Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) protocol;Signalling network layer for circuit-mode basic call control;Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified] (Endorsed by Asociación Espanola de Normalización in August of 2022.)

Die Norm herausgegeben am 1.8.2022

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified] (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified] (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) protocol;Signalling network layer for circuit-mode basic call control;Part 2: Specification and Description Language (SDL) diagrams (Endorsed by Asociación Espanola de Normalización in August of 2022.)

Die Norm herausgegeben am 1.8.2022

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 2: Specification and Description Language (SDL) diagrams (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) protocol;Signalling network layer for circuit-mode basic call control;Part 3: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsed by Asociación Espanola de Normalización in August of 2022.)

Die Norm herausgegeben am 1.8.2022

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 3: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 3: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 3: Protocol Implementation Conformance Statement (PICS)proforma specification (Endorsed by AENOR in July of 2005.)

Die Norm herausgegeben am 1.7.2005

Integrated Services Digital Network (ISDN);Digital Subscriber Signalling System No. one (DSS1) protocol;Signalling network layer for circuit-mode basic call control;Part 4: Test Suite Structure and Test Purposes (TSS&TP) specification for the user (Endorsed by Asociación Espanola de Normalización in August of 2022.)

Die Norm herausgegeben am 1.8.2022