123380 Instant

: During initial registration, the S-CSCF backs up critical data—such as the list of SIP proxies, contact information, and authentication schemes—to the HSS.

: Mechanisms for the Proxy-CSCF to recover its relationship with the user equipment (UE) after a restart. 123380

The specification covers several critical failure and recovery scenarios across the IMS domain: : During initial registration, the S-CSCF backs up

: Procedures for recovering the Home Subscriber Server, which acts as the central database for user identities and profiles. The primary goal of TS 23

The primary goal of TS 23.380 is to ensure service continuity and high availability within the IMS core network. While network nodes (like the S-CSCF, HSS, and P-CSCF) are designed for reliability, maintenance or unforeseen failures can cause data loss or corruption. This document standardizes automatic restoration procedures to minimize user impact when these events occur. 2. Core Restoration Scenarios