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We have a customer WLAN comprising a 350 Bridge with an omni antenna connecting to an AP1200. The customer wants to run 7920 IP mobiles roaming between the 350 and the 12000. The 350 is set to be a "Root Bridge" and the AP1200 associates with it fine...
You need to enable VLAN's on the link. Presumably it's a wireless link? If so, go to the Setup page for your Bridge/AP and click the VLAN link. Configure your data (which you normally set as the default VLAN) and voice VLANs here using the same VLAN ...
Solved! The solution was to upgrade the firmware on the 350 Bridges from 12.00T to 12.04. I searched Cisco's web site plus all the README's for all the firmwares from 11.xx up to 12.04 and there's not a mention of any problem. Strange that.