1. Microsoft Azure cognization
2. Baibu cognization
3. Chinese Yunpian SMS API
4. Cisco API
5. Cisco voice mail IP phone
6. Serialize audio file to WAV or ARM format
7. WeChat API

Final achieved monitor Cisco voice mail on time every time, and convert audio file to text send to Email, serialize audio file send to WeChat, via WeChat can receive audio file from Cisco voice mail.