• DIN EN 300356-18 : 2002

    Current The latest, up-to-date edition.

    INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - SIGNALLING SYSTEM NO. 7 (SS7) - ISDN USER PART (ISUP) VERSION 4 FOR THE INTERNATIONAL INTERFACE - PART 18: COMPLETION OF CALLS TO BUSY SUBSCRIBER (CCBS) SUPPLEMENTARY SERVICE

    Publisher:  German Institute for Standardisation (Deutsches Institut für Normung)

    Published: 

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