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DIN ETS 300203
Integrated Services Digital Network (ISDN) - Call Forwarding Busy (CFB) supplementary service - Functional capabilities and information flows; English version ETS 300203:1994
Edition
1995-06
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
DIN ETS 300205
Integrated Services Digital Network (ISDN) - Call Forwarding No Reply (CFNR) supplementary service - Functional capabilities and information flows; English version ETS 300205:1994
Edition
1995-06
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
