Abstract: Methods and systems for automated diagnosis of problems in a VPN connection by an end user of the VPN connection. The invention provides a method for identifying problems in a virtual private network comprising: automatically performing tests of the virtual private network in response to a request from the end user; automatically identifying a problem indicated by analysis of results of the tests, and communicating the identified problem to the end user. The invention provides for communication with the end user in the form of text messages and/or color-coded icons as well as suggested remedies for the identified problem. The invention thereby reduces the load on help-desk/support personnel in resolving common problems in VPN connections by enabling end user self-help without detailed technical training of the end users.

Abstract: An integrated, non-coupled structure comprises a body of ferrite material with a plurality of through passages. A plurality of conductors pass through respective ones of the passages to form windings, certain of which have no magnetic field coupling and hence provide separate non-coupled magnetic functions. The magnetic structure is used as a component of a switching dc-to-dc converter, integrating the functions of isolation transformer, output filter and feedback signal coupling.