ITU-T I.431:1993-03

Primary rate user-network interface - Layer 1 specification

German title: Primärmultiple-Nutzer-Netz-Schnittstelle - Spezifikation der Schicht 1
Publication date: 1993-03
Original language: English
Pages: 39

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Replacement amendments

This document has been modified by: ITU-T I.431 AMD 1:1997-06

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