长途通信网的英文

toll network

trunk network

• 长途:    long-distance
• 通信:    communication; com ...
• 网:    net

例句与用法

1. As soon as sdh appeared , it obtains broad applications in many fields including wan ( wide area network ) , lan ( local area network ) and man ( metropolitan area network )
   正是这些pdh无法比拟的优势使得sdh一经出现,就显示出了强大的生命力,在城域主干网,长途通信网和广域网中得到了越来越广泛的应用。