ETSI ETS 300 438-2 Broadband Integrated Services Digital Network (B-ISDN); Signalling ATM Adaptation Layer (SAAL); Service Specific Co-ordination Function (SSCF) for support of signalling at the Network Node Interface (NNI); Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification

standard by European Telecommunications Standards Institute, 04/01/1998