The efficacy of levodopa therapy in patients being treated for Parkinson’s disease is enhanced by administering high doses of a partial glycine agonist. The method calculates a threshold probability for access to the Internet service and generates a number of challenge-response tests. A system for holding fiber optic connectors includes a fiber optic connector holder mounted within an opening in a bulkhead for mounting a fiber optic adapter. In the event of a system exception, the module may collect system exception information, such as a memory dump.