Symptom(s):
After upgrading the firmware in a Cisco Aironet* Access Point to version 12.3(8)JA, a STOP message (fatal system error) occurs in Microsoft Windows* on computers that are connected wirelessly to the Access Point. This error has been reported on computers using the Intel® PRO/Wireless 2200BG network connection with older driver software versions. This error does not occur with recent versions of the driver software.

NOTE: A STOP message is a Microsoft Windows* debug mode that appears on a screen with a blue background and is popularly known as a "Blue Screen of Death" or "BSOD."

Cause:

A combination of 3 things is known to cause this error. All 3 of the following must be true for the error described on this page to occur.

1. Cisco Aironet* access point running firmware version 12.3(8)JA
2. The .11 phone command is configured on the access point
3. Intel® PRO/Wireless 2200BG network connection with version 8.x driver software

Solution:
This issue can be resolved by upgrading your Intel® PRO/Wireless 2200BG network connection software. Contact your OEM for updated software. Generic software downloads are available by clicking here.

If upgrading the Intel® PRO/Wireless 2200BG network connection software is not practical, one of the following workaround solutions may be used:

1. Downgrade the Cisco Aironet* Access Point firmware to version 12.3(7)JA2
2. Disable the .11 phone command: no .11 phone.

This applies to:

Intel® PRO/Wireless 2200BG Network Connection