ETSI EN 301 452-1:1999 Private Integrated Services Network (PISN); Inter-Excahange signalling Protocol; Call Completion Supplementary Services; Part 1: Test Suite Structure and Test Purposes (TSS&TP) Specification (V1.1.3)
2000ETSI EN 301 452-1:2000 Private Integrated Services Network (PISN); Inter-Excahange signalling Protocol; Call Completion Supplementary Services for the VPN b Service Entry Point; Part 1: Test Suite Structure and Test Purposes (TSS&TP) Specification (V1.1.4)
1999ETSI EN 301 452-1:1999 Private Integrated Services Network (PISN); Inter-Excahange signalling Protocol; Call Completion Supplementary Services; Part 1: Test Suite Structure and Test Purposes (TSS&TP) Specification (V1.1.3)