central switching meaning in Chinese

中心转接

Without the central switch a lot of channels and tracks are shared by many users , the cost of the channels is reduced and the utilization factor of them is improved . user can call others by dialing the number , and the dialing is simple and quick
本文给出了有限用户的呼损率公式和有限用户多信道共用系统的信道配置方法，并可根据实际话务量、系统用户数、呼损率配置共用绳路数和中继线对数。
The technique of the multi - channels sharing and the bus topological structure are adopted in the system , which does n ' t set the central switch and which not only can realize many users share a few explosion - proof channels , but also reduce the cost of the channels , while improving the utilization factor of them . the users " extension is flexible and convenient . the system has the functions of amplifying call and telephone talk
该系统不设主机，采用多信道共用技术和总线式拓扑结构，实现多用户共用少数防爆绳路，降低了绳路成本且提高了利用率；用户扩展灵活、方便：具有扩音呼叫和电话对讲功能；工程布线简单，费用低，工期短。