This part of IEC 62481 specifies guidelines for Diagnostics. The DLNA Diagnostics guidelines focus mostly on the collection of data through test actions and queries. The procedures for troubleshooting and remedies are outside the scope of the DLNA guidelines. The user can be an operator accessing the Diagnostics Application through a TR-069 (an application layer protocol for remote management of end-user devices) management interface, or a technician or end-user accessing it through a browser or screen interface as shown in Figure 1.