NF ETS 300210-1

Integrated Services Digital Network (ISDN). Freephone (FPH) supplementary service. Digital substriber Signalling System n° one (DSS) protocol. Part 1 : protocol specification.

Le présent document décrit le protocole de signalisation d''abonné numérique pour le complément de service Libre appel (FPH) sur un réseau numérique à intégration de services (MIS), qui permet à un usager abonné de supporter les coûts des appels destinés à un numéro donné à la place de l''appelant.

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