Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Three-Party (3PTY) supplementary service - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)
Edition 2002-07-01

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Supplementary service interactions - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
Edition 2002-07-01

Integrated Services Digital Network (ISDN) - Supplementary service interactions - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (incl. Diskette!!!)
Edition 2001-02-01

Integrated Services Digital Network (ISDN) - Supplementary service interactions - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)
Edition 2001-02-01

Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
Edition 2001-09-01

Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (incl. Diskette!!!)
Edition 2002-02-01

Integrated Services Digital Network (ISDN) - Generic functional protocol for the support of supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)
Edition 2002-02-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No. One (DSS1) - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
Edition 2001-09-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 4: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the user (incl. Diskette!!!)
Edition 2002-02-01

Integrated Services Digital Network (ISDN) - Diversion supplementary services - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 6: Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma specification for the network (incl. Diskette!!!)
Edition 2003-04-01