Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Immediate Service Termination (IST); Stage 2 (V15.0.0; 3GPP TS 23.035 version 15.0.0 Release 15)
This Technical Specification specifies the stage 2 description of the Immediate Service Termination (IST) service which provides the means for the HPLMN to terminate all the activities of an HPLMN subscriber in a VPLMN. Two implementations of IST are described: an implementation based on CAMEL@ and an implementation based on a new MAP message.