ETSI I-ETS 300 315/A1 [ Withdrawn ] Amendment 1 to - Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1); Protocol Implementation Conformance Statement (PICS) proforma specification for signalling network layer protocol for circuit-mode basic call control (primary rate access, user)

Amendment by European Telecommunications Standards Institute, 06/01/1996