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Standards [CURRENT]

DIN ETS 300184

Integrated Services Digital Network (ISDN); conference call, add-on (CONF) supplementary service; functional capabilities and information flows; English version ETS 300184:1993 + Corrigendum September 1993
Edition 1994-04

Standards [CURRENT]

DIN ETS 300204

Integrated Services Digital Network (ISDN) - Call Forwarding Unconditional (CFU) supplementary service - Functional capabilities and information flows; English version ETS 300204:1994
Edition 1995-06

Standards [CURRENT]

DIN ETS 300206

Integrated Services Digital Network (ISDN) - Call Deflection (CD) supplementary service - Functional capabilities and information flows; English version ETS 300206:1994
Edition 1995-06

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