DIN EN 301810:2001-06
Отменен
Private Integrated Services Network (PISN) - Inter-exchange signalling protocol - Private User Mobility (PUM); Call handling Additional Network Features (ANFs) (ISO/IEC 17878 (2000), modified) (Endorsement of the English version EN 301810 V 1.1.1 (2000-10) as German standard)
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