Integrated Services Digital Network (ISDN); application of the ISDN User Part (ISUP) of CCITT signalling system no. 7 for international ISDN interconnections (ISUP version 1); English version ETS 300121:1992
Integrated Services Digital Network (ISDN) - Application of the ISDN User Part (ISUP) of ITU-T Signalling System No. 7 (SS7) for international ISDN interconnections (ISUP version 1); Amendment 1: International Emergency Preference Scheme (IEPS) service [ITU-T Recommendation Q.767 Amendment 1 (2002), modified] (Endorsement of the English version EN 300121 V1.2.1 (2003-07) as German standard)— 2 стр.
Integrated Services Digital Network (ISDN) - Signalling System No.7 - Support of Virtual Private Network (VPN) applications with Private network Q reference point Signalling System number 1 (PSS1) information flows - Part 1: Protocol specification [ITU-T Recommendations Q.765.1 and Q.699.1, modified]
