DIN EN 301039-2003 专用综合业务网.使用带有16 kbit/s子复用的64 kbit/s电路方式连接的映射功能
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 Ger