SR ETS 300 403-1:1997/C1:2025

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]

General information

Status : Valid
Approval date : 3/31/2025
Number of pages : 7
ICS : 33.080 Integrated Services Digital Network (ISDN)
Technical Committee : 6 - Radiocommunications, telecommunications

Relations with other standards:

Replaced by SR EN 300 403-1 V1.3.2:2015
Amends SR ETS 300 403-1:1997