[bbc] As protests continue in Iran, details are emerging of the technology used to monitor its citizens.
Iran is well known for filtering the net, but the government has moved to do the same for mobile phones.
Nokia Siemens Network has confirmed it supplied Iran with the technology needed to monitor, control, and read local telephone calls.
It told the BBC that it sold a product called the Monitoring Centre to Iran Telecom in the second half of 2008.
Hi-tech helps Iranian monitoring