An 'undefined' page is any page that has been linked to from within Confluence, but that does not yet exist.

Undefined Page Linked From
Advanced Settings Page: Socket timeout while listening for reply from server:null (iSymphony Knowledge Base)
Client Installation and Uninstallation Page: Client fails to launch when using Mac OS X Lion 10.7 or higher with Java 7 (iSymphony Knowledge Base)
Page: Connecting to the Administration Interface (iSymphony v2.4 Documentation)
Page: Java Web Start Error: Unsigned application requesting unrestricted access to system (iSymphony Knowledge Base)
Page: Updating (iSymphony v2.4 Documentation)
Page: iSymphony JNLP client download no longer available for Mac OS X (iSymphony Knowledge Base)
and approximately 7 more…
For Additional Help Page: Socket timeout while listening for reply from server:null (iSymphony Knowledge Base)
License Installation and Details Page: Tenant Configuration (iSymphony v2.7 Documentation)
Page: Connection Failed: Tenant Client Limit Reached (iSymphony Knowledge Base)
Page: Tenant Configuration (iSymphony v2.4 Documentation)
Page: Tenant Configuration (iSymphony v2.6 Documentation)
Page: Tenant Configuration (iSymphony v2.8 Documentation)
Location Configuration Page: Connection Failed: Tenant Deactivated (iSymphony Knowledge Base)
Multi-Tenant Configuration Page: Tenant Configuration (iSymphony v2.6 Documentation)
Page: Tenant Configuration (iSymphony v2.4 Documentation)
Starting, Stopping and Restarting the Server Page: Calls Stuck in Panel (iSymphony Knowledge Base)
Page: Updating (iSymphony v2.4 Documentation)
Page: Tenant default not found (iSymphony Knowledge Base)
Updating iSymphony Page: Uncaught UI Exception (iSymphony Knowledge Base)
Page: iSymphony JNLP client will not launch after upgrading Java to 1.7.0_45 (iSymphony Knowledge Base)
Page: Not connected to Asterisk Server (iSymphony Knowledge Base)
Page: iSymphony fails to respond after reload (iSymphony Knowledge Base)
Page: java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index: 92, Size: 35 (iSymphony Knowledge Base)
iSymphony Configuration (Advanced) Page: FreePBX Module Administration (iSymphony v2.7 Documentation)
Page: FreePBX Module Administration (iSymphony v2.6 Documentation)
Page: FreePBX Module Administration (iSymphony v2.8 Documentation)
Page: FreePBX Module Administration (iSymphony v2.4 Documentation)