ETSI EN 300 009-2 English Printed Edition English PDF Final draft Version 1.4.1Integrated Services Digital Network (ISDN); Signalling System No.7; Signalling Connection Control Part (SCCP) (connectionless and connection-oriented class 2) to support international interconnection; Part 2: Protocol Implementation Conformance Statement (PICS) proforma spec

standard published 12/01/2001 by European Telecommunications Standards Institute