Abstract: At present the fixed telephone networks of telecom operators have developed in large scale,but in the fierce market competition,how to optimize the network structure,improve network resource utilization,open a variety of intelligence services,enhance the market competitiveness are imperative problems to be solved by telecom operators in order that a breakthrough can be found.Based on the status quo of  Hunan Tietong communications network,a reform program of fixed intelligence is proposed to make full use of fixed telephone network resources,optimize the network structure,achieve fixed-network intelligence,open a variety of intelligence services,meet the customized needs of subscribers,enhance the market competitiveness,and make the PSTN network produce max economic benefits,.This paper describes the main problems of the current PSTN network,the purpose,basic principle and services of fixed-network intelligence.Finally this paper analyses the fixed-network intelligence reform program and the improved efficiency after reform.

Key words: PSTN, competitiveness, network, intelligence