DIN ETS 300625:2001-04 Digital cellular telecommunications system (Phase 2) - Unstructured Supplementary Service Data (USSD) - Stage 1 (Endorsement of the English version ETS 300625:1997-09 as German standard) / Note: Endorsement notice
2001DIN ETS 300625:2001-04 Digital cellular telecommunications system (Phase 2) - Unstructured Supplementary Service Data (USSD) - Stage 1 (Endorsement of the English version ETS 300625:1997-09 as German standard) / Note: Endorsement notice
2001DIN ETS 300625:2001 Digital cellular telecommunications system (Phase 2) - Unstructured Supplementary Service Data (USSD) - Stage 1 (Endorsement of the English version ETS 300625:1997-09 as German standard)