Digital cellular telecommunications system (Phase 2+) (GSM) - User-to-User Signalling (UUS) - Stage 3 (GSM 04.87 version 7.0.2 Release 1998) (Endorsement of the English version EN 301711 V 7.0.2 (1999-12) as German standard)
Edition 2003-08

Digital cellular telecommunications system (Phase 2+) (GSM) - GSM Cordless telephony system (CTS), Phase 1 - CTS Architecture description; Stage 2 (GSM 03.56 version 7.1.1 Release 1998) (Endorsement of the English version EN 302405 V 7.1.1 (2000-08) as German standard)
Edition 2003-08

Digital cellular telecommunications system (Phase 2) - ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec (GSM 06.53 version 4.0.1) (Endorsement of the English version EN 301244 V 4.0.1 (1998-01) as German standard)
Edition 2003-11

Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - Service description - Stage 1 (GSM 02.56 version 8.0.1 Release 1999) (Endorsement of the English version EN 302403 V8.0.1 (2000-10) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - Lower Layers of the CTS Radio Interface - Stage 2 (GSM 03.52 version 8.0.1 Release 1999) (Endorsement of the English version EN 302404 V8.0.1 (2000-09) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - CTS radio interface layer 3 specification (GSM 04.56 version 8.0.1 Release 1999) (Endorsement of the English version EN 302406 V8.0.1 (2000-08) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2+) - GSM Cordless Telephony System (CTS), Phase 1 - CTS supervising system layer 3 specification (GSM 04.57 version 8.0.1 Release 1999) (Endorsement of the English version EN 302407 V8.0.1 (2000-08) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2) - Attachment requirements for Global System for Mobile communications (GSM) - Part 1: Mobile stations in the GSM 900 and DCS 1800 bands - Access (GSM 13.01 version 4.1.1) (Endorsement of the English version EN 301419-1 V4.1.1 (2000-04) as German standard)
Edition 2004-03

Digital cellular telecommunications system (Phase 2) - Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface (Endorsement of the English version ETS 300560:1996-05 as German standard)
Edition 2001-04

Digital cellular telecommunications system (Phase 2) - Call Waiting (CW) and Call Holding (HOLD) supplementary services - Stage 1 (Endorsement of the English version ETS 300516:1996-05 as German standard)
Edition 2001-04