Technical rule
[CURRENT]
Article is not orderable
ITU-T E.131:1988-11
Subscriber control procedures for supplementary telephone services
- German title
- Teilnehmersteuerprozeduren für zusätzliche Fernsprechdienste
- Publication date
-
1988-11
- Original language
-
English
- Pages
- 8
- Publication date
-
1988-11
- Original language
-
English
- Pages
- 8
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