ETSI EN 300 009-1
ETSI EN 300 009-1
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]
standard published 02/01/2001 by European Telecommunications Standards Institute