随着工作方式和业务交往移动性的增长，无线办公系统日益成为各大企业办公的主流通信工具，而移动无线电话和移动数据传输是无线办公系统的两种主要工具。办公机构移动电话的使用一面减少了电话连接线，但另一方面也使许多语音信箱急剧增多，然而覆盖范围小，通话质量低，而且 With the increasing mobility of working methods and business contacts, wireless office systems are increasingly becoming the mainstream communications tools used by major enterprises. Mobile radiotelephone and mobile data transmission are two main tools of wireless office systems. The use of office-based mobile phones has reduced the number of telephone lines, but on the other hand has led to a dramatic increase in the number of voicemails, however, with small coverage, poor call quality, and