Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification
Edition 2000-08-01

Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification
Edition 2000-08-01

Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification for the user
Edition 1999-11-01

Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - 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 2000-10-01

Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 5: Test Suite Structure and Test Purposes (TSS&TP) specification for the network
Edition 1999-12-01

Integrated Services Digital Network (ISDN) - Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices - 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 2000-10-01

Integrated Services Digital Network (ISDN) - Teleaction teleservice - Service description
Edition 1999-04-01

INTEGRATED SERVICES DIGITAL NETWORK (ISDN). 3,1 KHZ TELEPHONY TELESERVICE. ATTACHMENT REQUIREMENTS FOR HANDSET TERMINALS.
Edition 1994-05-23

INTEGRATED SERVICES DIGITAL NETWORK (ISDN); TELEPHONY 3,1 KHZ TELESERVICE. SERVICE DESCRIPTION.
Edition 1999-11-29

INTEGRATED SERVICES DIGITAL NETWORKS (ISDN). TELEPHONY 3,1 KHZ TELESERVICE. ATTACHMENT REQUIREMENTS FOR HANDSET TERMINALS.
Edition 1999-10-28