Lawful Interception (LI) implementation guidance; LI for PTC
The present document provides architectural diagrams, conceptual scenarios, flow-diagrams, examples, and other background information which can be useful to implement the LI functions defined in TS 33.126 [2], TS 33.127 [3] and TS 33.128 [4].
The present document covers the LI for PTC that include the illustrations covering the conceptual overview and the flow diagrams for MCPTT and PoC commonly referred to as Push to Talk over Cellular.