3Com AirConnect User Manual - page 47

Special Configuration Considerations

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5 Click Clear Entry if you decide to remove a wireless client from disallowed status 

with the AP.

6 Repeat step 4 for as many wireless clients as you wish.

7 Click Security Home Page when you have completed your entry on this page.

Enabling or Disabling Encryption

The encryption configuration requirements are as follows:

■

The encryption level (open, 40-bit, or 128-bit) must be the same on the 

wireless client and the access point.

■

All Shared Keys on the wireless client must be the same as those on the access 

point with which the client will associate. They must match exactly (key order 

and hex-digit sequence).

■

The selected keys do not need to be the same among different clients and/or 

access points.

1 Select Configuration-->Security.

2 Select Enabled for WEP (Privacy) to turn on encryption or Disabled for no 

encryption.

3 If you have enabled encryption, select 40 bit key or 128 bit key or 40 bit key for 

WEP Algorithm.

4 Click Save Settings when you have completed your entry on this page. You will 

need to reset the AP using the Special Functions screen to have your encryption 

settings take effect. Refer to Reset AP in the table on page 54 in the Special 

Functions section.

Encryption Upgrade

Access Codes

If you are upgrading the wireless client from 40-bit encryption to 128-bit 

encryption, you must enter an access code to perform the upgrade. Until the 

access code is entered, you can only enable or disable 40-bit encryption.

An access code for upgrading to 128-bit encryption can only be done using the 

ASCII user interface (Hyperterminal or similar UI). Refer to Chapter 6, Configuring 

the AP Using the ASCII Interface for instructions.

Special Configuration 

Considerations

The following configuration settings are recommended for optimal performance.

Disable Short Preamble

If you are installing the access point in a network that includes earlier versions of 

3Com access points, you must disable the short RF preamble (default is enabled).

To disable short RF preamble:

1 Select Configuration in the left-hand frame of the Web page window.

2 Under Configuration, select RF. The RF Setup Web page appears

3 For the Short RF Preamble setting, click Disabled.

4 Click the Save Settings button to save your selection.

5 Reset the AP as described in the table on page 54 under “Special Functions” for 

your settings to take effect.