Autoselection for a switch between wired and wireless network

Hello,
We currently have a VTC codec installed on a mobile cart that can connect via wireless or wired network.  The cart has the Linksys WET610N Dual-Band Wireless-N gaming and video adapter bridge.  If you want to go wireless you will have to unplug the CAT5 that goes into the walljack and plug in the cable from the bridge into the codec. 
We need a 3-5 port switch. Port 1 will connect to the wireless bridge.  Port 2 would be available to connect to a wall jack.  Port 3 will connect to the codec.
We need the ability for the switch to autoselect port 1 and 2.  If Port 2 is not connected (no link light), then Port 1 will be active.  If Port 2 is active, Port 1 will be inactive. 
I need to know how to configure the bridge and a network switch if this is scenerio is possible.  Any help is appreciated.
Thanks,
Aaron

Well, I thought i had tried this before, but I followed another board's suggestion of turning of IGMP proxy and it is now working. I can see my iTunes server which is wired on my wireless devices.

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