UNE-ETS 300935 Ed1:2023 Digital cellular telecommunications system;Advice of Charge (AoC) supplementary services;Stage 2 (GSM 03.86 version 5.0.1) (Endorsed by Asociación Española de Normalización in February of 2023.)
2023UNE-ETS 300935 Ed1:2023 Digital cellular telecommunications system;Advice of Charge (AoC) supplementary services;Stage 2 (GSM 03.86 version 5.0.1) (Endorsed by Asociación Española de Normalización in February of 2023.)