UNE-ETS 300923 Ed1:2023 Digital cellular telecommunications system;Description of Charge Advice Information (CAI) (GSM 02.24 version 5.0.1) (Endorsed by Asociación Española de Normalización in February of 2023.)
2023UNE-ETS 300923 Ed1:2023 Digital cellular telecommunications system;Description of Charge Advice Information (CAI) (GSM 02.24 version 5.0.1) (Endorsed by Asociación Española de Normalización in February of 2023.)