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Technische Regel
ETR 144
Issue date: 1994 10
Universal Personal Telecommunication (UPT) - UPT phase 1 - Numbering, dialling and evolution for incall
Withdrawn
: 2022 02 01
Publisher:
European Telecommunications Standards Institute
Format:
Paper | 22 Pages
Language:
English
ICS
Technische Regel
ETR 055-3
Issue date :
1992 12
Universal Personal Telecommunication (UPT) - The service concept - Part 3: Service aspects of charging, billing and accounting
Technische Regel
ETR 055-3
Issue date :
1992 12
Universal Personal Telecommunication (UPT) - The service concept - Part 3: Service aspects of charging, billing and accounting