: Procedures for recovering the Home Subscriber Server, which acts as the central database for user identities and profiles.
The specification has evolved through multiple "Releases" to keep pace with mobile technology: 123380
: 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. : Procedures for recovering the Home Subscriber Server,
: Nodes use indicators (often via IETF RFC 6223) to detect the availability of peers and trigger restoration if a failure is detected. 4. Evolution and Versions 123380
For further technical reading, the latest versions (such as ) are available via the ETSI Deliverable Repository . ETSI TS 123 380 V9.6.0 (2014-03)