[{"title":"( 8 个子文件 8.48MB ) 现代交换原理ppt","children":[{"title":"现代交换原理第4版 PPT","children":[{"title":"第4章 移动交换技术.ppt <span style='color:#111;'> 803.50KB </span>","children":null,"spread":false},{"title":"第6章 分组交换技术.ppt <span style='color:#111;'> 1.77MB </span>","children":null,"spread":false},{"title":"第5章 智能网.ppt <span style='color:#111;'> 1.36MB </span>","children":null,"spread":false},{"title":"第一章 电信交换基础.ppt <span style='color:#111;'> 1.29MB </span>","children":null,"spread":false},{"title":"第7章 NGN与软交换.ppt <span style='color:#111;'> 1.93MB </span>","children":null,"spread":false},{"title":"第8章 多媒体信息在IP网络.ppt <span style='color:#111;'> 1.10MB </span>","children":null,"spread":false},{"title":"第三章 程控交换技术.ppt <span style='color:#111;'> 2.61MB </span>","children":null,"spread":false},{"title":"第二章 信令系统.ppt <span style='color:#111;'> 2.19MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]