本文对市话网规划中的重要问题之一,市话交换设备的分期扩容方案的优化问题进行了研究.在分析了市话交换设备在分期建设中各项费用与扩容量的关系及其它有关因素的基础上,建立了市话交换设备分期建设的线性规划模型,并给出了模型的求解方案.最后通过本模型对一问题的计算分析,给出了问题的优化结果和在实际中使用本模型会遇到的问题及解决的途径. This paper studies one of the most important issues in the planning of local telephone network and the optimization of the staged expansion scheme of the local exchange equipment.After analyzing the relationship between the cost and capacity expansion of the local exchange equipment and other related factors , Set up a linear programming model for staging of local exchange equipment, and give a solution to the model.Finally, through the calculation and analysis of a problem in this model, the optimization results of the problem are given and in practice, the model will meet To the problem and the way to solve.