Sony CLIE PEG-TH55 Frequently Asked Questions Manual page 34

I cannot connect to the Internet via a wireless LAN (continued)
B Your CLIÉ handheld may be accessing the target wireless LAN access point
at the channel which is also used by more than the target one.
Change to another wireless LAN access point channel.
b
For details on changing channels, refer to the manual of the wireless LAN access
point.
B The wireless LAN access point may be busy.
Wait for a short period of time and then try again.
B You may be using your CLIÉ handheld near devices that use the 2.4GHz
frequency band, such as a microwave oven or a Bluetooth
device.
Use your CLIÉ handheld away from such devices, or turn off the devices.
B If you need to know the MAC address of your CLIÉ handheld, check [MAC
Address:] in the Connect Setting screen by following the steps below.
1 Select [Network] in the Preferences screen.
2 Tap [V Service:] to select [Wireless LAN].
3 Tap [Details...].
The Wireless LAN Setup screen is displayed.
4 Tap
(Menu), then tap [ConnectionStatus...] from [Information].
The Connect Setting screen is displayed.
Tip
If the MAC address is not displayed, tap [Connect] after selecting [Wireless LAN] in step 2 (it
is OK to disconnect soon) and tap [Details...].
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compatible