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.

Discussion on integrated test of electric features of signal equipment;

This paper expounds the role of station s access supervision system played when there is the trouble with station s signal equipment, and introduces the components of the system and the design of its software and hardware.

Aimed at Chinese railway signal equipments fault characteristics and the fault diagnose method which was adoptedat present, the general architecture of Railway Signal Fault Diagnose Expert System was analyzed, the idea that using faultdiagnose method in different level to set up and develop Railway Signal Fault Diagnose Expert System was proposed.

According to the characteristics of thunder and lightning and the harms that may be done by thunder & lightning to railway signals equipment,this paper analyses and illustrates the types of lightning proof of railway signals equipment,and puts forward special anti-thunder protection actions in terms of the ways that the railway signals equipments may be damaged by thunder and lightning.