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DIN ETS 300580-4
European digital cellular telecommunications system (Phase 2) - Part 4: Comfort noise aspects for full rate speech traffic channels; English version ETS 300580-4:1994
Edition
1995-01
NF Z83-580-4 ; NF ETS 300580-4:1998-08-01
Digital cellular telecommunications system (Phase 2). Full rate speech. Part 4: confort noise aspect for full rate speech traffic channels (GSM 06.12)
Edition
1998-08-01
NF Z83-581-4 ; NF ETS 300581-4:1998-09-01
Digital cellular telecommunications system (phase 2). Half rate speech. Part 4: comfort noise aspect for half rate speech traffic channels (GSM 06.22 version 4.1.1)
Edition
1998-09-01
