Here is a URL that expains what you are looking for. http://www.cisco.com/en/US/products/hw/phones/ps379/products_implementation_design_guide_chapter09186a00802a0a1e.html

You follow the same steps, but you do not put the word "native" after "encapsulation dot1q".

You might want to replace the cable to rule out it being defective. Then try uprgrading to 12.04 for the bridge if the cable change did not work . Here are the release notes.http://www.cisco.com/en/US/products/hw/wireless/ps458/prod_release_note09186...

Not knowing how the antenna was attached to the roof, I suggest you take a couple of adjustable wrenches in case there are bolts holding the antenna onto a mast, a slotted head (flat head) screwdriver, a Phillips head screwdriver in case the antenna ...

If you have the G radio card installed, remove it and upgrade the access point to 12.2(13)JA or later and then install the radio card.