FIELD: information technology.
SUBSTANCE: emergency recovery method comprises the following steps: receive, at start of redundant Call Session Control Function (CSCF), by means of redundant CSCF, the user data of registered IMPI of IP-multimedia subsystem (IMS) backup, which are connected with IMPU IMS, and IMPU user services configuration in IMS subscription data from network storage facility, and execution of corresponding service by means of redundant CSCF according to received user data of registered IMPI backup and IMPU user services configuration in IMS subscription data.
EFFECT: providing possibility to recover service "one public user identifier - multiple private user identifiers, one IMPI - multiple IMPUs or multiple IMPIs - multiple IMPUs" which gives user better feel of service integrity.
24 cl, 26 dwg
