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ETSI TR 101 641
- Digital cellular telecommunications system (Phase 2+) (GSM); Half rate speech; Performance characterization of the GSM half rate speech codec (GSM 06.08 version 8.0.0 Release 1999)
- standard by European Telecommunications Standards Institute, 06/01/2000
- Publisher: ETSI
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Updated to Version 8.0.0 CRs from SMG#31