The third part of EN 301 060 is applicable to the basic call control extensions at the "b" service entry point for Virtual
Private Network (VPN) applications for the pan-European Integrated Services Digital Network (ISDN) as provided by
European public telecommunications operators at the T reference point (as defined in ITU-T Recommendation
I.411 [15]) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol. Stage three identifies the
protocol procedures and switching functions needed to support a telecommunications service (see CCITT
Recommendation I.130 [11]).
The present document specifies the Test Suite Structure and Test Purposes (TSS&TP) for the user side for the
ISDN DSS1 basic call control extensions at the "b" service entry point for VPN applications as specified in
EN 301 060-1 [1] in compliance with the relevant requirements and in accordance with the relevant guidance given in
ISO/IEC 9646-7 [10].