NEN EN 300064-1 : 1998
Current
The latest, up-to-date edition.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - DIRECT DIALLING IN (DDI) SUPPLEMENTARY SERVICE - DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. ONE (DSS1) PROTOCOL - PART 1: PROTOCOL SPECIFICATION
12-01-2013
Describes the stage three of the Direct Dialling In (DDI) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators at the T reference point or coincident S and T reference point (as defined in ITU-T Recommendation I.411) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol.
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