Private Integrated Services Network (PISN) - Functional requirements for static circuit-mode inter-PINX connections (ISO/IEC 14474 (1998), modified) (Endorsement of the English version EN 301765 V 1.1.1 (2000-08) as German standard)
专用综合业务网(PISN).静态电路模式PINX间连接的功能要求(ISO/IEC 14474(1998) 修改)(作为德国标准认可英文版EN 301765 V 1.1.1(2000-08)