MMS-C Multimedia Messaging Center
In 2002 I was involved in a number of Multimedia Messaging Service (MMS) Center system integration projects in german mobil telecommunication market.
Besides setting up the infrastructure I also developed a couple of Cebit fair showcases like WEB/WAP content portals for MMS and Over the Air configuration of mobile phones (WAP and MMS settings).

"CaDaX is a value-added service which allows M-commerce providers to offer a solution for maintaining the directory information stored in mobile devices."
Publication about CaDaX:
Hampe, J. F.; Cohnen, C.: CaDaX: A Prototype for SIM-Card Data Exchange. Proceedings of: Conference on Telecommunications and Information Markets: COTIM2001, Karlsruhe, 2001 PDF The CaDaX project is under further development by IWI. See more at the University of Koblenz CaDaX webpage.

Another Project at University of Koblenz is Notification of Email via SMS and Voice (NOVICE). See NOVICE webpage.