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为了解决模拟通信系统与数宇通信系统的对接问题，研制了时分／频分复用变换设备．该设备由ＰＣＭ复用和２６００Ｈｚ单频脉冲型线路信令－数字型信令转换两部分组成．经实际应用表明，该系统性能可靠，使用方便．
In order to solve the docking problem of analog communication system and digital communication system, a time / frequency division multiplexing conversion equipment was developed. The device consists of PCM multiplexing and 2600Hz single-frequency pulse type line signaling - digital signaling conversion of two parts. The practical application shows that the system is reliable and easy to use.