Nokia Siemens, a joint venture between the Finnish and German companies, supplied the system to Iran through its Intelligent Solutions business, which was sold in March 2009 to Perusa Partners Fund 1LP, a German investment firm. The product allows authorities to monitor any communications across a network, including voice calls, text messaging, instant messages, and web traffic.
Here's an interesting spin on dual use technology. Typically this term is used to describe how technology developed in the collective West can be used by terrorists and totalitarian regimes as weapons against the same. However, the lesson of Iran provides a different interpretation (obvious to some, less so to others). It appears that the technologies that Western governments demand for "enhanced law enforcement" such as systems that enable governments to monitor/archive all cell phone text messages are the same technologies that totalitarian governments use for repression (forensic analysis using these technologies will be used to torture and imprison dissidents in Iran).