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ETSI GTS 08.08-EXT
- European digital cellular telecommunications system (Phase 1); BSS-MSC; Layer 3 specification (GSM 08.08-EXT)
- standard by European Telecommunications Standards Institute, 01/01/1995
- Publisher: ETSI
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Extension of GSM 08.08 to cover dual ciphering algorithms (A5/1 & A5/2)