123380 -

The specification has evolved through multiple "Releases" to keep pace with mobile technology:

: These are specific Diameter protocol messages (Server-Assignment-Request and Location-Information-Request) used by the HSS and S-CSCF to update and overwrite user data during restoration events. 123380

The specification covers several critical failure and recovery scenarios across the IMS domain: The specification has evolved through multiple "Releases" to

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

: Focused on basic IMS recovery for GSM and UMTS.