Lawful Interception (LI) is the lawful monitoring (tapping) of telecommunications networks and services. Lawful interception is understood to mean technical equipment prescribed by law with which legally authorised persons can connect toconnections and intercept the content
. Lawful interception, also known as legal interception, applies equally to circuit- and packet-switched, to wireline and wireless networks,
networks andcable networks, and to all communications and telecommunications services. It includes voice communications, telephony, cellulartelephony and Internettelephony, long distance copying, file transfer, e-mail and Short Message Service
(SMS) storage, Internet activities, and more.
. The LI architecture and the technical guidelines for the switch-on points are specified in various LI standards by the European Telecommunications Standards Institute (ETSI), the Third Generation Partnership Project (3GPP), Terrestrial Trunked Radio (TETRA), Telecommunication and Internet Converged Services and Protocols for Advanced Networking (TISPAN), American National Standards Institute (ANSI) and PacketCable.