Abstract: This paper attempts to analyze the cross-layer capacity from the DSL systems of military field phone line under DMT（Discrete Multi-Tone）.Using the self-similarity of network traffic analysis method appeared in recent years，the characteristic of military field phone line form ADSL communication channel has been researched considering the more NEXT（Near End Cross Talk） interference.At the same time，the overflow probability and the effective channel capacity also have been modeled and simulated by fluid flow model solution.The methodologies have reference value for the furthermore research on communication system of military.

摘要： 分析了军用被覆线的DSL系统在DMT（离散多音频调制）下的跨层容量。重点阐述了在考虑多NEXT（近端串扰）干扰的情况下基于网络流量自相似特性的军用被覆线信道特性，提出并采用流体流模型分析方法对军用被覆线跨层溢出概率和有效信道容量建模。实验仿真和计算结果对进一步研究军事通信网系统有很好的参考价值。