Is there an API that would detect network loss on an I/O board that could trigger an alarm?

Hi. Generally it’s not possible for I/O board. You can look at the Status SOAP API for getting device statuses ( http://doc.developer.milestonesys.com/html/index.html?base=statushelp/index.html&tree=tree_search.html?search=status+soap ), but I don’t think it can handle I/O boards. In general case you would need to provide a custom solution and make a plugin for this.