DIN ETS 300712:1997-12 Integrated Services Digital Network (ISDN) - Public Switched Telephone Network (PSTN) - Premium Rate (PRM) service; service description; English version ETS 300712:1997

标准编号：DIN ETS 300712:1997-12

英文标题：Integrated Services Digital Network (ISDN) - Public Switched Telephone Network (PSTN) - Premium Rate (PRM) service; service description; English version ETS 300712:1997

德文标题：Diensteintegrierendes Digitalnetz (ISDN) - Öffentliches Fernsprechwählnetz (PSTN) - Mehrwertdienst mit besonderer Kennzahl und besonderem Entgelt; Dienstbeschreibung; Englische Fassung ETS 300712:1997

发布日期：1997-12

DIN ETS 300712:1997-12 Integrated Services Digital Network (ISDN) - Public Switched Telephone Network (PSTN) - Premium Rate (PRM) service; service description; English version ETS 300712:1997

标准预览图