Here are the diagrams for [TS 33.128](https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3183)
The file names used for the diagrams are the figure numbers, e.g. Figure_4.1-1.vsdx. Inside the visio file, the page name represents the TS version number, e.g. 18.2.0. When a new CR is submitted that changes the figure, a new page is inserted with the modified figure with the new version number (e.g. 18.3.0) of the TS. Once the CR is agreed, the figure with the earlier version (i.e. 18.2.0) can be deleted.
