When opening a large list in Access, the open is timing out at 30 seconds. The list is fairly large, smaller lists open just fine.
Any ideas on how to "open this up"?
You "may" need to increase the http timeout limit in the IIS web config file for the web application where you have the site running with the list.
Said that, you "have" to also check the following options through Central Administration > Application Management > Manage Service Applications > Access Service Application
Maximum Request Duration increase this to 300
Set the above to a considerable large number depending on the size of your list and the number of items.