Software
Diabelli: An IP Multimedia Subsystem (IMS) Simulator
Diabelli is a simulation tool of the IP multimedia subsystem (IMS) standards, defined by the 3rd Generation Partnership Project (3GPP), specify a large number of functional units. The quantityy and location of these units vary widely depending on network access technology, services, and market size. This tool allows network designers to specify over 80 different parameters to simulate the interaction of IMS elements. 

More information about Diabelli can be found in the following paper: 

  • Mauricio Cortes, Jairo Esteban, and Hyewon Jun

Diabelli: an IMS Simulation Tool, 

In Bell Labs Technical Journal, Vol. 10, No. 4, 2006