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ETSI TS 100 512
- Digital cellular telecommunications system (Phase 2+) (GSM); Procedure for call progress indications (GSM 02.40 version 7.0.1 Release 1998)
- standard by European Telecommunications Standards Institute, 07/01/1999
- Publisher: ETSI
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SUBJECT Harmonization between GSM 02.40 version 5.0.0 and J-STD-007 Volume 7.