ETSI - TS 124 087
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); User-to-User Signalling (UUS) Supplementary Service; Stage 3
|Publication Date:||1 July 2020|
This Technical Specification gives the stage 3 description of the User-to-User signalling supplementary services.
The User-to-user supplementary service is divided into 3 different services:
- Service 1 (UUS1)
- Service 2 (UUS2)
- Service 3 (UUS3)