2019/09 55 p.
The present document specifies both the architectural and functional system requirements for Lawful Interception (LI)
in 3GPP networks. The present document provides an LI architecture supporting both network layer based and service
layer based Interception.
National regulations determine the specific set of LI functional capabilities that are applicable to a specific 3GPP
full Table of Contents for TS 33.127 Word version: 16.1.0