Private Integrated Services Network (PISN) - Specification, functional models and information flows - Circuit-mode multi-rate bearer services [ISO/IEC 11584 (1996) modified]; English version EN 301049 V 1.1.1 (1997.09)
专用综合业务网(PISN).规范 功能模型和信息流.电路模式多速率承载业务[ISO/IEC 11584(1996)修改];英文版EN 301049 V 1.1.1(1997.09)