name: IM-MGW
full_form: IMS Media Gateway
context: Figure 4.3.2-2 shows a scenario where Party A from a CS domain (another CSP) calls Party B. In this example, Party A is a non-local ID target in the CSP domain of interest. Figure 4.3.2-2: Party A (non-local ID target) from CS domain calls Party B As shown in figure 4.3.2-2, only the network functions that handle the A-side (non-local ID target side) of the session are involved in handling the LI functions. The IRI-POI present in the MGCF accesses the SIP messages and generates the required xIRI. The CC-TF present in the MGCF triggers the CC-POI present in the IM-MGW for the xCC. The CC-POI present in the IM-MGW generates the xCC. NOTE 1: Since only the egress signalling at the MGCF is SIP-based, this architecture assumes that the interception is done using the SIP messages seen at the step 3. The MDF2 generates the IRI messages from the xIRI and delivers them to the LEMF. The MDF3 generates the CC from the received xCC and delivers it to the LEMF. The details of the above LI functions
description: The IMS Media Gateway (IM-MGW) handles media streams in IP Multimedia Subsystem (IMS) networks. It's crucial for Lawful Interception (LI) by triggering the Content Corruption Point of Interface (CC-POI) to generate xCC, used to create CC messages.
explanation: IM-MGW is a Network Function because it processes media within the IMS network and performs LI functions.  It directly interacts with the CC-POI, showcasing its role as a network component.
section_title: 4.3.2.3	Party A (non-local ID target, CS domain) calls Party B
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