NETGEAR WN121T User Manual

4-1
v2.0, February 2007
Chapter 4
Troubleshooting
This chapter provides information about troubleshooting your Wireless USB 2.0 Adapter. After
each problem description, instructions are given to help you diagnose and solve the problem. For
information about connecting to wireless networks and the Internet, see “Connecting to Wireless
Networks and the Internet” in Chapter 1.
Troubleshooting Tips
Use the information below to solve common problems you may encounter. Also, refer to the
knowledge base on the NETGEAR website at http://www.netgear.com/support/main.asp.
Table 4-1. Troubleshooting Tips
Problem Action
I cannot connect to an access point.
The access point is available and there is
good signal strength.
• If the access point is WPA-PSK protected, you need the
correct WPA-PSK passphrase. Otherwise, the WN121T will
still be connected to the previous access point and you will
not be able to change to the WPA-PSK access point.
• If the access point is WEP protected (either 64 or 128 bit
encryption), you will be prompted to enter the WEP
encryption security information.
How to maximize throughput. • Make sure the VPN firewall is connected to a USB port v2.0.
If connected to a v1.1 USB port it is limited to
• For best performance connect to high-speed network
equipment. See Chapter 3, “Wireless Network Performance”
for help in understanding how to get the best performance
from your VPN firewall.
The Smart Wizard keeps asking me to save
settings.
If you change the settings the Smart Wizard offers you the
chance to save the changes. To avoid this prompt, simply click
Apply before you close the Smart Wizard.
Two WN121T icons are in the system tray. You have an older software version installed on your system
and it needs to be removed. See “Removing the Software” in
Chapter 1or “Upgrading the Wireless USB 2.0 Adapter
Software” in Chapter 1.

NETGEAR WN121T Specifications

Wireless Speeds

802.11b speeds	1, 2, 5.5, 11 Mbps
802.11g speeds	6, 9, 12, 18, 24, 36, 48, 54 Mbps
802.11n draft speeds	6, 6.5, 13, 13.5, 19.5, 26, 27, 39, 40.5, 53, 54, 58.5, 65, 78, 81, 104, 108, 117, 121.5, 130, 135, 162, 216, 243, 270, 300 Mbps

Weight and Dimensions

dimensions	103.99 x 91.98 x 16 mm
weight	2.59 oz (73.6 g)