The necessity of constructing the local railway communication network in Panzhihua Xichang area is described in this paper,and the characteristics of IRSU is analyzed and compared with that of STU.
阐述了建设攀西铁路本地通信网的必要性 ,分析比较了远端模块IRSU与信令转换设备的特点 ,提出利用ISDN远端用户模块IRSU组建攀西铁路本地通信网的方