scope:

The present document provides the Protocol Implementation Conformance Statement (PICS) proforma for the Integrated Services Digital Network (ISDN) Digital Subscriber Signalling System No. one (DSS1) protocol signalling network layer for circuit-mode basic call control as specified in ETS 300 403-1 [1] and ETS 300 403-2 [2] in compliance with the relevant requirements and in accordance with the relevant guidance given in ISO/IEC 9646-7 [4]. Both the packet communication procedures (see clause 6 of ETS 300 403-1 [1]) and the User Signalling Bearer Service (USBS) procedures (see clause 7 of ETS 300 403-1 [1]) are excluded from this PICS proforma.