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DIN EN 300261:2004-12

Действует
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Call transfer supplementary service (ISO/IEC 13869 (2003), modified) (Endorsement of the English version EN 300261 V1.3.1 (2004-01) as German standard) — 2 стр.
DIN ETS 300261:1996-06
Отменен
DIN EN 300261:2004-12
Действует