PRETS 300 186 : APR 93
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN); THREE PARTY (3PTY) SUPPLEMENTARY SERVICE, SERVICE DESCRIPTION
07-01-1993
01-12-2013
Defines the stage one of the Three Party (3PTY) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunication operators. Defines the interworking requirements of private ISDNs with the public ISDN. Applies to the stage two and the stage three standards for the ISDN 3PTY supplementary service. Does not cover charging principles.
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