ETSI TS 102 250-4-2007 语音处理,传输和质量方面(STQ).GSM和3G网络中流行业务的QoS方面.第4部分:业务质量测量设备的要求(版本1.2.1)
Speech Processing, Transmission and Quality Aspects (STQ); QoS aspects for popular services in GSM and 3G networks; Part 4: Requirements for Quality of Service measurement equipment V1.2.1