LST ETS 300 581-3 Leid.1-2007 European digital cellular telecommunications system;Half rate speech;Part 3: Substitution and muting of lost frames for half rate speech traffic channels (GSM 06.21)
2007LST ETS 300 581-3 Leid.1-2007 European digital cellular telecommunications system;Half rate speech;Part 3: Substitution and muting of lost frames for half rate speech traffic channels (GSM 06.21)