Public Switched Telephone Network (PSTN) - Category II specification for 300 bit/s duplex modems standardized for use on the PSTN (Endorsement of the English version ETS 300115:1997 as German standard)
Edition 1999-06

Integrated Services Digital Network (ISDN) - Basic User Network Interface (UNI) - Part 3: Implementation Conformance Statement (ICS) and Implementation eXtra Information for Testing (IXIT) specification for interface IB (Endorsement of the English version ETS 300012-3:1998 as German Standard)
Edition 2000-02

Integrated Services Digital Network (ISDN) - Basic User Network Interface (UNI) - Part 4: Conformance test specification for interface IA (Endorsement of the English version ETS 300012-4:1998 as German Standard)
Edition 2000-02

Integrated Services Digital Network (ISDN) - Basic User Network Interface (UNI) - Part 6: Abstract Test Suite (ATS) specification for interface IA (Endorsement of the English version ETS 300012-6:1998 as German Standard)
Edition 2000-02

Integrated Services Digital Network (ISDN) - Basic User Network Interface (UNI) - Part 7: Abstract Test Suite (ATS) specification for interface IB (Endorsement of the English version ETS 300012-7:1998 as German Standard)
Edition 2000-02

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; Direct Dialling In (DDI) supplementary service - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version ETS 300661-2:1997 as German Standard)
Edition 2000-05

Broadband Integrated Services Digital Network (B-ISDN) - Signalling ATM Adaptation Layer (SAAL); Service Specific Connection Oriented Protocol (SSCOP) - Part 3: Test Suite Structure and Test Purposes (TSS&TP) specification (Endorsement of the English version ETS 300436-3:1999 as German standard)
Edition 2000-12

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol; closed User Group (CUG) supplementary service - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version ETS 300770-2:1998 as German standard)
Edition 2000-01

Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. two (DSS2) protocol; generic functional protocol; core aspects - Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification (Endorsement of the English version ETS 300796-2:1998 as German standard)
Edition 2000-01

Broadband Integrated Services Digital Network (B-ISDN) - Digital Subscriber Signalling System No. two (DSS2) protocol - Closed User Group (CUG) supplementary service - Part 1: Protocol specification (ITU-T Q.2955.1:1996, modified) (Endorsement of the English version ETS 300770-1:1998 as German standard)
Edition 2000-01