User manual

FAQ
What is an Access Point (AP)?
Ans: An AP is the bridge to connect two different protocols, Ethernet 802.3 and
wireless 802.11b. It can be used as the center of a wireless infrastructure,
providing connections to your wired networks. Or, it can act as a repeater,
increasing wireless communication range. The maximum communication
range is based on how you configure your wireless infrastructure. If your
purpose is merely to transfer files between two nearby computers, you can
connect these two PCs by two WLAN cards through ad-hoc mode (explained
below) without using an AP.
What is the difference between Infrastructure mode and Ad-hoc mode?
Ans: The 802.11 standard defines two modes: infrastructure and ad-hoc. In the
infrastructure mode, the wireless network consists of at least one access point
connected to the wired network infrastructure and a set of wireless end
stations. The ad-hoc mode is a peer-to-peer LAN. It is a set of 802.11
wireless stations that communicate directly with one another without using an
access point or any connection to a wired network. This mode is useful for
quickly and easily setting up a wireless network anywhere that a wired
infrastructure does not exist or is not required for service.
What is the maximum transmission rate among WLAN cards?
Ans: In 802.11b, the maximum transmission rate is 11Mbps. It also supports
1Mbps, 2Mbps, and 5.5Mbps rates when the transmission condition is not
very good. If you have more than two wireless stations connecting on the
same channel, these stations would share the 11Mbps rate.
What is Channel Selection?
Ans: In 802.11 there is total of 14 channels within the 2.4GHz to 2.4835GHz
bandwidth. If you are working under the “ad hoc" mode, you have to assign
one of the channels. All PCs in this group should be configured to this
assigned channel so your group could form up. If you are using the
infrastructure mode, the system administrator would have set a specific
channel for the AP, and the client stations can auto detect that channel to
associate with it. In the latter case, the channel selection in the driver does
not matter.
What OS can your driver support?
Ans: Our device driver uses NDIS 3 and NDIS 5, which support Windows
98SE/M/2000 and Windows XP.
Does the radio wave emitted from WLAN card have any threat to human
health?
Ans: To date, scientific studies have been unable to attribute adverse health
effects to WLAN transmissions. As with other wireless technologies, WLANs
must meet strict government and industry standards for safety. In addition,
output power of WLAN system is limited by FCC regulations to under 100mW,
much less than that of a mobile phone.
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