Private Integrated Services Network (PISN) - Mapping functions for the employment of 64 kbit/s circuit mode connections with 16 kbit/s sub-multiplexing (ISO/IEC 17310 (2002), modified) (Endorsement of the English version EN 301039 V 1.2.1 (2002-09) as German standard)
专用综合业务网(PISN).使用64kbit/s电路模式连接和16kbit/s子多路复用的映射功能(ISO/IEC 17310(2002) 修改)(作为德国标准认可英文版EN 301039 V 1.2.1(2002-09)