User Manual

The 802.11B WLAN provides access to a wired LAN for wireless workstations.An integrated wireless and wired
LAN is called an Infrastructure configuration. A group of 802.11B WLAN PC users and an Access Point compose a
Basic Service Set (BSS).Each 802.11B WLAN can talk to any computer in the wired LAN infrastructure via the
Access Point.
An Infrastructure configuration extends the accessibility of a 802.11B WLAN equipped PC to a wired LAN and
doubles the effective wireless transmission range for 2 802.11B WLAN PCs. Since the Access Point is able to
forward data within its BSS, the effective transmission range in an infrastucture LAN is doubled.
Ad-Hoc
Infrastructure
Access Point
Notebook with
T60L198/T60L244
Notebook with
T60L198/T60L244
Notebook with
T60L198/T60L244
Notebook with
T60L198/T60L244
Fig 3 The effective transmission ranges
2-2 Roaming
Infrastructure mode also supports roaming capabilities for mobile users More than one BSS can be configured
as an Extended Service Set (ESS). The continuous network allows users to roam freely within an ESS. All 802.11B
WLAN PCs and Access Point within one ESS must be configured with the same ESSID and use the same radio
channel.