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DIN ETS 300114
Public Switched Telephone Network (PSTN) - Basic Category I and Category II specifications for modems standardized for use on the PSTN; English version ETS 300114:1996
Edition
1997-08
DIN ETS 300391-1
Universal Personal Telecommunication (UPT) - Specification of the security architecture for UPT phase 1 - Part 1: Specification; English Version ETS 300391-1:1995
Edition
1996-02
