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Chapter 18: Wireless Local-Area Networking
Wireless Local-Area Networking (WLAN)
185
Psion Mobile Devices Developers Guide
18.1 Wireless Local-Area Networking (WLAN)
A wireless LAN enables a device to connect to a local-area network (LAN) through a wireless radio connec-
tion. The IEEE 802.11 standards define communication protocols on WLANs. The coverage area of a WLAN is
dependant on the radio wave frequency, power output and environmental factors that may reflect or
absorb radio signals.
18.2 Supplicants
The Mobile Devices SDK enables the configuration and operation of wireless LAN network connections. A
wireless LAN connection is established and maintained through a supplicant that is provided by the radio
manufacturer. Each supplicant implements its own standards. The Mobile Devices SDK encapsulates the
functionalities of the following supplicants. You do not need to load these supplicants. They are built into
the image for the Psion computer. See Table 18.1 Availability of Supplicants on page 185 for a list of the
supplicants that are available on specific Psion computers:
•Summit
Wireless Zero Config (WZC)
Easy Wi-Fi Security (previously called Devicescape Agent [DSA])
Summit
The Summit supplicant implements secure wireless networking for Summit radios.
Wireless Zero Configuration
Wireless Zero Configuration (WZC), also known as Wireless Auto Configuration, or WLAN AutoConfig is a
wireless connection management utility included with Microsoft Windows operating systems as a service
that dynamically selects a wireless network to connect to, based on a user's preferences and various
default settings. This can be used instead of, or in the absence of, a wireless network utility from the manu-
facturer of the wireless networking device on the computer.
Wi-Fi Config
Wi-fi Config is the Psion implementation of Devicescape Agent (DSA). It is integrated into the Windows
operating systems.
The supplicants are available as follows:
Table 18.1 Availability of Supplicants
Computer Summit
DeviceScape
Agent
Zero
Config
(WZC)
Default Supplicant
753x G2 Only if RA2041
radio installed
No Yes Summit (if installed)
8525 G2 Only if RA2041
radio installed
No Yes Summit (if installed)
8530 G2 Only if RA2041
radio installed
No Yes Summit (if installed)
Workabout Pro G2 (7527) Only if RA2041
radio installed
No Yes Summit (if installed)
Workabout Pro 3 (7527) Only if RA2041
radio installed
No Yes Summit (if installed)
Ikôn (7505) Ye s No Yes Windows CE: Summit
Windows Mobile: WZC
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