet access.
The advantages of Wireless LANs are obvious: notebooks and PCs can be
set up just where they are needed. Due to Wireless LANs, problems with
missing connections or structural alterations belong to the past.
3.1.1 Standardized radio transmission by IEEE
IEEE 802.11
BAT network products comply with the IEEE 802.11 standards. These stan-
dard’s family represents an extension to the already existing IEEE standards
for LANs, of which IEEE 802.3 for Ethernet is the most popular one. Within
the IEEE 802.11 family, different standards exist for the radio transmission in
different frequency ranges and with different speeds. BAT base stations and
WLAN client adapters support according to their respective type different
standards:
D IEEE 802.11a with up to 54 Mbps transfer rate in the 5 GHz band, up to
108 Mbps in turbo mode. (complement to standard)
D IEEE 802.11b with up to 11 Mbps transfer rate in the 2,4 GHz band
D IEEE 802.11g with up to 54 Mbps transfer rate in the 2,4 GHz band, up to
108 Mbps in turbo mode. (complement to standard)
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