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ETSI EN 301 247
- Digital cellular telecommunications system (Phase 2) (GSM); Comfort noise aspects for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.62 version 4.0.1)
- standard by European Telecommunications Standards Institute, 12/01/1997
- Publisher: ETSI
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EN created for GSM Phase2 MS type approval purposes (a revision of GSM Phase 2+ ETS)