常用手机仿真软件SDL and TTCN Suite 4.4的lisence文件，软件需要它才能运行,Commonly used simulation software phone SDL and TTCN Suite 4.4 the lisence documents, software, need it to run

Telelogic SDL的书,做大型通信协议必须要学习的一种工具.-Telelogic SDL' s book, doing large-scale communication protocols need to learn an instrument.