ETSI EN 300 260-2004 专用综合业务网(PISN).规范,功能模型和信息流.呼叫转移补充业务(版本1.3.1).ISO/IEC 13865(2003),修正本
Private Integrated Services Network (PISN); Specification, functional models and information flows; Call transfer supplementary service (V1.3.1; ISO/IEC 13865 (2003), modified)