3Com 3CRWDR300A-73, User Manual

Page: 141 / 182

Wireless Networking 139
Wireless
Networking
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Ensure that you have an 802.11b or 802.11g or 802.11n wireless
adapter for each wireless computer, and that it is correctly installed
and configured. Verify that each wireless computer has either
Windows 98 or higher or MAC OS 8.5 or higher.
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Verify that your wireless computers are configured to work in
Infrastructure mode and not Ad Hoc mode. The Router contains an
access point that is designed to operate in Infrastructure mode. Note
that Ad Hoc mode is not supported by the Router.
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If you have a wired and a wireless NIC in the same computer, ensure
that the wired NIC is disabled.
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Check the status of the WLAN LED, it should be lit if wireless is
enabled and will flash when there is wireless activity. If not lit, go to
Wireless Settings on page 57 and enable wireless networking.
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Ensure that the TCP/IP settings for all devices are correct.
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Ensure that the Wireless Clients are using the same SSID or Service
Area Name as the Router. The SSID is case-sensitive.
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Ensure that the encryption method and level that you use on your
clients are the same as those configured on the Router. The Router
cannot simultaneously support WPA and WEP encryption.
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Ensure that you have the wireless computer enabled in the list of
allowed MAC addresses if you are using MAC Address Filtering on the
Router.
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If you are having difficulty connecting or are operating at a low speed
try changing the antenna positions on the rear of the Router.
For more effective coverage you can try reorientating your antennae.
Place one antenna vertically and one horizontally to improve coverage.
Additionally consider moving the wireless computer closer to the
Router to confirm that the building structure or fittings are not
adversely affecting the connectivity. If this resolves the problem
consider relocating the wireless computer or the Router, or trying a
different channel on the Router.
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Sources of interference: The 2.4Ghz ISM band is used for 802.11b,
802.11g, and 802.11n. This is generally a licence free band for low
power applications, and you may have other devices at your location
that operate in this frequency band. You should take care to ensure
that there are no devices, like microwave ovens for example, close to
the Router or wireless computers as this could affect receiver
sensitivity and reduce the performance of your network. If you are