ETSI TS 132 015-2000 数字蜂窝通信系统(第2+阶段).全球移动通信系统(UMTS).通信管理.收费和计费.分组交换(PS)域的3G呼叫和事件数据.3GPP TS 32.015(版本3.3.0)
Digital Cellular Telecommunications System (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); GSM Call and Event Data for the Packet Switched Domain (3G TS 32.015 Version 3.1.1 Release 1999)