Standard
[CURRENT]
NF Z82-139:1994-09-01
NF ETS 300139:1994-09-01
Integrated Services Digital Network (ISDN). Call hold (hold) supplementary service. Service description
- German title
- INTEGRATED SERVICES DIGITAL NETWORK (ISDN). DIENSTMERKMAL HALTEN. DIENSTBESCHREIBUNG
- Publication date
-
1994-09-01
- Original language
-
French
- Pages
- 15
- Publication date
-
1994-09-01
- Original language
-
French
- Pages
- 15
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