ETSI TS 143 050-2004 数字蜂窝通信系统(第2+阶段).GSM公用陆地移动网(PLMN)系统的语音业务的传输规划方面.3GPP TS 43.050(版本6.0.0,第6次发布)
Digital cellular telecommunications system (Phase 2+); Transmission Planning Aspects of the Speech Service in the GSM Public Land Mobile Network (PLMN) System 3GPP TS 43.050 Version 6.0.0 Release 6