在现代化的法国铁路网中,日蒙一施乃德公司生产的全电子时分制微机控制的专用自动分线小交换机已经代替了原有的传统分布式选号各站电话。在专用自动分线小交换机系统中,每一个车站均有一个特定的呼叫号码,它通过小交换机可以与网络上所连接的任何一个其它车站实现通话功能,有必要时还可以与国内其它 In the modern French railway network, the dedicated automatic sub-line of small and medium sized microcomputer-controlled automatic branch exchangers manufactured by Nidec and Schneider Electric Co., Ltd. have replaced the existing traditional distributed selective telephone stations. In the dedicated automatic sub-line exchange system, each station has a specific call number, it can be connected with the network through the small exchange of any other station to achieve the call function, if necessary, but also with other domestic