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AFNOR
AFNOR
NF ETS 300569
En Vigor
1998-04-01
Digital cellular telecommunications system (Phase 2). Closed User Group
(CUG) supplementary services. Stage 3. (GSM 04.85).
AFNOR
NF ETS 300140
En Vigor
1994-12-01
Integrated Services Digital Network (ISDN). Call hold (hold)
supplementary service. Functional capabilities and information flows.
AFNOR










