ETSI EN 300 356-1:2000 Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) Version 4 for the International Interface; Part 1: Basic Services (V4.1.1; ITU-T Recommendation Q.761 to Q.764 (2000)@ Modified)
2001ETSI EN 300 356-1:2001 Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) Version 4 for the International Interface; Part 1: Basic Services (V4.2.1; ITU-T Recommendation Q.761 to Q.764 (1999) Modified)
2000ETSI EN 300 356-1:2000 Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) Version 4 for the International Interface; Part 1: Basic Services (V4.1.1; ITU-T Recommendation Q.761 to Q.764 (2000)@ Modified)
1998ETSI EN 300 356-1:1998 Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) Version 3 for the International Interface; Part 1: Basic Services (V3.2.2; ITU-T RECMN Q.761 to Q.764 1997@ Modified)
1997ETSI EN 300 356-1:1997 Integrated Services Digital Network (ISDN); Signalling System No.7; ISDN User Part (ISUP) Version 3 for the International Interface; Part 1: Basic Services (V3.1.1; ITU-T RECMN Q.761 to Q.764 1997@ Modified)