DIN ETS 300475-1 : 1996 Title: Private Telecommunication Network (PTN) - Reference configuration - Part 1: Reference configuration for PTN eXchanges (PTNX) [ISO/IEC 11579-1 (1994), modified]; English version ETS 300475-1:1995 Year: 1996 Publisher: DIN Media GmbH Availability: Within 1-2 working days