Lawful Interception (LI) is the legally approved surveillance of telecommunication services, and it has become an important tool for law enforcement agencies (LEAs) . for investigating and prosecuting criminal activities and terrorism. Most countries have passed laws that require telecommunication service providers to support LEAs with duly authorized requests to identify, monitor, and deliver all of the electronic communication of specified individuals and groups. In addition there are national regulatory authorities and international standardization bodies that together define the technical framework for lawful interception.

SSI and its partners have been in the business of lawful interception since 1994 and has installed LI Management Systems in more than forty countries around the world. As an active supporter of the ETSI LI group, SSI team members and its partners have participated in developing technical standards and compliance tests. SSI provides a Lawful Interception Management System as a comprehensive solution that provides state-of-the-art surveillance capabilities for fixed and mobile communication networks and for various communication services, including traditional circuit-switched voice, and Internet-based services like e-mail and VoIP.