Public Switched Telephone Network (PSTN) - Calling Line Identification Restriction (CLIR) supplementary service - Service description; English version ETS 300649:1997
Edition 1997-12

Intelligent Network (IN) - Intelligent Network Capability Set 1 (CS1), Core Intelligent Network Application Protocol (INAP) - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification for Service Switching Function (SSF), Specialized Resource Function (SRF) and Service Control Function (SCF); English version ETS 300374-2:1996
Edition 1996-10

Integrated Services Digital Network (ISDN); conference call, add-on (CONF) supplementary service; service description; English version ETS 300183:1992
Edition 1993-09

Private Integrated Services Network (PISN) - Cordless Terminal Mobility (CTM) - Call handling additional network features; functional capabilities and information flows; English version ETS 300695:1996
Edition 1996-12

Aerospace series - Titanium and titanium alloys - Forging stock and forgings - Technical specification - Part 2: Forging stock; German version EN 2858-2:1994
Edition 1994-06

Integrated Services Digital Network (ISDN) - Signalling System No. 7 - Message Transfer Part (MTP) to support international interconnection - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification; English version ETS 300008-2:1997
Edition 1998-07