ÖNORM EN 300009-1 V 1.4.3:2001-05
Действует
Integrated Services Digital Network (ISDN) - Signalling System No.7 - Signalling Connection Control Part (SCCP) (connectionless and connection-oriented) to support international interconnection - Part 1: Protocol specification [ITU-T Recommendations Q.711 to Q.716 (1996), modified]
