专用自动交换分机

例句：

1. 1. This phonesystem is designed for specific applications, suchas voice and data communication.
   这个电话系统是为特定的应用设计的，比如语音和数据通信。
2. 2. The company has installed a dedicated auto-exchange system to improve customer service.
   该公司已经安装了一套专用的自动交换系统来提高客户服务。
3. 3. The new exchange system will allowusers to switch between different networks with justa few clicks.
   新的交换系统将允许用户通过几次点击在不同的网络之间切换。