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文章采用多信道共用方式使多个扩容用户共用少数电话通道 ,实现电话线路扩容。应用电子技术和计算机技术研制了DK 1型电话线路扩容器。它包含交换机侧扩容器和用户侧扩容器。介绍了扩容器的硬件电路和软件框图。
The article adopts multi-channel sharing mode to make multiple expansion users share a few telephone channels to realize telephone line expansion. The application of electronic technology and computer technology developed DK 1 telephone line expansion. It includes switch-side and user-side scalars. Introduced the expansion of the hardware circuit and software block diagram.