ETSI - TS 124 072
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Call Deflection (CD) supplementary service; Stage 3
|Publication Date:||1 July 2020|
This Global System for Mobile communications Technical Specification specifies the procedures used at the radio interface (reference point Um as defined in 3GPP TS 24.002) for normal operation of Call Deflection (CD) supplementary service. Provision and withdrawal of supplementary services is an administrative matter between the mobile subscriber and the service provider and cause no signalling on the radio interface.