Development of a Graphical Tool to Visualise the X.25 Protocol

Royal Signals and Radar Establishment (RSRE)

This project funded by the Royal Signals and Radar Establishment (RSRE) Defford, constructed a graphical protocol analyser using a graphics workstation. A PC-based tool allowed packets of data to be captured from an active communications line and stored, together with timing data, onto a disk. The analyser executed on a SUN workstation and was programmed in the Simula language. It used the Network Extensible Windowing System (NeWS) to provide a menu-driven interactive user interface. Using this tool the user displays frame transition diagrams for the HDLC and X.25 protocols. The tool provides a number of display formats, allowing the user to browse through large data sets and zoom into interesting features. All the display code uses the PostScript language.


This work was performed by: [List of Projects in ERG]