说明：  中文版的详细的GNU GK使用手册，根据说明可以用开源的GNU确良GK与我上传另两个工程实现一个完整的VOIP服务端系统
(Chinese version of the GNU GK detailed user manual can be used according to the notes of the open-source GNU GK really good and I upload the other two works to achieve a complete VoIP service midrange systems)