This second part of EN 301 060 is applicable to the basic call control extensions for Virtual Private Network (VPN) for
the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications
operators at the "b" service entry point (as defined in EN 301 060-1 [4]) by means of the Digital Subscriber Signalling
System No. one (DSS1) protocol.
The present document provides the Protocol Implementation Conformance Statement (PICS) proforma for the ISDN
DSS1 basic call control extensions at the "b" service entry point for VPN applications as specified in EN 301 060-1 [4]
in compliance with the relevant requirements and in accordance with the relevant guidance given in ISO/IEC 9646-7 [6].
The supplier of a protocol implementation which is claimed to conform to EN 301 060-1 [4] is required to complete a
copy of the PICS proforma provided in annex A of the present document and is required to provide the information
necessary to identify both the supplier and the implementation.