name: SIRF
full_form: System Information Retrieval Function
context: responsibilities in managing and maintaining interception are defined in clause 5.3.2. As described in clause 5.6 of the present document, the OSS/BSS is responsible for managing the number of NFs within the network including the NF within which the SIRF is implemented. Therefore, the SIRF is not responsible for notifying the LIPF that a new NF, POI, TF or MDF has been instantiated (in virtualised networks) or connected to the network using manual processes (legacy networks). The LIPF is notified of these events directly by the relevant CSP management system as described in clause 5.6, prior to any interaction with the SIRF. When the SIRF subsequently notifies the LIPF that, for example an NF associated with a POI has now been registered with the SIRF, the LIPF knows that an NF and POI which it has already configured for LI usage is ready for live user traffic service. NOTE: The SIRF will only become aware of the existence of NFs after they are commissioned for use within the network
description: The System Information Retrieval Function (SIRF) is responsible for managing and maintaining system information, including interception. It interacts with other network functions like the Lawful Interception Processing Function (LIPF) by notifying it about registered NFs associated with Points of Interest (POIs), enabling LIPF to configure them for lawful interception.
explanation: The text describes SIRF's duties within a telecommunications network, emphasizing its interaction with other network functions and its role in managing system information crucial for lawful interception processes. This clearly classifies it as a Network Function.
section_title: 5.3.6	System Information Retrieval Function (SIRF)
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