Issue: Xbox 360s with firmware versions 2.X, are sometimes unable to join a wireless network hosted by the Arris TG862/TG852 Comcast Wireless Gateways Devices.
Details: When an Xbox 360 with firmware version is 2.X, attempts to connect to the wireless network hosted by Arris TG862/TG852 with firmware 7.4.63A or earlier, the association with wireless gateway could fail.
Problem: If the firmware version is 2.X, then the Xbox 360 console uses a Marvell-based WiFi chipset. If the firmware version is 12.X, then the Xbox 360 console uses a Qualcomm-Atheros WiFi chipset. This issue is seen only with the Marvell WiFi chipset -- NOT the Qualcomm-Atheros chipset.
Long-Term Fix: This will be resolved with Arris firmware 7.6.59, expected to be released in March 2013 (contingent upon successful quality testing).
Short-Term Workaround: An Xbox 360 can be connected to the wireless gateway via an Ethernet cable.
How to Determine Your Xbox 360 Firmware Version:
1. Start the process to setup a wireless profile to connect to a wireless nerwork
2. Go to the wireless profile and then select "Configure Network"
3. Then go to the right to "Additional Settings" tab