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Standards [CURRENT]

DIN ETS 300334

Integrated Services Digital Network (ISDN) - Signalling System no. 7 - Routeing in support of ISDN User Part (ISUP) version 2 services; English version ETS 300334:1995
Edition 1996-12

Standards [CURRENT]

DIN ETS 300145

Integrated Services Digital Network (ISDN) - Audiovisual services - Videotelephone systems and terminal equipment operating on one or two 64 kbit/s channels; English version ETS 300145:1996
Edition 1996-08

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