Aegis Wireless Web Tablet, Руководство пользователя

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Aegis Wireless Web Tablet
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What is the data rate of 802.11b RF technology? To support very noisy environments as well as
extended range, 802.11b WLANs use dynamic rate shifting, allowing data rates to be automatically
adjusted to compensate for the changing nature of the radio channel. Ideally, users connect at the full 11
Mbps rate. However when devices move beyond the optimal range for 11 Mbps operation, or if
substantial interference is present, 802.11b devices will transmit at lower speeds, falling back to 5.5, 2,
and 1 Mbps. Likewise, if the device moves back within the range of a higher-speed transmission, the
connection will automatically speed up again. Rate shifting is a physical-layer mechanism transparent
to the user and the upper layers of the protocol stack.
What if I have more than one Web Tablet or other 802.11b clients? The number of 802.11b clients
"allowed" is dependant on the capabilities of your access point. Many access points allow up to 256
simultaneous connections. However, as on any network, performance degrades as traffic increases. It is
possible to add additional in-range 802.11b access points to share the traffic load. Consult the
documentation provided with your access point to understand its capabilities.
How do I configure a static (manual) IP address the Web Tablet? To configure a static IP address
on the Web Tablet click Start > settings > control panel > network . Select the adapter to you are
using and click the properties button. Next click the Specify an IP address radio button and enter in the
IP address, subnet mask and default gateway. It may also be necessary to input the DNS servers on the
name server tab.
Can I use a USB-based communication device with the Web Tablet? No. The Web Tablet is
currently designed only for use over the built-in wireless RF LAN for communications.
Is the wireless link secure? The wireless link used by the Web Tablet is based on the IEEE 802.11b
wireless technology. Security is a common concern among potential WLAN users. 802.11b specifies 64
bit or 128-bit encryption via wired equivalent privacy (WEP), an optional security mechanism designed
to make wireless link integrity equal to that of wired links. Note that WEP is optional, which means
some products might not use it. If you're concerned about the security of your wireless data, be sure to
choose access points and client adapters that support WEP.
How do I configure security on the Web Tablet? To configure, double tap the Wireless LAN utility
in the system task tray (The small round icon with a lightning bolt). On the configuration tab make sure
that the SSID matches the base station OS SSID (sometimes referred to as a network name) also on the
Encryption tab make sure that encryption is enabled to match the base station at 64 bit or 128 bit and
the keys match. After any changes are made to the card you must click ok then restart the Web Tablet.
What is Roaming?
When an 802.11b client such as the Web Tablet is in an environment with two or
more access points are in-range the client is responsible for choosing the most appropriate access point
based on the signal strength, network utilization and other factors. When a station determines the
existing signal is poor, it begins scanning for another access point. The station selects the most
appropriate signal and sends an association request to the new access point. If the new access point
sends an association response, the client has successfully roamed to a new access point. Periodically the
802.11b client surveys all 802.11b channels in order to assess whether a different access point would
provide it with better performance characteristics. If it determines that this is the case, it re-associates
with the new access point, tuning to the radio channel to which that access point is set.