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1984年1月中旬,在部直属通信段与广州通信段之间首次开通了由美国进口的Com2集线机倍增载波电话。这种设备采用时间话音插空技术,系统由两部装置组成,分别安装在两端的十六路端机上,并与交换机连接。使用此设备后,话路数提高到31,通话能力约增加一倍。时间话音插空技术的原理是使原先未曾使用的通话能力也投入工作。因为在典型的双向通话中,实际讲话时间不到通话时间的一半,其余时间主要是静听和停顿。根据这一事实,可以利用时间话音插空技术通过话音检测和转换技术把话音交织到其他通话线路中的“空
In mid-January 1984, the Com2 hub-multiplied carrier phone, which was imported from the United States, was first opened between the Ministry of Direct Communications and the Guangzhou Communications segment. This device uses the time voice plug-in technology, the system consists of two devices, respectively, installed on both ends of the sixteen roadside terminal, and connected with the switch. After using this device, the number of speech channels is increased to 31, and the speaking ability is doubled. The principle of time voice insertion technology is to make the previously unused call capabilities also work. Because in a typical two-way conversation, the actual talk time is less than half the talk time, the rest of the time is mainly quiet and pause. Based on this fact, the voice-over-time technique of time can be used to interleave speech to other call lines by using voice detection and conversion techniques