ETSI TS 122 081
ETSI TS 122 081
Digital cellular telecommunications system (Phase 2 ) (GSM); Universal Mobile Telecommunications System (UMTS); Line identification Suplementary Services; Stage 1 (3GPP TS 22.081 version 4.0.0 Release 4) Edition: 4.0.0European Telecommunications Standards Institute / 01-Mar-2001 / 20 pages