French SSUTR2 (Système de signalisation par canal sémaphore CCITT no.7) is the French national variant of the Telephone User Part (TUP).
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French SSUTR2 (Système de signalisation par canal sémaphore CCITT no.7) is the French national variant of the Telephone User Part (TUP).
| | This technology-related article is a stub. You can help Wikipedia by expanding it. |